5340-01-421-7521

Find complete technical information, availability, and procurement data for: 5340-01-421-7521
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-01-421-7521

Item Name Code

40280

Assigment Date

11/15/1995 (30 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.

0.312 inches nominal length, right-hand left internal (includes thru thread) thread direction, 0.281 inches nominal diameter, 2b left internal (includes thru thread) thread class, 0.312 inches nominal left internal (includes thru thread) thread length

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 left internal (includes thru thread)
Thread Direction: right-hand left internal (includes thru thread)
Thread Length: 0.312 inches nominal left internal (includes thru thread)
Diameter: 0.281 inches nominal
Length: 0.312 inches nominal
Cross-Sectional Shape: round
Thread Quantity Per Inch: 32 left internal (includes thru thread)
Nominal Thread Size: 0.138 inches left internal (includes thru thread)
Right Projection Length: 0.105 inches nominal
Material: copper alloy 360 overall
Material Document And Classification: astm b16 assn std single material response overall
Surface Treatment: tin overall
Surface Treatment Document And Classification: mil-t-10727 ty 1 mil spec single treatment response overall
Style Designator: projection one end left internal thread
Thread Series Designator: unc left internal (includes thru thread)

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
18124B-B-0632-14	Spacing Threaded Standoff
KKJ2900PC4	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-01-421-7521?

The FSCG of the NSN 5340-01-421-7521 is 5340

Does NSN 5340-01-421-7521 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 5340-01-421-7521 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-01-421-7521 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5340-01-421-7521 was assigned to the Federal Catalog?

It was assigned 30 years ago, on Wed, Nov 15, 1995