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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
 |
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 | ||
Press-Fit Nuts for Sheet Metal
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Add permanent threads to thin panels in seconds. The knurls on these clinch-style nuts deform and grip sheet metal to create a permanent hold. Push them into a drilled or punched hole with an arbor press around your workpiece to install—no messy welding required.
High-Temperature High-Strength A286 Stainless Steel—Our strongest press-fit nuts are hard enough to install in stainless steel panels. They also withstand temperatures up to 1150° F and resist corrosion from chemicals such as bleach and chlorine.
Head | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Drill Bit Size | For Min. Panel Thk. | For Maximum Panel Hardness | OD | Ht. | PEM® Part No. | Head Shape | Pkg. Qty. | Pkg. | |||
High-Temperature High-Strength A286 Stainless Steel | ||||||||||||
| 2-56 | 29 Ga. | 0.025" | Brinell 192, Rockwell B90 | 0.22" | 0.065" | SMPP-256 | Round | 10 | 92002A110 | 00000 | ||
| 2-56 | 19 Ga. | 0.03" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-256-0 | Round | 10 | 92002A170 | 0000 | ||
| 2-56 | 19 Ga. | 0.04" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-256-1 | Round | 10 | 92002A180 | 0000 | ||
| 2-56 | 19 Ga. | 0.056" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-256-2 | Round | 10 | 92002A190 | 0000 | ||
| 4-40 | 19 Ga. | 0.025" | Brinell 192, Rockwell B90 | 0.22" | 0.065" | SMPP-440 | Round | 10 | 92002A120 | 0000 | ||
| 4-40 | 19 Ga. | 0.03" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-440-0 | Round | 10 | 92002A210 | 0000 | ||
| 4-40 | 19 Ga. | 0.04" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-440-1 | Round | 10 | 92002A220 | 0000 | ||
| 4-40 | 19 Ga. | 0.056" | Brinell 192, Rockwell B90 | 0.25" | 0.07" | SP-440-2 | Round | 10 | 92002A230 | 0000 | ||
| 6-32 | 3/16" | 0.03" | Brinell 192, Rockwell B90 | 0.28" | 0.07" | SP-632-0 | Round | 10 | 92002A240 | 0000 | ||
| 6-32 | 3/16" | 0.04" | Brinell 192, Rockwell B90 | 0.28" | 0.07" | SP-632-1 | Round | 10 | 92002A250 | 0000 | ||
| 6-32 | 3/16" | 0.056" | Brinell 192, Rockwell B90 | 0.28" | 0.07" | SP-632-2 | Round | 10 | 92002A260 | 0000 | ||
| 6-32 | 12 Ga. | 0.025" | Brinell 192, Rockwell B90 | 0.252" | 0.065" | SMPP-632 | Round | 10 | 92002A130 | 0000 | ||
| 8-32 | 3 Ga. | 0.03" | Brinell 192, Rockwell B90 | 0.31" | 0.09" | SP-832-0 | Round | 5 | 92002A270 | 0000 | ||
| 8-32 | 3 Ga. | 0.04" | Brinell 192, Rockwell B90 | 0.31" | 0.09" | SP-832-1 | Round | 5 | 92002A280 | 0000 | ||
| 8-32 | 3 Ga. | 0.056" | Brinell 192, Rockwell B90 | 0.31" | 0.09" | SP-832-2 | Round | 5 | 92002A290 | 0000 | ||
| 10-24 | 1/4" | 0.03" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-024-0 | Round | 5 | 92002A310 | 0000 | ||
| 10-24 | 1/4" | 0.04" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-024-1 | Round | 5 | 92002A320 | 0000 | ||
| 10-24 | 1/4" | 0.056" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-024-2 | Round | 5 | 92002A330 | 0000 | ||
| 10-32 | 1/4" | 0.03" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-032-0 | Round | 5 | 92002A340 | 0000 | ||
| 10-32 | 1/4" | 0.04" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-032-1 | Round | 5 | 92002A350 | 0000 | ||
| 10-32 | 1/4" | 0.056" | Brinell 192, Rockwell B90 | 0.34" | 0.09" | SP-032-2 | Round | 5 | 92002A360 | 0000 | ||
