MS51988-5

View detailed technical data, stock status, and sourcing information for: MS51988-5
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-176-6611

Item Name Code

29730

Assigment Date

02/16/1970 (56 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.

3b thread class, prevailing torque all metal design locking feature, right-hand thread direction, 0.338 inches maximum overall height, 0.660 inches minimum and 0.680 inches maximum 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: 0.660 inches minimum and 0.680 inches maximum
Overall Height: 0.338 inches maximum
Nut Style: hexagon
Washer Thickness: 0.040 inches minimum and 0.060 inches maximum
Width Across Flats: 0.489 inches minimum and 0.502 inches maximum
Thread Series: unc
Thread Quantity Per Inch: 18
Nominal Thread Size: 0.312 inches
Material: steel overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 3 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
MS51988-5	Extended Washer Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-176-6611?

The FSCG of the NSN 5310-00-176-6611 is 5310

Does the NSN 5310-00-176-6611 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-176-6611 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 5310-00-176-6611 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-176-6611 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 5310-00-176-6611 was assigned to the Federal Catalog?

It was assigned 56 years ago, on Mon, Feb 16, 1970