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About Hex Nuts
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Choose a hex nut with the right profile, material, and strength for your application.
Mil. Spec. Hex Nuts
Medium-Strength Steel
 |
These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
Cadmium Yellow-Chromate-Plated Steel— The plating creates a barrier against rust, so these nuts are suitable for most wet and outdoor environments. They also thread on smoothly without sticking.
Thread Size | Wd. | Ht. | Mil. Spec. | Fastener Strength Grade/Class | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Cadmium Yellow-Chromate-Plated Steel | ||||||||||
| 1/4"-20 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51967-2 | SAE Grade 5 | — | 25 | 94575A110 | 000000 | ||
| 1/4"-28 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51968-2 | SAE Grade 5 | — | 25 | 94575A120 | 00000 | ||
| 5/16"-18 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51967-5 | SAE Grade 5 | — | 25 | 94575A230 | 00000 | ||
| 5/16"-24 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51968-5 | SAE Grade 5 | — | 25 | 94575A240 | 00000 | ||
| 3/8"-16 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51967-8 | SAE Grade 5 | Material Certificate | 10 | 94575A350 | 0000 | ||
| 3/8"-24 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51968-8 | SAE Grade 5 | — | 10 | 94575A360 | 0000 | ||
| 7/16"-14 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51967-11 | SAE Grade 5 | — | 5 | 94575A730 | 0000 | ||
| 7/16"-20 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51968-11 | SAE Grade 5 | — | 10 | 94575A710 | 00000 | ||
| 1/2"-13 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51967-14 | SAE Grade 5 | Material Certificate | 10 | 94575A470 | 00000 | ||
| 1/2"-20 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51968-14 | SAE Grade 5 | — | 10 | 94575A480 | 00000 | ||
| 9/16"-12 | 7/8" | 31/64" | Fed. Spec. FF-N-836, MS51967-17 | SAE Grade 5 | — | 5 | 94575A750 | 00000 | ||
| 5/8"-11 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51967-20 | SAE Grade 5 | — | 5 | 94575A510 | 00000 | ||
| 5/8"-18 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51968-20 | SAE Grade 5 | — | 5 | 94575A520 | 00000 | ||
| 3/4"-10 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51967-23 | SAE Grade 5 | — | 1 | 94575A630 | 0000 | ||
| 3/4"-16 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51968-23 | SAE Grade 5 | — | 5 | 94575A640 | 00000 | ||
High-Strength Steel
|
Thread Size | Wd. | Ht. | Mil. Spec. | Fastener Strength Grade/Class | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Steel | ||||||||||
| 1/4"-20 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51967-3 | SAE Grade 8 | — | 5 | 94191A111 | 00000 | ||
| 1/4"-28 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51968-3 | SAE Grade 8 | Material Certificate | 5 | 94191A112 | 0000 | ||
| 5/16"-18 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51967-6 | SAE Grade 8 | — | 5 | 94191A113 | 0000 | ||
| 3/8"-16 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51967-9 | SAE Grade 8 | Material Certificate | 1 | 94191A115 | 0000 | ||
| 3/8"-24 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51968-9 | SAE Grade 8 | — | 1 | 94191A116 | 0000 | ||
| 7/16"-14 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51967-12 | SAE Grade 8 | — | 1 | 94191A117 | 0000 | ||
| 7/16"-20 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51968-12 | SAE Grade 8 | — | 1 | 94191A118 | 0000 | ||
| 1/2"-13 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51967-15 | SAE Grade 8 | — | 1 | 94191A119 | 0000 | ||
| 1/2"-20 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51968-15 | SAE Grade 8 | — | 1 | 94191A120 | 0000 | ||
| 9/16"-18 | 7/8" | 31/64" | Fed. Spec. FF-N-836, MS51968-18 | SAE Grade 8 | — | 1 | 94191A121 | 0000 | ||
| 5/8"-11 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51967-21 | SAE Grade 8 | — | 1 | 94191A122 | 00000 | ||
| 5/8"-18 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51968-21 | SAE Grade 8 | — | 1 | 94191A123 | 0000 | ||
