2177525-C311-12

View detailed technical data, stock status, and sourcing information for: 2177525-C311-12
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-376-5109

Item Name Code

01857

Assigment Date

06/04/1993 (33 years ago)

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

2b thread class, hexagon nut style, 0.403 inches minimum and 0.441 inches maximum nut height, right-hand thread direction, 0.728 inches minimum and 0.750 inches maximum width across flats

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
Thread Direction: right-hand
Nut Style: hexagon
Nut Height: 0.403 inches minimum and 0.441 inches maximum
Width Across Flats: 0.728 inches minimum and 0.750 inches maximum
Thread Series: unc
Thread Quantity Per Inch: 14
Hardness Rating: 24.0 rockwell c minimum and 38.0 rockwell c maximum
Nominal Thread Size: 0.437 inches
Bearing Surface Type: chamfered or washer faced
Part Name Assigned By Controlling Agency: heavy hex nut
Material: steel uns k04002 overall
Material Document And Classification: astm a194 g4 2h,4 assn std single material response overall
Surface Treatment: phosphate zinc overall
Surface Treatment Document And Classification: dod-p-16232 ty z mil spec single treatment response overall

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
2177525-C311-12	Hexagon Plain Nut
803-2177525-C311-12	Hexagon Plain Nut
803-2177525-C321-12	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-376-5109?

The FSCG of the NSN 5310-01-376-5109 is 5310

Does the NSN 5310-01-376-5109 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-376-5109 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 5310-01-376-5109 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-376-5109 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 5310-01-376-5109 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Fri, Jun 4, 1993