556853

View detailed technical data, stock status, and sourcing information for: 556853
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-220-6740

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.)

1.240 inches minimum and 1.260 inches maximum width across flats, +0.8425 to 0.8472 inches thread pitch diameters, hexagon nut style, 0.302 inches minimum and 0.312 inches maximum nut height, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Pitch Diameters: +0.8425 to 0.8472 inches
Thread Direction: right-hand
Nut Style: hexagon
Nut Height: 0.302 inches minimum and 0.312 inches maximum
Width Across Flats: 1.240 inches minimum and 1.260 inches maximum
Thread Series: unef
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.875 inches
Bearing Surface Type: washer faced
Material: steel comp 1117 overall
Material Document And Classification: sae assn std single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-275-0904	No Name Available	08/25/1971
5310-00-384-8806	No Name Available	09/01/1978

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
399K233	Hexagon Plain Nut
5039P11	Hexagon Plain Nut
5310002206740	Hexagon Plain Nut
556853	Hexagon Plain Nut
6245669	Hexagon Plain Nut
648304	Hexagon Plain Nut
853386	Hexagon Plain Nut
B245669	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-00-220-6740?

The FSCG of the NSN 5310-00-220-6740 is 5310

Does the NSN 5310-00-220-6740 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-220-6740 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 5310-00-220-6740 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-220-6740 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 5310-00-220-6740 was assigned to the Federal Catalog?

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