| 3/4"-10 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51967-24 | SAE Grade 8 | — | 1 | 94191A124 | 00000 | ||
| 3/4"-16 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51968-24 | SAE Grade 8 | Material Certificate | 1 | 94191A125 | 00000 | ||
Cadmium Yellow-Chromate-Plated Steel | ||||||||||
| 1/4"-20 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51967-3 | SAE Grade 8 | — | 25 | 94191A100 | 00000 | ||
| 1/4"-28 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51968-3 | SAE Grade 8 | — | 25 | 94191A150 | 00000 | ||
| 5/16"-18 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51967-6 | SAE Grade 8 | — | 25 | 94191A200 | 00000 | ||
| 5/16"-24 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51968-6 | SAE Grade 8 | Material Certificate | 25 | 94191A250 | 00000 | ||
| 3/8"-16 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51967-9 | SAE Grade 8 | — | 10 | 94191A300 | 0000 | ||
| 3/8"-24 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51968-9 | SAE Grade 8 | — | 10 | 94191A350 | 0000 | ||
| 7/16"-14 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51967-12 | SAE Grade 8 | Material Certificate | 5 | 94191A400 | 0000 | ||
| 7/16"-20 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51968-12 | SAE Grade 8 | — | 5 | 94191A450 | 0000 | ||
| 1/2"-13 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51967-15 | SAE Grade 8 | — | 5 | 94191A500 | 0000 | ||
| 1/2"-20 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51968-15 | SAE Grade 8 | — | 5 | 94191A550 | 0000 | ||
| 9/16"-18 | 7/8" | 31/64" | Fed. Spec. FF-N-836, MS51968-18 | SAE Grade 8 | — | 5 | 94191A750 | 0000 | ||
| 5/8"-11 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51967-21 | SAE Grade 8 | — | 5 | 94191A800 | 00000 | ||
| 5/8"-18 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51968-21 | SAE Grade 8 | — | 5 | 94191A600 | 00000 | ||
| 3/4"-10 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51967-24 | SAE Grade 8 | — | 1 | 94191A650 | 0000 | ||
| 3/4"-16 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51968-24 | SAE Grade 8 | — | 1 | 94191A900 | 0000 | ||
Low-Strength Steel
|
Rated Grade 2, Class 6, or lower, these nuts are about half as strong as medium-strength nuts. They are suitable for light duty fastening applications, such as securing access panels. Use them with screws that have a similar strength rating to avoid stripping threads during installation.
Cadmium Yellow-Chromate-Plated Steel— The plating creates a barrier against rust, so these nuts are suitable for most wet and outdoor environments. They also thread on smoothly without sticking.
Steel—Best for dry environments since moisture will cause these nuts to rust.
Thread Size | Wd. | Ht. | Mil. Spec. | Fastener Strength Grade/Class | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|
Cadmium Yellow-Chromate-Plated Steel | ||||||||||
| 2-56 | 3/16" | 1/16" | Fed. Spec. FF-N-836, MS35649-222 | — | Material Certificate | 10 | 91813A110 | 000000 | ||
| 4-40 | 1/4" | 3/32" | Fed. Spec. FF-N-836, MS35649-242 | — | Material Certificate | 50 | 91813A120 | 00000 | ||
| 6-32 | 5/16" | 7/64" | Fed. Spec. FF-N-836, MS35649-262 | — | Material Certificate | 10 | 91813A130 | 0000 | ||
| 8-32 | 11/32" | 1/8" | Fed. Spec. FF-N-836, MS35649-282 | — | Material Certificate | 50 | 91813A140 | 00000 | ||
| 10-24 | 3/8" | 1/8" | Fed. Spec. FF-N-836, MS35649-202 | — | — | 50 | 91813A150 | 00000 | ||
| 10-32 | 3/8" | 1/8" | Fed. Spec. FF-N-836, MS35650-302 | — | Material Certificate | 50 | 91813A160 | 00000 | ||
| 1/4"-20 | 7/16" | 3/16" | Fed. Spec. FF-N-836, MS35649-2252 | — | Material Certificate | 50 | 91813A170 | 00000 | ||
| 5/16"-18 | 9/16" | 7/32" | Fed. Spec. FF-N-836, MS35649-2312 | — | Material Certificate | 25 | 91813A180 | 00000 | ||
| 3/8"-16 | 5/8" | 1/4" | Fed. Spec. FF-N-836, MS35649-2382 | — | — | 25 | 91813A190 | 00000 | ||
Steel | ||||||||||
| 2"-4 1/2 | 3" | 1 23/32" | MIL-DTL-1222 | SAE Grade 2 | — | 1 | 90490A046 | 00000 | ||
Corrosion-Resistant Stainless Steel
|
18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
Thread Size | Wd. | Ht. | Mil. Spec. | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 0-80 | 5/32" | 3/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35650-314 | Material Certificate | 5 | 91240A001 | 00000 | ||
