5310-00-220-6766

Find complete technical information, availability, and procurement data for: 5310-00-220-6766
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-220-6766

Item Name Code

01857

Assigment Date

01/01/1961 (65 years ago)

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

right-hand thread direction, 2b thread class, hexagon nut style, 0.688 inches nominal width across flats, 0.438 inches nominal 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: 2b
Thread Direction: right-hand
Nut Style: hexagon
Nut Height: 0.438 inches nominal
Width Across Flats: 0.688 inches nominal
Thread Series: unf
Features Provided: casehardened
Thread Quantity Per Inch: 20
Hardness Rating: 30.0 rockwell c minimum and 37.0 rockwell c maximum
Nominal Thread Size: 0.438 inches
Bearing Surface Type: washer faced
Special Features: grooved 0.031 inches by 0.031 inches deep midway on head around corners of hex
Material: steel comp 1137 overall
Material Document And Classification: mil-s-866 mil spec single material 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
351025S8	Hexagon Plain Nut
638539	Hexagon Plain Nut
73123	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-00-220-6766?

The FSCG of the NSN 5310-00-220-6766 is 5310

Does the NSN 5310-00-220-6766 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-220-6766 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 5310-00-220-6766 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-220-6766 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 5310-00-220-6766 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961