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Lubrication
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.
Corrosion-Resistant Stainless Steel
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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 | ||
12-Point-Drive Flange Nuts
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Corrosion-Resistant Stainless Steel
Flange | ||||||||
|---|---|---|---|---|---|---|---|---|
Thread Size | Wd. | Ht. | Dia. | Thk. | Each | |||
High-Temperature A286 Stainless Steel | ||||||||
| 1/4"-20 | 5/16" | 19/64" | 7/16" | 0.06" | 90997A700 | 00000 | ||
| 1/4"-28 | 5/16" | 19/64" | 7/16" | 0.06" | 90997A750 | 0000 | ||
| 5/16"-18 | 3/8" | 11/32" | 17/32" | 0.08" | 90997A800 | 0000 | ||
| 5/16"-24 | 3/8" | 11/32" | 17/32" | 0.08" | 90997A850 | 0000 | ||
| 3/8"-16 | 7/16" | 25/64" | 5/8" | 0.09" | 90997A900 | 0000 | ||
| 3/8"-24 | 7/16" | 25/64" | 5/8" | 0.09" | 90997A950 | 0000 | ||
| 7/16"-14 | 1/2" | 7/16" | 45/64" | 0.11" | 90997A951 | 0000 | ||
| 7/16"-20 | 1/2" | 7/16" | 45/64" | 0.11" | 90997A952 | 0000 | ||
| 1/2"-13 | 9/16" | 33/64" | 53/64" | 0.13" | 90997A953 | 0000 | ||
| 1/2"-20 | 9/16" | 33/64" | 53/64" | 0.13" | 90997A954 | 0000 | ||
| 9/16"-18 | 11/16" | 5/8" | 31/32" | 0.13" | 90997A110 | 0000 | ||
| M6 × 1 mm | 8 mm | 6.1 mm | 10.5 mm | 1.6 mm | 90997A210 | 0000 | ||
| M7 × 1 mm | 9 mm | 7 mm | 12 mm | 1.6 mm | 90997A220 | 0000 | ||
| M8 × 1 mm | 10 mm | 8.1 mm | 15.9 mm | 1.6 mm | 90997A230 | 0000 | ||
| M8 × 1.25 mm | 10 mm | 8.1 mm | 13.6 mm | 1.6 mm | 90997A240 | 0000 | ||
| M9 × 1 mm | 11 mm | 9.5 mm | 15.6 mm | 1.6 mm | 90997A250 | 0000 | ||
| M10 × 1 mm | 12 mm | 10.2 mm | 17.8 mm | 3.2 mm | 90997A260 | 0000 | ||
| M10 × 1.25 mm | 12 mm | 10.2 mm | 17.8 mm | 3.2 mm | 90997A270 | 0000 | ||
| M10 × 1.5 mm | 12 mm | 10.2 mm | 17.8 mm | 3.2 mm | 90997A280 | 0000 | ||
| M11 × 1.25 mm | 13 mm | 11 mm | 17.8 mm | 3.2 mm | 90997A290 | 0000 | ||
| M11 × 1.25 mm | 14 mm | 13 mm | 20.9 mm | 3.2 mm | 90997A310 | 0000 | ||
| M12 × 1 mm | 14 mm | 12.8 mm | 19.1 mm | 3.2 mm | 90997A320 | 0000 | ||
| M12 × 1.25 mm | 14 mm | 12.8 mm | 19.1 mm | 3.2 mm | 90997A340 | 0000 | ||
| M12 × 1.25 mm | 14 mm | 12.8 mm | 20.9 mm | 3.2 mm | 90997A330 | 0000 | ||
| M12 × 1.75 mm | 14 mm | 12.8 mm | 20.9 mm | 3.2 mm | 90997A350 | 0000 | ||
Mil. Spec. Rivet-Mount Nuts
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Create threads in hard-to-work areas—where you can’t reach the back of a workpiece, or material is too thin to be tapped. For a strong grip, these rivet-mount nuts have distorted threads that increase friction with bolts. Because they mount with two rivets, they won’t spin when you’re tightening screws. However, these nuts do move inside their retainers, which lets you install bolts at a slight angle; use them to align with off-center parts. All meet military guidelines for dimensions and material.
A286 Stainless Steel—A286 stainless steel nuts are corrosion resistant.
Silver-Plated A286 Stainless Steel—Silver-plated stainless steel nuts withstand temperatures up to 800° F. The silver plating also adds lubricity and prevents seizing caused by friction between nuts and bolts.