| 2-56 | 3/16" | 1/16" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-224 | Material Certificate | 25 | 91240A003 | 00000 | ||
| 4-40 | 1/4" | 3/32" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-244 | Material Certificate | 25 | 91240A005 | 00000 | ||
| 6-32 | 5/16" | 7/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-264 | Material Certificate | 25 | 91240A007 | 00000 | ||
| 8-32 | 11/32" | 1/8" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-284 | Material Certificate | 10 | 91240A009 | 0000 | ||
| 10-24 | 3/8" | 1/8" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-204 | Material Certificate | 10 | 91240A011 | 0000 | ||
| 10-32 | 3/8" | 1/8" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35650-304 | Material Certificate | 10 | 91240A411 | 0000 | ||
| 1/4"-20 | 7/16" | 3/16" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-2254 | Material Certificate | 10 | 91240A029 | 0000 | ||
| 1/4"-20 | 7/16" | 7/32" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-1 | Material Certificate | 10 | 90762A112 | 0000 | ||
| 1/4"-28 | 7/16" | 3/16" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35650-3254 | Material Certificate | 5 | 91240A078 | 0000 | ||
| 1/4"-28 | 7/16" | 7/32" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51972-1 | Material Certificate | 10 | 90762A115 | 0000 | ||
| 5/16"-18 | 1/2" | 17/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-2 | Material Certificate | 10 | 90762A118 | 0000 | ||
| 5/16"-18 | 9/16" | 7/32" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-2314 | Material Certificate | 5 | 91240A030 | 0000 | ||
| 5/16"-24 | 1/2" | 17/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51972-2 | Material Certificate | 5 | 90762A123 | 0000 | ||
| 5/16"-24 | 9/16" | 7/32" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35650-3314 | Material Certificate | 1 | 91240A511 | 0000 | ||
| 3/8"-16 | 9/16" | 21/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-3 | Material Certificate | 5 | 90762A127 | 0000 | ||
| 3/8"-16 | 5/8" | 1/4" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35649-2384 | Material Certificate | 5 | 91240A031 | 00000 | ||
| 3/8"-24 | 9/16" | 21/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51972-3 | Material Certificate | 5 | 90762A132 | 0000 | ||
| 3/8"-24 | 5/8" | 1/4" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS35650-3384 | Material Certificate | 1 | 91240A512 | 0000 | ||
| 1/2"-13 | 3/4" | 7/16" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-5 | Material Certificate | 1 | 90762A136 | 0000 | ||
| 1/2"-20 | 3/4" | 7/16" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51972-5 | Material Certificate | 1 | 90762A139 | 0000 | ||
| 5/8"-11 | 15/16" | 35/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-7 | Material Certificate | 1 | 90762A144 | 0000 | ||
| 3/4"-10 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, Fed. Spec. QQ-P-35, MS51971-8 | — | 1 | 90762A147 | 0000 | ||
Mil. Spec. Distorted-Thread Flange Nuts
Not only do these have the strongest hold of all the flange nuts we offer, they are also manufactured and tested to strict U.S. military standards for material and construction. They have irregularly shaped threads that grip the screw to resist loosening in high-vibration applications. The threads prevent the nut from backing out, but they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch, so they are not reusable. Nuts have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Low-Strength Steel
 |
About half the strength of medium-strength steel nuts. Use them with screws that have a similar strength rating to avoid stripping threads during installation.
Cadmium-Plated Steel—The plating reduces friction during installation, so these nuts thread on smoother than others. It also creates a barrier against rust that's comparable to zinc yellow-chromate plating.
Cadmium Yellow-Chromate-Plated Steel—Better corrosion resistance than plain cadmium. These nuts withstand salt water and are suitable for most wet and outdoor environments.
