21AX761

View detailed technical data, stock status, and sourcing information for: 21AX761
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-552-7995

Item Name Code

04889

Assigment Date

06/25/2007 (19 years ago)

A deformable material which prevents the passage of matter through the joint formed when two faces are joined. It may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. It may be made to any predetermined dimension and shape. Excludes:flat disks, items made of felt material and items having joints. For round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. Excludes:disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.

right-hand thread direction, hexagon nut style, 0.790 inches minimum and 0.820 inches maximum washer outside diameter, 0.318 inches minimum and 0.342 inches maximum overall height, 2b thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2b
Thread Direction: right-hand
Washer Outside Diameter: 0.790 inches minimum and 0.820 inches maximum
Overall Height: 0.318 inches minimum and 0.342 inches maximum
Nut Style: hexagon
Washer Thickness: 0.036 inches minimum and 0.050 inches maximum
Width Across Flats: 0.489 inches minimum and 0.500 inches maximum
Thread Series: unf
Thread Quantity Per Inch: 24
Nominal Thread Size: 0.3125 inches
Part Name Assigned By Controlling Agency: nut, lock-machine screw hex serrated large washer head
Special Features: finish:zinc chromate; typical useage:sheet metal fasteners
Surface Treatment: chromate zinc overall

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
21AX761	Nut,plain,extended Washer,hexago
25097981	Nut,plain,extended Washer,hexago

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-01-552-7995?

The FSCG of the NSN 5310-01-552-7995 is 5310

Does NSN 5310-01-552-7995 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-01-552-7995 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-552-7995 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-01-552-7995 was assigned to the Federal Catalog?

It was assigned 19 years ago, on Mon, Jun 25, 2007