5310-01-256-9731

Find complete technical information, availability, and procurement data for: 5310-01-256-9731
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-256-9731

Item Name Code

14218

Assigment Date

06/10/1987 (39 years ago)

A washer having a centrally located hole and two flat bearing surfaces which are not parallel.

steel comp 1050 or steel comp 1551 or steel comp 1552 or steel comp 1053 or steel comp 1054 or steel comp 1055 or steel comp 1059 or steel comp 1060 or steel comp 1561 or steel comp 1062 or steel comp 1064 overall material, 89.0 rockwell b minimum and 94.0 rockwell b maximum hardness rating, 0.020 inches minimum and 0.025 inches maximum material thickness, 0.365 inches minimum and 0.381 inches maximum outside diameter, 0.195 inches minimum and 0.204 inches maximum hole diameter

Product Characteristics

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

Hole Diameter: 0.195 inches minimum and 0.204 inches maximum
Outside Diameter: 0.365 inches minimum and 0.381 inches maximum
Material Thickness: 0.020 inches minimum and 0.025 inches maximum
Hardness Rating: 89.0 rockwell b minimum and 94.0 rockwell b maximum
Material: steel comp 1050 or steel comp 1551 or steel comp 1552 or steel comp 1053 or steel comp 1054 or steel comp 1055 or steel comp 1059 or steel comp 1060 or steel comp 1561 or steel comp 1062 or steel comp 1064 overall
Material Document And Classification: 66 fed std all material responses overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: astm b633 type 2 assn std single treatment response overall
Style Designator: flat internal teeth

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
MS51413-4	Lock Washer

FAQs

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

What is the FSCG of the NSN 5310-01-256-9731?

The FSCG of the NSN 5310-01-256-9731 is 5310

Does the NSN 5310-01-256-9731 have a Schedule B code assigned?

Yes, the Schedule B code is 7318210000

Does NSN 5310-01-256-9731 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 5310-01-256-9731 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-256-9731 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 5310-01-256-9731 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Wed, Jun 10, 1987