MS21045L4

View detailed technical data, stock status, and sourcing information for: MS21045L4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-857-5557

Item Name Code

05277

Assigment Date

01/01/1963 (63 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.

dry film lubricant lubrication, prevailing torque all metal design locking feature, hexagon nut style, right-hand thread direction, 3b thread class

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 all metal design
Lubrication: dry film lubricant
Nut Style: hexagon
Nut Height: 0.240 inches minimum and 0.328 inches maximum
End Item Identification: high-mobility artillery rocket system (himars)
Width Across Flats: 0.430 inches minimum and 0.439 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 28
Nominal Thread Size: 0.250 inches
Countersink Angle: 88.0 degrees nominal nut
Bearing Surface Type: chamfered
Bearing Surface Finish: 125.0 microinches
Material: steel overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416 fed spec single treatment response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-01-418-5799	No Name Available	02/01/2000

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
28FH-428	Hexagon Self-Locking Nut
H55-4	Hexagon Self-Locking Nut
MS21045L4	Hexagon Self-Locking Nut
NAS1022AM4	Hexagon Self-Locking Nut
RM1801-048	Hexagon Self-Locking Nut
SL2374-4	Hexagon Self-Locking Nut
SPS28GH428	Hexagon Self-Locking Nut
YE3200	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-857-5557?

The FSCG of the NSN 5310-00-857-5557 is 5310

Does the NSN 5310-00-857-5557 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-857-5557 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 5310-00-857-5557 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-857-5557 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 5310-00-857-5557 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963