218-20

View detailed technical data, stock status, and sourcing information for: 218-20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-167-1355

Item Name Code

01857

Assigment Date

01/01/1963 (63 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.)

0.150 inches minimum and 0.156 inches maximum width across flats, 2b thread class, 0.043 inches minimum and 0.050 inches maximum nut height, right-hand thread direction, hexagon nut style

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: 0.043 inches minimum and 0.050 inches maximum
Width Across Flats: 0.150 inches minimum and 0.156 inches maximum
Thread Series: unf
Thread Quantity Per Inch: 72
Nominal Thread Size: 0.073 inches
Countersink Angle: 110.0 degrees nominal nut
Bearing Surface Type: chamfered or washer faced
Material: copper alloy overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-001-4845	No Name Available	10/01/1982
5310-00-282-9123	No Name Available	01/01/1960

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
218-20	Hexagon Plain Nut
AN345B1	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-00-167-1355?

The FSCG of the NSN 5310-00-167-1355 is 5310

Does the NSN 5310-00-167-1355 have a Schedule B code assigned?

Yes, the Schedule B code is 7415290000

Does NSN 5310-00-167-1355 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 5310-00-167-1355 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-167-1355 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 5310-00-167-1355 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963