MS21280-31

View detailed technical data, stock status, and sourcing information for: MS21280-31
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-944-2634

Item Name Code

01847

Assigment Date

03/01/1966 (60 years ago)

An electrical fitting with electrical contacts constructed to be affixed to the end of a cable, conduit, coaxial line, cord, wire (includes printed/etched), printed wiring board, or the like for convenience in joining with another electrical connector or printed wiring board. It is designed to be mounted on a bulkhead, chassis, panel, wall, printed wiring board, or the like. Excludes:lampholder; jack,telephone; jack,tip; insert electrical connector; insert module,electrical connector; connector body (as modified) and socket,plug-in electronic components. See also wiring harness (as modified) and cable assembly (as modified). For items with termination wires of more than four inches in length, see lead assembly,electrical. For items without inserts, see shell,electrical connector.

3a thread class, double hexagon extended washer head style, 0.750 inches minimum thread length, right-hand thread direction, 2.375 inches nominal fastener 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: 3a
Thread Direction: right-hand
Thread Length: 0.750 inches minimum
Fastener Length: 2.375 inches nominal
Head Style: double hexagon extended washer
Head Height: 0.320 inches minimum and 0.340 inches maximum
Width Between Flats: 0.304 inches minimum and 0.313 inches maximum
Extended Washer Diameter: 0.428 inches minimum and 0.448 inches maximum
Extended Washer Thickness: 0.060 inches minimum and 0.070 inches maximum
End Item Identification: spec item
Nominal Thread Diameter: 0.250 inches
Grip Length: 1.625 inches nominal
Features Provided: finished head
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 130000 pounds per square inch
Material: iron alloy 660 overall
Material Document And Classification: ams 5732 assn std single material response overall
Surface Treatment: passivate overall
Thread Series Designator: unjf

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
MS21280-31	Machine Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-944-2634?

The FSCG of the NSN 5306-00-944-2634 is 5306

Does the NSN 5306-00-944-2634 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-944-2634 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 5306-00-944-2634 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-00-944-2634 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 5306-00-944-2634 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Tue, Mar 1, 1966