L55LHEB220-070

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-454-1251

Item Name Code

29729

Assigment Date

04/18/1969 (57 years ago)

A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

3b thread class, 0.770 inches maximum washer outside diameter, prevailing torque all metal design locking feature, right-hand thread direction, soluble lubricant lubrication

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
Washer Outside Diameter: 0.770 inches maximum
Lubrication: soluble lubricant
Overall Height: 0.531 inches maximum
Nut Style: double hexagon
Washer Thickness: 0.054 inches minimum and 0.074 inches maximum
Width Across Flats: 0.550 inches minimum and 0.565 inches maximum
Temp Rating: -65.0 fahrenheit minimum and 450.0 fahrenheit maximum
Thread Series: unjf
Thread Quantity Per Inch: 20
Hardness Rating: 30.0 rockwell c minimum and 46.0 rockwell c maximum
Nominal Thread Size: 0.438 inches
Material: steel comp 3140 or steel comp 8740 overall
Material Document And Classification: aisi assn std single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 2 fed 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
68457-720	Extended Washer Self-Locking Nut
H29649-7	Extended Washer Self-Locking Nut
L55LHEB220-070	Extended Washer Self-Locking Nut
STSCD007-14	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-454-1251?

The FSCG of the NSN 5310-00-454-1251 is 5310

Does the NSN 5310-00-454-1251 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-454-1251 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 5310-00-454-1251 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-454-1251 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 5310-00-454-1251 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Apr 18, 1969