Flange | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Wd. | Ht. | Dia. | Thk. | Mil. Spec. | Certificate Type | Pkg. Qty. | Pkg. | |||
Cadmium-Plated Steel | |||||||||||
| 2-56 | 1/8" | 3/32" | 0.167" | 0.01" | MS21042L02 | Material Certificate | 5 | 95307A801 | 000000 | ||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21042L04 | Material Certificate | 5 | 95307A802 | 0000 | ||
| 6-32 | 3/16" | 9/64" | 0.244" | 0.03" | MS21042L06 | Material Certificate | 5 | 95307A803 | 0000 | ||
| 8-32 | 7/32" | 3/16" | 0.29" | 0.03" | MS21042L08 | Material Certificate | 5 | 95307A804 | 0000 | ||
| 10-32 | 1/4" | 3/16" | 0.33" | 0.03" | MS21042L3 | Material Certificate | 5 | 95307A805 | 0000 | ||
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.04" | MS21042L4 | Material Certificate | 5 | 95307A806 | 0000 | ||
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | MS21042L5 | Material Certificate | 1 | 95307A807 | 0000 | ||
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.04" | MS21042L6 | Material Certificate | 1 | 95307A808 | 0000 | ||
Cadmium Yellow-Chromate-Plated Steel | |||||||||||
| 2-56 | 1/8" | 3/32" | 0.167" | 0.01" | MS21042-02 | Material Certificate | 5 | 95307A800 | 0000 | ||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21042-04 | Material Certificate | 5 | 95307A100 | 0000 | ||
| 6-32 | 3/16" | 9/64" | 0.244" | 0.03" | MS21042-06 | Material Certificate | 5 | 95307A200 | 0000 | ||
| 8-32 | 7/32" | 3/16" | 0.29" | 0.03" | MS21042-08 | Material Certificate | 5 | 95307A300 | 0000 | ||
| 10-32 | 1/4" | 3/16" | 0.33" | 0.03" | MS21042-3 | Material Certificate | 5 | 95307A400 | 0000 | ||
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.04" | MS21042-4 | Material Certificate | 5 | 95307A500 | 0000 | ||
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | MS21042-5 | Material Certificate | 1 | 95307A600 | 0000 | ||
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.04" | MS21042-6 | Material Certificate | 1 | 95307A700 | 0000 | ||
Corrosion-Resistant Stainless Steel
|
High-Temperature A286 Stainless Steel—Stronger than 316 stainless steel and withstand high temperatures up to 1500° F. These nuts resist corrosion from chemicals, such as bleach and chlorine, but they won't hold up to salt water as well as 316 stainless steel.
High-Temperature Silver-Plated A286 Stainless Steel—The silver plating reduces friction during installation, so these nuts thread on smoother than others. They are stronger than 316 stainless steel and withstand temperatures up to 800° F. Nuts resist corrosion from chemicals, such as bleach and chlorine, but won't hold up to salt water as well as 316 stainless steel.
Flange | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Wd. | Ht. | Dia. | Thk. | Mil. Spec. | Certificate Type | Pkg. Qty. | Pkg. | |||
High-Temperature A286 Stainless Steel | |||||||||||
| 2-56 | 1/8" | 3/32" | 0.167" | 0.01" | NAS1291C02M | Material Certificate | 5 | 98892A800 | 000000 | ||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.01" | NAS1291C04M | Material Certificate | 1 | 98892A121 | 0000 | ||
| 6-32 | 3/16" | 9/64" | 0.244" | 0.01" | NAS1291C06M | Material Certificate | 1 | 98892A111 | 0000 | ||
| 8-32 | 7/32" | 3/16" | 0.29" | 0.02" | NAS1291C08M | Material Certificate | 1 | 98892A122 | 0000 | ||
| 10-32 | 1/4" | 3/16" | 0.33" | 0.02" | NAS1291C3M | Material Certificate | 1 | 98892A112 | 0000 | ||
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.02" | NAS1291C4M | Material Certificate | 1 | 98892A113 | 0000 | ||
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.03" | NAS1291C5M | Material Certificate | 1 | 98892A123 | 0000 | ||
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.03" | NAS1291C6M | Material Certificate | 1 | 98892A114 | 0000 | ||
