643449

View detailed technical data, stock status, and sourcing information for: 643449
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-274-7731

Item Name Code

01854

Assigment Date

01/01/1961 (65 years ago)

right-hand thread direction, 0.612 inches minimum and 0.625 inches maximum width across flats, 3b thread class, castellated, hexagon nut style, 0.448 inches minimum and 0.458 inches maximum nut height

Product Characteristics

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

Thread Class: 3b
Thread Direction: right-hand
Nut Style: castellated, hexagon
Nut Height: 0.448 inches minimum and 0.458 inches maximum
Width Across Flats: 0.612 inches minimum and 0.625 inches maximum
Thread Series: unf
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.438 inches
Bearing Surface Type: washer faced
Material: steel comp 3140 or steel comp 2330 or steel comp 4135 or steel comp 4140 or steel comp 4037 overall
Material Document And Classification: sae assn std 1st material response or sae assn std 2nd material response or sae assn std 3rd material response or sae assn std 4th material response or aisi assn std 5th material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-145-1349	No Name Available	01/01/1963
5310-00-275-0355	No Name Available	01/01/1963
5310-00-362-8384	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
1A9673	Nut,plain,castellated,hexagon
21056	Nut,plain,castellated,hexagon
21056A	Nut,plain,castellated,hexagon
272071	Nut,plain,castellated,hexagon
643449	Nut,plain,castellated,hexagon
6D07	Nut,plain,castellated,hexagon
72MBS1	Nut,plain,castellated,hexagon
904322	Nut,plain,castellated,hexagon
HM21056A	Nut,plain,castellated,hexagon
L12161	Nut,plain,castellated,hexagon

FAQs

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

What is the FSCG of the NSN 5310-00-274-7731?

The FSCG of the NSN 5310-00-274-7731 is 5310

Does the NSN 5310-00-274-7731 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-274-7731 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 5310-00-274-7731 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-274-7731 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 5310-00-274-7731 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961