181738

View detailed technical data, stock status, and sourcing information for: 181738
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-727-2501

Item Name Code

05277

Assigment Date

01/01/1963 (63 years ago)

3b thread class, hexagon nut style, right-hand thread direction, prevailing torque all metal design locking feature, 0.125 inches maximum nut height

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
Nut Style: hexagon
Nut Height: 0.125 inches maximum
Width Across Flats: 0.240 inches minimum and 0.252 inches maximum
Temp Rating: 800.0 fahrenheit nominal
Thread Series: unjc
Thread Quantity Per Inch: 40
Nominal Thread Size: 0.112 inches
Countersink Angle: 120.0 degrees nominal nut
Bearing Surface Type: chamfered or washer faced
Special Features: with internal drive style
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response overall
Precious Material: silver
Surface Treatment: silver overall
Surface Treatment Document And Classification: ams 2410 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Below is a list of NSNs that have been officially superseded by this NSN: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
5310-00-685-1561	No Name Available	02/01/1993
5310-00-814-9068	No Name Available	07/01/1997

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
181738	Hexagon Self-Locking Nut
33-38C40	Hexagon Self-Locking Nut
370218	Hexagon Self-Locking Nut
503/4/04034/008	Hexagon Self-Locking Nut
918B105-8	Hexagon Self-Locking Nut
H31-04	Hexagon Self-Locking Nut
LHTM2860-40W	Hexagon Self-Locking Nut
NAS679C04W	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-727-2501?

The FSCG of the NSN 5310-00-727-2501 is 5310

Does the NSN 5310-00-727-2501 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-727-2501 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 5310-00-727-2501 contain precious materials?

Item contains silver.

Does NSN 5310-00-727-2501 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 5310-00-727-2501 was assigned to the Federal Catalog?

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