| 7/16"-20 | 1/2" | 21/64" | 0.708" | 0.04" | NAS1291C7M | Material Certificate | 1 | 98892A115 | 00000 | ||
| 1/2"-20 | 9/16" | 13/32" | 0.814" | 0.04" | NAS1291C8M | Material Certificate | 1 | 98892A116 | 00000 | ||
High-Temperature Silver-Plated A286 Stainless Steel | |||||||||||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21043-04 | Material Certificate | 5 | 98892A100 | 00000 | ||
| 6-32 | 3/16" | 9/64" | 0.244" | 0.03" | MS21043-06 | Material Certificate | 5 | 98892A200 | 00000 | ||
| 8-32 | 7/32" | 3/16" | 0.29" | 0.03" | MS21043-08 | Material Certificate | 5 | 98892A300 | 00000 | ||
| 10-32 | 1/4" | 3/16" | 0.33" | 0.03" | MS21043-3 | Material Certificate | 5 | 98892A400 | 00000 | ||
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.04" | MS21043-4 | Material Certificate | 5 | 98892A500 | 00000 | ||
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | MS21043-5 | Material Certificate | 1 | 98892A600 | 0000 | ||
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.04" | MS21043-6 | Material Certificate | 1 | 98892A700 | 0000 | ||
Mil. Spec. Narrow-Profile Hex Nuts
These nuts are manufactured and tested to strict U.S. military standards for material and construction. They are about 20% narrower to fit in tight spots where standard-profile nuts won't fit. Also known as small-pattern hex nuts.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Corrosion-Resistant Stainless Steel
 |
18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
Thread Size | Wd. | Ht. | Mil. Spec. | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 0-80 | 1/8" | 3/64" | Fed. Spec. FF-N-836, NAS671C0 | Material Certificate | 10 | 91834A106 | 000000 | ||
| 2-56 | 5/32" | 1/16" | Fed. Spec. FF-N-836, NAS671C2 | Material Certificate | 10 | 91834A101 | 00000 | ||
| 4-40 | 3/16" | 1/16" | Fed. Spec. FF-N-836, NAS671C4 | Material Certificate | 10 | 91834A102 | 0000 | ||
| 6-32 | 1/4" | 3/32" | Fed. Spec. FF-N-836, NAS671C6 | Material Certificate | 10 | 91834A103 | 00000 | ||
| 8-32 | 5/16" | 7/64" | Fed. Spec. FF-N-836, NAS671C8 | Material Certificate | 10 | 91834A104 | 00000 | ||
| 10-32 | 11/32" | 1/8" | Fed. Spec. FF-N-836, NAS671C10 | Material Certificate | 5 | 91834A105 | 00000 | ||
Mil. Spec. Nylon-Insert Locknuts
These locknuts are manufactured and tested to strict U.S. military standards for material and construction. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Low-Strength Steel
 |
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
Cadmium Yellow-Chromate-Plated Steel | |||||||||
| 4-40 | 1/4" | 5/32" | MS21044-N04 | 250 | 10 | 95154A110 | 000000 | ||
| 6-32 | 5/16" | 3/16" | MS21044-N06 | 250 | 10 | 95154A120 | 00000 | ||
| 8-32 | 11/32" | 9/32" | MS21044-N08 | 250 | 10 | 95154A130 | 0000 | ||
| 10-32 | 3/8" | 9/32" | MS21044-N3 | 250 | 10 | 95154A140 | 0000 | ||
| 1/4"-28 | 7/16" | 23/64" | MS21044-N4 | 250 | 10 | 95154A150 | 0000 | ||
| 5/16"-24 | 1/2" | 23/64" | MS21044-N5 | 250 | 5 | 95154A160 | 0000 | ||
| 3/8"-24 | 9/16" | 15/32" | MS21044-N6 | 250 | 5 | 95154A170 | 00000 | ||
| 1/2"-20 | 3/4" | 19/32" | MS21044-N8 | 250 | 5 | 95154A180 | 0000 | ||
| 5/8"-18 | 15/16" | 3/4" | MS21044-N10 | 250 | 1 | 95154A190 | 0000 | ||
Corrosion-Resistant Stainless Steel
|
18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 2-56 | 1/4" | 9/64" | MS17830-02C, MS21044C02, NASM17830, NASM21044 | 250 | 1 | 96345A186 | 00000 | ||
| 4-40 | 1/4" | 5/32" | MS21044C04, NASM21044 | 250 | 10 | 96345A210 | 00000 | ||
| 6-32 | 5/16" | 3/16" | MS21044C06, NASM21044 | 250 | 10 | 96345A220 | 00000 | ||
| 8-32 | 11/32" | 9/32" | MS21044C08, NASM21044 | 250 | 10 | 96345A230 | 00000 | ||
| 10-24 | 3/8" | 15/64" | MS17830-010C, NASM17830 | 250 | 5 | 96345A280 | 0000 | ||
| 10-32 | 3/8" | 9/32" | MS21044C3, NASM21044 | 250 | 10 | 96345A240 | 00000 | ||
