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79U040 Hexagon Self-Locking Nut

5310-00-449-2921

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Official Item Classification

Name
Hexagon Self-Locking Nut
Part Number
79U040
(NSN) National Stock Number
5310-00-449-2921
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5310 Nuts and Washers
(INC) Item Name Code
05277
(FIIG) Federal Item Identification Guide
A021A0
Date
01/01/1963 (63 years ago)

0.500 inches nominal width across flats, 3b thread class, right-hand thread direction, 0.375 inches nominal nut height, prevailing torque with nonmetallic insert locking feature

Specs & Compatibility

Thread Class

3b

Thread Direction

right-hand

Locking Feature

prevailing torque with nonmetallic insert

Nut Height

0.375 inches nominal

Width Across Flats

0.500 inches nominal

Thread Series

unc

Thread Quantity Per Inch

20

Nominal Thread Size

0.250 inches

Material

fiber locking insert

Material

steel comp 303 nut

Material Document And Classification

66 fed std single material response nut

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Source of Supply Code

S9I

Pseudo Item Name Code

0005277

Related Hardware Products

Part Number Description
79U040 Hexagon Self-Locking Nut
SMB389300-3 Hexagon Self-Locking Nut

Frequently Asked Questions

What is the FSCG of the NSN 5310-00-449-2921?
The FSCG of the NSN 5310-00-449-2921 is 5310
Does the NSN 5310-00-449-2921 have a Schedule B code assigned?
Yes, the Schedule B code is 7318160000
Does NSN 5310-00-449-2921 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 5310-00-449-2921 contain precious materials?
Precious metal content is unknown
Does NSN 5310-00-449-2921 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 5310-00-449-2921 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963