403B1

View detailed technical data, stock status, and sourcing information for: 403B1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-737-3353

Item Name Code

13393

Assigment Date

01/01/1963 (63 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.

0.057 inches minimum and 0.067 inches maximum thickness, 0.323 inches minimum and 0.333 inches maximum hole diameter, round peripheral shape style, round center hole shape style, rectangular cross-sectional shape style

Product Characteristics

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

Cross-Sectional Shape Style: rectangular
Hole Diameter: 0.323 inches minimum and 0.333 inches maximum
Peripheral Shape Style: round
Center Hole Shape Style: round
Thickness: 0.057 inches minimum and 0.067 inches maximum
Overall Diameter: 0.620 inches minimum and 0.630 inches maximum
Heat Treatment: cold rolled
Material: steel comp 1010 overall
Material Document And Classification: sae assn std single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-654-2334	No Name Available	01/01/1963

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
403B1	Flat Washer
7373353	Flat Washer
R21210	Flat Washer
W300119	Flat Washer

FAQs

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

What is the FSCG of the NSN 5310-00-737-3353?

The FSCG of the NSN 5310-00-737-3353 is 5310

Does the NSN 5310-00-737-3353 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-00-737-3353 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 5310-00-737-3353 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-737-3353 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 5310-00-737-3353 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963