5/8-11UNC-3B, C L B

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-004-6946

Item Name Code

05277

Assigment Date

05/29/1975 (51 years ago)

3b thread class, hexagon nut style, right-hand thread direction, prevailing torque with nonmetallic insert locking feature, 0.732 inches minimum and 0.766 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
Locking Feature: prevailing torque with nonmetallic insert
Nut Style: hexagon
Nut Height: 0.732 inches minimum and 0.766 inches maximum
Width Across Flats: 0.928 inches minimum and 0.944 inches maximum
Temp Rating: 250.0 fahrenheit nominal
Thread Series: unc
Thread Quantity Per Inch: 11
Nominal Thread Size: 0.625 inches
Countersink Angle: 88.0 degrees nominal nut
Bearing Surface Type: chamfered or washer faced
Bearing Surface Finish: 125.0 microinches
Material: nickel alloy 400 or nickel alloy r-405 nut
Material: plastic polyhexamethylene amide locking insert
Material Document And Classification: astm d4066,comp a,type 1 assn std single material response locking insert

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-01-023-7622	No Name Available	02/01/1991
5310-01-203-2580	No Name Available	03/01/1989
5310-01-353-3635	No Name Available	04/01/1995
5310-01-449-1924	No Name Available	11/01/1998

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
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837-0625-320	Hexagon Self-Locking Nut
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FAQs

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

What is the FSCG of the NSN 5310-01-004-6946?

The FSCG of the NSN 5310-01-004-6946 is 5310

Does the NSN 5310-01-004-6946 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5310-01-004-6946 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 5310-01-004-6946 contain precious materials?

Precious metal content is unknown

Does NSN 5310-01-004-6946 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 5310-01-004-6946 was assigned to the Federal Catalog?

It was assigned 51 years ago, on Thu, May 29, 1975