1/4-20UNC

View detailed technical data, stock status, and sourcing information for: 1/4-20UNC
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-423-6660

Item Name Code

01857

Assigment Date

01/05/1996 (30 years ago)

A tubular item, so formed as to provide a spring action against the inside wall of a hole when driven into abutting pieces to position and hold them in place.

20 thread quantity per inch, 2b thread class, unc thread series, right-hand thread direction, 0.250 inches nominal thread size

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
Thread Series: unc
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.250 inches
Bearing Surface Type: chamfered or washer faced
Material: nickel alloy 400 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
1/4-20UNC	Hexagon Plain Nut
C1076 REV B PIECE NO.88	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-423-6660?

The FSCG of the NSN 5310-01-423-6660 is 5310

Does the NSN 5310-01-423-6660 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5310-01-423-6660 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 5310-01-423-6660 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-423-6660 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 5310-01-423-6660 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Fri, Jan 5, 1996