721502-1

View detailed technical data, stock status, and sourcing information for: 721502-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-185-4656

Item Name Code

01857

Assigment Date

07/29/1984 (42 years ago)

A nut, flat on top and bottom, having 4 flat sides. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

right-hand thread direction, hexagon nut style, 0.500 inches nominal nut height, 0.250 inches nominal width across flats, 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
Nut Style: hexagon
Nut Height: 0.500 inches nominal
Width Across Flats: 0.250 inches nominal
Thread Series: unc
Thread Quantity Per Inch: 40
Nominal Thread Size: 0.112 inches
Bearing Surface Type: flat
Material: steel comp 1018 overall
Material Document And Classification: astm a108 assn std 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

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-01-050-9956	No Name Available	09/01/2013

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
2078927-1	Hexagon Plain Nut
721502-1	Hexagon Plain Nut
PR-379-1	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-185-4656?

The FSCG of the NSN 5310-01-185-4656 is 5310

Does the NSN 5310-01-185-4656 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-185-4656 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 5310-01-185-4656 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-185-4656 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 5310-01-185-4656 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Sun, Jul 29, 1984