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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
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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 Silver-Plated A286 Stainless Steel | |||||||||||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21043-04 | Material Certificate | 5 | 98892A100 | 000000 | ||
| 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. Flex-Top Locknuts for Heavy Vibration
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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 | ||
