MS21299-4

View detailed technical data, stock status, and sourcing information for: MS21299-4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-121-8521

Item Name Code

13393

Assigment Date

11/10/1981 (44 years ago)

0.251 inches minimum and 0.255 inches maximum hole diameter, 0.052 inches minimum and 0.072 inches maximum thickness, rectangular cross-sectional shape style, round peripheral shape style, round center hole 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: 0.251 inches minimum and 0.255 inches maximum
Peripheral Shape Style: round
Center Hole Shape Style: round
Thickness: 0.052 inches minimum and 0.072 inches maximum
Overall Diameter: 0.481 inches minimum and 0.491 inches maximum
Hardness Rating: 39.0 rockwell c minimum and 45.0 rockwell c maximum
Material: steel comp 4130 overall
Material Document And Classification: mil-s-6758 mil spec single material response or mil-s-18729 mil spec single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed spec single treatment response 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
5310PL1576293	Flat Washer
MS21299-4	Flat Washer

FAQs

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

What is the FSCG of the NSN 5310-01-121-8521?

The FSCG of the NSN 5310-01-121-8521 is 5310

Does the NSN 5310-01-121-8521 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-01-121-8521 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 5310-01-121-8521 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-121-8521 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 5310-01-121-8521 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Tue, Nov 10, 1981