2101D9

View detailed technical data, stock status, and sourcing information for: 2101D9
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-271-6623

Item Name Code

01854

Assigment Date

01/01/1963 (63 years ago)

A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes:nut (1), plain, slotted, hexagon.

0.708 inches minimum and 0.728 inches maximum nut height, castellated, hexagon nut style, 0.928 inches minimum and 0.940 inches maximum width across flats, 3b thread class, 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: 3b
Thread Direction: right-hand
Nut Style: castellated, hexagon
Nut Height: 0.708 inches minimum and 0.728 inches maximum
Width Across Flats: 0.928 inches minimum and 0.940 inches maximum
Thread Series: unf
Features Provided: casehardened
Thread Quantity Per Inch: 18
Hardness Rating: 19.0 rockwell c minimum and 26.0 rockwell c maximum
Nominal Thread Size: 0.625 inches
Countersink Angle: 85.0 degrees minimum and 95.0 degrees maximum nut
Bearing Surface Type: chamfered or washer faced
Bearing Surface Finish: 63.0 microinches
Material: steel comp 8740 overall
Material Document And Classification: ams 6322 assn std single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: ams 2400 assn std 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Below is a list of NSNs that have been officially superseded by this NSN: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
5310-00-208-7201	No Name Available	01/01/1961

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
2101D9	Nut,plain,castellated,hexagon
AN121558	Nut,plain,castellated,hexagon

FAQs

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

What is the FSCG of the NSN 5310-00-271-6623?

The FSCG of the NSN 5310-00-271-6623 is 5310

Does the NSN 5310-00-271-6623 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-271-6623 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 5310-00-271-6623 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-271-6623 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 5310-00-271-6623 was assigned to the Federal Catalog?

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