| 1/4"-20 | 7/16" | 5/16" | MS17830-4C, NASM17830 | 250 | 5 | 96345A290 | 00000 | ||
| 1/4"-28 | 7/16" | 23/64" | MS21044C4, NASM21044 | 250 | 5 | 96345A250 | 00000 | ||
| 5/16"-18 | 1/2" | 11/32" | MS17830-5C, NASM17830 | 250 | 5 | 96345A310 | 00000 | ||
| 3/8"-16 | 9/16" | 29/64" | MS17830-6C, NASM17830 | 250 | 1 | 96345A320 | 0000 | ||
| 3/8"-24 | 9/16" | 15/32" | MS17830-6F, MS21044C6, NASM17830, NASM21044 | 250 | 1 | 96345A342 | 0000 | ||
| 7/16"-20 | 11/16" | 15/32" | MS17830-7F, MS21044C7, NASM17830, NASM21044 | 250 | 1 | 96345A765 | 00000 | ||
Mil. Spec. Thin-Profile Hex Nuts
Corrosion-Resistant Stainless Steel
 |
18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
Thread Size | Wd. | Ht. | Mil. Spec. | Certificate Type | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 1/4"-20 | 7/16" | 5/32" | Fed. Spec. FF-N-836, MS35691-3 | — | 5 | 92101A210 | 000000 | ||
| 1/4"-28 | 7/16" | 5/32" | Fed. Spec. FF-N-836, MS35691-7 | — | 1 | 92101A320 | 0000 | ||
| 5/16"-18 | 1/2" | 3/16" | Fed. Spec. FF-N-836, MS35691-11 | Material Certificate | 5 | 92101A430 | 00000 | ||
| 5/16"-24 | 1/2" | 3/16" | Fed. Spec. FF-N-836, MS35691-15 | — | 5 | 92101A540 | 00000 | ||
| 3/8"-16 | 9/16" | 7/32" | Fed. Spec. FF-N-836, MS35691-19 | — | 1 | 92101A650 | 0000 | ||
| 3/8"-24 | 9/16" | 7/32" | Fed. Spec. FF-N-836, MS35691-23 | — | 1 | 92101A760 | 0000 | ||
| 7/16"-14 | 11/16" | 1/4" | Fed. Spec. FF-N-836, MS35691-27 | Material Certificate | 1 | 92101A101 | 00000 | ||
| 7/16"-20 | 11/16" | 1/4" | Fed. Spec. FF-N-836, MS35691-31 | — | 1 | 92101A102 | 0000 | ||
| 1/2"-13 | 3/4" | 5/16" | Fed. Spec. FF-N-836, MS35691-35 | Material Certificate | 1 | 92101A870 | 0000 | ||
| 1/2"-20 | 3/4" | 5/16" | Fed. Spec. FF-N-836, MS35691-39 | Material Certificate | 1 | 92101A980 | 0000 | ||
| 5/8"-11 | 15/16" | 3/8" | Fed. Spec. FF-N-836, MS35691-51 | — | 1 | 92101A103 | 00000 | ||
| 5/8"-18 | 15/16" | 3/8" | Fed. Spec. FF-N-836, MS35691-55 | — | 1 | 92101A104 | 00000 | ||
Mil. Spec. Flex-Top Locknuts for Heavy Vibration
 |
Steel
Thread Size | Wd. | Ht. | Mil. Spec. | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
Cadmium-Plated Steel | ||||||||
| 4-40 | 1/4" | 5/32" | MS21045-04 | 5 | 99638A101 | 000000 | ||
| 6-32 | 5/16" | 3/16" | MS21045-06 | 5 | 99638A102 | 00000 | ||
| 8-32 | 11/32" | 1/4" | MS21045-08 | 5 | 99638A103 | 00000 | ||
| 10-32 | 3/8" | 1/4" | MS21045-3 | 5 | 99638A100 | 00000 | ||
| 1/4"-28 | 7/16" | 5/16" | MS21045-4 | 5 | 99638A200 | 00000 | ||
| 5/16"-24 | 1/2" | 23/64" | MS21045-5 | 5 | 99638A300 | 00000 | ||
| 3/8"-24 | 9/16" | 15/32" | MS21045-6 | 5 | 99638A400 | 00000 | ||
| 7/16"-20 | 11/16" | 15/32" | MS21045-7 | 1 | 99638A500 | 00000 | ||
| 1/2"-20 | 3/4" | 39/64" | MS21045-8 | 1 | 99638A600 | 00000 | ||
| 9/16"-18 | 7/8" | 11/16" | MS21045-9 | 1 | 99638A700 | 00000 | ||
| 5/8"-18 | 15/16" | 49/64" | MS21045-10 | 1 | 99638A800 | 00000 | ||
| 3/4"-16 | 1 1/16" | 57/64" | MS21045-12 | 1 | 99638A900 | 00000 | ||
Corrosion-Resistant Stainless Steel
Thread Size | Wd. | Ht. | Mil. Spec. | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
Silver-Plated 18-8 Stainless Steel | ||||||||
| 4-40 | 1/4" | 9/64" | MS21046C04, NASM21046 | 1 | 99851A101 | 000000 | ||
| 6-32 | 5/16" | 11/64" | MS21046C06, NASM21046 | 1 | 99851A102 | 00000 | ||
| 8-32 | 11/32" | 15/64" | MS21046C08, NASM21046 | 1 | 99851A103 | 0000 | ||
| 10-32 | 3/8" | 15/64" | MS21046C3, NASM21046 | 1 | 99851A104 | 00000 | ||
| 1/4"-28 | 7/16" | 9/32" | MS21046C4, NASM21046 | 1 | 99851A105 | 00000 | ||
| 3/8"-24 | 9/16" | 25/64" | MS21046C6, NASM21046 | 1 | 99851A106 | 00000 | ||
Low-Pressure Stainless Steel Threaded Pipe Locknuts
 |
Use these locknuts in a low-pressure pipe line.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
