H20-7

View detailed technical data, stock status, and sourcing information for: H20-7
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-965-6998

Item Name Code

29729

Assigment Date

06/06/1966 (60 years ago)

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

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

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: dry film lubricant
Overall Height: 0.531 inches maximum
Nut Style: double hexagon
Washer Thickness: 0.064 inches nominal
Width Across Flats: 0.553 inches minimum and 0.564 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 20
Hardness Rating: 38.0 rockwell c minimum and 45.0 rockwell c maximum
Nominal Thread Size: 0.438 inches
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: qq-p-416,ty 1,cl 2 fed spec 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Below is a list of NSNs that have been officially superseded by this NSN: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
5310-00-680-5443	No Name Available	12/29/1967

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
57585-720	Extended Washer Self-Locking Nut
H20-7	Extended Washer Self-Locking Nut
LHEB220-070	Extended Washer Self-Locking Nut
VN407A070	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-965-6998?

The FSCG of the NSN 5310-00-965-6998 is 5310

Does the NSN 5310-00-965-6998 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-965-6998 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 5310-00-965-6998 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-965-6998 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 5310-00-965-6998 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Mon, Jun 6, 1966