| 1/4"-20 | 11/32" | 0.047" | Brinell 192, Rockwell B90 | 0.44" | 0.17" | SP-0420-0 | Round | 1 | 92002A370 | 0000 | ||
| 1/4"-20 | 11/32" | 0.056" | Brinell 192, Rockwell B90 | 0.44" | 0.17" | SP-0420-1 | Round | 1 | 92002A380 | 0000 | ||
| 1/4"-20 | 11/32" | 0.09" | Brinell 192, Rockwell B90 | 0.44" | 0.17" | SP-0420-2 | Round | 1 | 92002A390 | 0000 | ||
| 5/16"-18 | Z | 0.056" | Brinell 192, Rockwell B90 | 0.5" | 0.23" | SP-0518-1 | Round | 1 | 92002A410 | 0000 | ||
| 5/16"-18 | Z | 0.09" | Brinell 192, Rockwell B90 | 0.5" | 0.23" | SP-0518-2 | Round | 1 | 92002A420 | 0000 | ||
| 3/8"-16 | 1/2" | 0.09" | Brinell 192, Rockwell B90 | 0.56" | 0.27" | SP-0616-1 | Round | 1 | 92002A430 | 0000 | ||
| 3/8"-16 | 1/2" | 0.125" | Brinell 192, Rockwell B90 | 0.56" | 0.27" | SP-0616-2 | Round | 1 | 92002A440 | 0000 | ||
| M2 x 0.4 mm | 4.2 mm | 1 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M2-1 | Round | 5 | 92002A450 | 0000 | ||
| M2 x 0.4 mm | 4.2 mm | 1.4 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M2-2 | Round | 5 | 92002A460 | 0000 | ||
| M2.5 x 0.45 mm | 3.8 mm | 0.64 mm | Brinell 192, Rockwell B90 | 5.6 mm | 1.4 mm | SMPP-M2.5 | Round | 10 | 92002A140 | 0000 | ||
| M2.5 x 0.45 mm | 4.2 mm | 0.8 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M2.5-0 | Round | 5 | 92002A470 | 0000 | ||
| M2.5 x 0.45 mm | 4.2 mm | 1 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M2.5-1 | Round | 5 | 92002A480 | 0000 | ||
| M2.5 x 0.45 mm | 4.2 mm | 1.4 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M2.5-2 | Round | 5 | 92002A490 | 0000 | ||
| M3 x 0.5 mm | 4.2 mm | 0.64 mm | Brinell 192, Rockwell B90 | 5.6 mm | 1.4 mm | SMPP-M3 | Round | 10 | 92002A150 | 0000 | ||
| M3 x 0.5 mm | 4.2 mm | 0.8 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M3-0 | Round | 10 | 92002A510 | 0000 | ||
| M3 x 0.5 mm | 4.2 mm | 1 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M3-1 | Round | 10 | 92002A520 | 0000 | ||
| M3 x 0.5 mm | 4.2 mm | 1.4 mm | Brinell 192, Rockwell B90 | 6.35 mm | 1.5 mm | SP-M3-2 | Round | 10 | 92002A530 | 0000 | ||
| M3.5 x 0.6 mm | 4.8 mm | 0.64 mm | Brinell 192, Rockwell B90 | 6.4 mm | 1.4 mm | SMPP-M3.5 | Round | 10 | 92002A160 | 0000 | ||
| M4 x 0.7 mm | 5.4 mm | 0.8 mm | Brinell 192, Rockwell B90 | 7.87 mm | 2 mm | SP-M4-0 | Round | 5 | 92002A540 | 0000 | ||
| M4 x 0.7 mm | 5.4 mm | 1 mm | Brinell 192, Rockwell B90 | 7.87 mm | 2 mm | SP-M4-1 | Round | 5 | 92002A550 | 0000 | ||
| M4 x 0.7 mm | 5.4 mm | 1.4 mm | Brinell 192, Rockwell B90 | 7.87 mm | 2 mm | SP-M4-2 | Round | 5 | 92002A560 | 0000 | ||
| M5 x 0.8 mm | 6.4 mm | 0.8 mm | Brinell 192, Rockwell B90 | 8.64 mm | 2 mm | SP-M5-0 | Round | 5 | 92002A570 | 0000 | ||
| M5 x 0.8 mm | 6.4 mm | 1 mm | Brinell 192, Rockwell B90 | 8.64 mm | 2 mm | SP-M5-1 | Round | 5 | 92002A580 | 0000 | ||
| M5 x 0.8 mm | 6.4 mm | 1.4 mm | Brinell 192, Rockwell B90 | 8.64 mm | 2 mm | SP-M5-2 | Round | 5 | 92002A590 | 0000 | ||
| M6 x 1 mm | 8.8 mm | 1.4 mm | Brinell 192, Rockwell B90 | 11.18 mm | 4.08 mm | SP-M6-1 | Round | 1 | 92002A610 | 0000 | ||
| M6 x 1 mm | 8.8 mm | 2.29 mm | Brinell 192, Rockwell B90 | 11.18 mm | 4.08 mm | SP-M6-2 | Round | 1 | 92002A620 | 0000 | ||
| M8 x 1.25 mm | 10.5 mm | 1.4 mm | Brinell 192, Rockwell B90 | 12.7 mm | 5.47 mm | SP-M8-1 | Round | 1 | 92002A630 | 0000 | ||
| M8 x 1.25 mm | 10.5 mm | 2.29 mm | Brinell 192, Rockwell B90 | 12.7 mm | 5.47 mm | SP-M8-2 | Round | 1 | 92002A640 | 0000 | ||
| M10 x 1.5 mm | 14 mm | 2.29 mm | Brinell 192, Rockwell B90 | 17.35 mm | 7.48 mm | SP-M10-1 | Round | 1 | 92002A650 | 0000 | ||