304 Stainless Steel—304 stainless steel locknuts have very good corrosion resistance.
316 Stainless Steel—316 stainless steel locknuts have excellent corrosion resistance.
ANSI/MSS SP-114—Locknuts that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking.
For Pipe | For Flange | 304 Stainless Steel | 316 Stainless Steel | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | For Use With | Pressure Class | Fabrication | Schedule | Material | Class | Material | Specs. Met | Each | Each | ||||
NPSL Female | ||||||||||||||||
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K581 | 00000 | ——— | 0 | ||
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K671 | 00000 | ||
| 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K582 | 0000 | ——— | 0 | ||
| 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K672 | 0000 | ||
| 3/8 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K583 | 00000 | ——— | 0 | ||
| 3/8 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K673 | 00000 | ||
| 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K584 | 00000 | ——— | 0 | ||
| 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K674 | 00000 | ||
| 3/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K585 | 00000 | ——— | 0 | ||
| 3/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K675 | 00000 | ||
| 1 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K586 | 00000 | ——— | 0 | ||
| 1 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K676 | 00000 | ||
| 1 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K587 | 00000 | ——— | 0 | ||
| 1 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K677 | 00000 | ||
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K588 | 00000 | ——— | 0 | ||
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K678 | 00000 | ||
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K589 | 00000 | ——— | 0 | ||
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K679 | 00000 | ||
| 2 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K591 | 00000 | ——— | 0 | ||
| 2 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K681 | 00000 | ||
| 3 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K592 | 00000 | ——— | 0 | ||
| 3 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K682 | 00000 | ||
| 4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 304 Stainless Steel, 304/304L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | 4464K593 | 00000 | ——— | 0 | ||
| 4 | 300 psi @ 72° F | 150 psi @ 350° F | Air, Natural Gas, Oil, Steam, Water | 150 | Heat Treated | 40 | 316 Stainless Steel, 316/316L Stainless Steel | 150 | 304 Stainless Steel, 304/304L Stainless Steel | ANSI/MSS SP-114, ASTM A351 | ——— | 0 | 4452K683 | 00000 | ||
Mil. Spec. Thin-Profile Nylon-Insert Locknuts
 |
These locknuts are manufactured and tested to strict U.S. military standards for material and construction. They are about half the height of standard-profile locknuts to fit in spaces with low clearance. You can also use them as jam nuts by threading them against a hex nut to hold it in place. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Low-Strength Steel
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
Cadmium Yellow-Chromate-Plated Steel | |||||||||
| 4-40 | 1/4" | 1/8" | MS21083N04, NASM21083 | 250 | 10 | 95496A310 | 000000 | ||
| 6-32 | 5/16" | 9/64" | MS21083N06, NASM21083 | 250 | 10 | 95496A320 | 00000 | ||
| 8-32 | 11/32" | 3/16" | MS21083N08, NASM21083 | 250 | 10 | 95496A330 | 0000 | ||
| 10-32 | 3/8" | 3/16" | MS21083N3, NASM21083 | 250 | 10 | 95496A340 | 0000 | ||
