66787-720

View detailed technical data, stock status, and sourcing information for: 66787-720
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-107-2231

Item Name Code

29729

Assigment Date

08/02/1968 (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.

right-hand thread direction, 0.454 inches minimum and 0.469 inches maximum overall height, 3b thread class, prevailing torque all metal design locking feature, 0.692 inches minimum washer outside diameter

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: 0.692 inches minimum
Overall Height: 0.454 inches minimum and 0.469 inches maximum
Nut Style: double hexagon
Washer Thickness: 0.082 inches minimum and 0.092 inches maximum
Width Across Flats: 0.553 inches minimum and 0.564 inches maximum
Thread Series: unjf
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.438 inches
Material: nickel alloy overall
Material Document And Classification: ams 5709 assn std single material response overall
Precious Material: silver
Surface Treatment: silver 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
5310PL0626682	Extended Washer Self-Locking Nut
66787-720	Extended Washer Self-Locking Nut
9610M50P05	Extended Washer Self-Locking Nut
H29412-7	Extended Washer Self-Locking Nut
LH8155-070	Extended Washer Self-Locking Nut
VN439W070	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-107-2231?

The FSCG of the NSN 5310-00-107-2231 is 5310

Does the NSN 5310-00-107-2231 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5310-00-107-2231 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 5310-00-107-2231 contain precious materials?

Item contains silver.

Does NSN 5310-00-107-2231 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 5310-00-107-2231 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Aug 2, 1968