21FA616

View detailed technical data, stock status, and sourcing information for: 21FA616
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-006-0624

Item Name Code

05277

Assigment Date

06/19/1972 (54 years ago)

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes:nut (1), self-locking, cap.

0.364 inches minimum and 0.384 inches maximum nut height, 2b thread class, prevailing torque all metal design locking feature, hexagon nut style, right-hand thread direction

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
Locking Feature: prevailing torque all metal design
Nut Style: hexagon
Nut Height: 0.364 inches minimum and 0.384 inches maximum
Width Across Flats: 0.616 inches minimum and 0.627 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unc
Thread Quantity Per Inch: 16
Nominal Thread Size: 0.375 inches
Bearing Surface Type: chamfered
Material: steel overall
Surface Treatment: cadmium overall
Special Test Features: special quality control testing
Test Data Document: "81349-mil-p-23199 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Reference Number Differentiating Characteristics: material must conform to ships parts control center special quality control provisions

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
21FA616	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-006-0624?

The FSCG of the NSN 5310-00-006-0624 is 5310

Does the NSN 5310-00-006-0624 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-006-0624 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 5310-00-006-0624 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-006-0624 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 5310-00-006-0624 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Mon, Jun 19, 1972