| 1/4"-28 | 7/16" | 7/32" | MS21083N4, NASM21083 | 250 | 10 | 95496A350 | 0000 | ||
| 1/2"-20 | 3/4" | 5/16" | MS21083N8, NASM21083 | 250 | 1 | 95496A380 | 0000 | ||
Corrosion-Resistant Stainless Steel
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 2-56 | 1/4" | 7/64" | MS21083C02, NASM21083 | 250 | 5 | 97231A480 | 000000 | ||
| 4-40 | 1/4" | 1/8" | MS21083C04, NASM21083 | 250 | 10 | 97231A410 | 00000 | ||
| 6-32 | 5/16" | 9/64" | MS21083C06, NASM21083 | 250 | 10 | 97231A420 | 00000 | ||
| 8-32 | 11/32" | 3/16" | MS21083C08, NASM21083 | 250 | 5 | 97231A430 | 0000 | ||
| 10-32 | 3/8" | 3/16" | MS21083C3, NASM21083 | 250 | 5 | 97231A440 | 00000 | ||
| 1/4"-28 | 7/16" | 7/32" | MS21083C4, NASM21083 | 250 | 5 | 97231A450 | 00000 | ||
| 5/16"-24 | 1/2" | 17/64" | MS21083C5, NASM21083 | 250 | 1 | 97231A460 | 0000 | ||
| 3/8"-24 | 9/16" | 9/32" | MS21083C6, NASM21083 | 250 | 1 | 97231A470 | 0000 | ||
| 7/16"-20 | 11/16" | 21/64" | MS21083C7, NASM21083 | 250 | 1 | 97231A510 | 00000 | ||
| 1/2"-20 | 3/4" | 5/16" | MS21083C8, NASM21083 | 250 | 1 | 97231A490 | 00000 | ||
| 5/8"-18 | 15/16" | 13/32" | MS21083C10, NASM21083 | 250 | 1 | 97231A520 | 00000 | ||
Inch-to-Inch Male-Female Hex Thread Adapters
 |  |
Change thread sizes or types, such as fine to coarse threads, on parts without changing gender. These adapters can also be used as standoffs to position components in assemblies and to create space between parts. They have an external hex, so you can tighten them with a wrench.
ASTM A582—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.
NAS1829AC3B08, NAS1829AC4D08, NAS1829AC6F08, NAS1829AC6H12, NAS1829C3B08, NAS1829C4D08, NAS1829C6F08, and NAS1829C6H12—Adapters that meet NAS standards are made to specific dimensions and are finished with an extra layer of rust protection. Aluminum adapters that meet NAS standards have a yellow-chromate plating, and stainless steel adapters have been passivated.
Thread Lg. | Gender | Thread Fit | Hex | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size (A) | Thread Size (B) | (A) | (B) | (A) | (B) | (A) | (B) | Size | Length | Specs. Met | Mil. Spec. | Tensile Strength, psi | Hardness | Each | |||
Zinc-Yellow-Chromate-Plated Aluminum | |||||||||||||||||
| 4-40 | 2-56 | 3/16" | 3/16" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/16" | 1/2" | — | NAS1829AC3B08 | 45,000 | Rockwell B56 | 91156A176 | 00000 | ||
| 6-32 | 4-40 | 1/4" | 1/4" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 1/4" | 1/2" | — | NAS1829AC4D08 | 45,000 | Rockwell B56 | 91156A177 | 0000 | ||
| 8-32 | 6-32 | 3/8" | 3/8" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/8" | 1/2" | — | NAS1829AC6F08 | 45,000 | Rockwell B56 | 91156A178 | 0000 | ||
| 10-32 | 8-32 | 3/8" | 7/16" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/8" | 3/4" | — | NAS1829AC6H12 | 45,000 | Rockwell B56 | 91156A179 | 0000 | ||
Passivated 18-8 Stainless Steel | |||||||||||||||||
| 4-40 | 2-56 | 3/16" | 3/16" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/16" | 1/2" | ASTM A582 | NAS1829C3B08 | 85,000 | Rockwell B80 | 91159A115 | 0000 | ||
| 6-32 | 4-40 | 1/4" | 1/4" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 1/4" | 1/2" | ASTM A582 | NAS1829C4D08 | 85,000 | Rockwell B80 | 91159A116 | 0000 | ||
| 8-32 | 6-32 | 3/8" | 3/8" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/8" | 1/2" | ASTM A582 | NAS1829C6F08 | 85,000 | Rockwell B80 | 91159A117 | 0000 | ||
| 10-32 | 8-32 | 3/8" | 7/16" | Male | Female | Unified Standard Class 2A | Unified Standard Class 2B | 3/8" | 3/4" | ASTM A582 | NAS1829C6H12 | 85,000 | Rockwell B80 | 91159A118 | 0000 | ||