Lubricated—Lubricated nuts thread onto bolts smoothly.
Base | Barrel | Mounting | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Wd. | Thk. | Dia. | Ht. | No. of Holes | Hole Dia. | Hole Ctr.-to-Ctr. | Mil. Spec. | Each | |||
A286 Stainless Steel—Lubricated | |||||||||||||
| 4-40 | 21/32" | 5/16" | 3/32" | 1/8" | 1/16" | 2 | 0.098" | 13/32" | MS21076L04N | 90857A141 | 000000 | ||
| 6-32 | 11/16" | 11/32" | 3/32" | 0.172" | 5/64" | 2 | 0.098" | 7/16" | MS21076L06N | 90857A142 | 00000 | ||
| 6-32 | 61/64" | 13/32" | 1/32" | 0.172" | 11/64" | 2 | 0.098" | 11/16" | MS21060L06 | 90857A120 | 00000 | ||
| 8-32 | 45/64" | 23/64" | 3/32" | 0.203" | 5/32" | 2 | 0.098" | 15/32" | MS21076L08N | 90857A143 | 0000 | ||
| 8-32 | 61/64" | 13/32" | 1/32" | 0.203" | 7/32" | 2 | 0.098" | 11/16" | MS21060L08 | 90857A121 | 0000 | ||
| 10-32 | 47/64" | 13/32" | 3/32" | 0.234" | 5/32" | 2 | 0.098" | 1/2" | MS21076L3N | 90857A144 | 0000 | ||
| 10-32 | 61/64" | 13/32" | 1/32" | 0.234" | 7/32" | 2 | 0.098" | 11/16" | MS21060L3 | 90857A122 | 0000 | ||
| 1/4"-28 | 51/64" | 1/2" | 3/32" | 0.313" | 3/16" | 2 | 0.098" | 9/16" | MS21076L4N | 90857A145 | 0000 | ||
| 1/4"-28 | 1 19/64" | 33/64" | 1/32" | 0.313" | 1/4" | 2 | 0.098" | 1" | MS21060L4 | 90857A123 | 00000 | ||
| 5/16"-24 | 1 1/64" | 37/64" | 7/64" | 0.391" | 7/32" | 2 | 0.13" | 23/32" | MS21076L5N | 90857A146 | 00000 | ||
| 5/16"-24 | 1 19/64" | 39/64" | 3/64" | 3/8" | 9/32" | 2 | 0.13" | 1" | MS21060L5 | 90857A124 | 00000 | ||
| 3/8"-24 | 1 19/64" | 43/64" | 1/16" | 0.453" | 19/64" | 2 | 0.13" | 1" | MS21060L6 | 90857A125 | 00000 | ||
Silver-Plated A286 Stainless Steel—Unlubricated | |||||||||||||
| 4-40 | 21/32" | 5/16" | 3/32" | 1/8" | 1/16" | 2 | 0.098" | 13/32" | MS21076-04N | 90857A136 | 00000 | ||
| 6-32 | 61/64" | 13/32" | 1/32" | 0.172" | 11/64" | 2 | 0.098" | 11/16" | MS21060-06 | 90857A114 | 00000 | ||
| 8-32 | 45/64" | 23/64" | 3/32" | 0.203" | 5/32" | 2 | 0.098" | 15/32" | MS21076-08N | 90857A137 | 00000 | ||
| 10-32 | 47/64" | 13/32" | 3/32" | 0.234" | 5/32" | 2 | 0.098" | 1/2" | MS21076-3N | 90857A138 | 0000 | ||
| 10-32 | 61/64" | 13/32" | 1/32" | 0.234" | 7/32" | 2 | 0.098" | 11/16" | MS21060-3 | 90857A116 | 0000 | ||
| 1/4"-28 | 51/64" | 1/2" | 3/32" | 0.313" | 3/16" | 2 | 0.098" | 9/16" | MS21076-4N | 90857A139 | 00000 | ||
| 1/4"-28 | 1 19/64" | 33/64" | 1/32" | 0.313" | 1/4" | 2 | 0.098" | 1" | MS21060-4 | 90857A117 | 00000 | ||
| 5/16"-24 | 1 1/64" | 37/64" | 7/64" | 0.391" | 7/32" | 2 | 0.13" | 23/32" | MS21076-5N | 90857A140 | 00000 | ||
