553-8257-002

View detailed technical data, stock status, and sourcing information for: 553-8257-002
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-057-0557

Item Name Code

15887

Assigment Date

01/01/1961 (65 years ago)

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

2b thread class, 0.095 inches minimum and 0.105 inches maximum nut thickness, right-hand thread direction, round nut style, 0.562 inches nominal nut 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: 2b
Thread Direction: right-hand
Nut Style: round
Nut Diameter: 0.562 inches nominal
Nut Thickness: 0.095 inches minimum and 0.105 inches maximum
Drive Point Quantity: 2
Drive Point Diameter: 0.078 inches nominal
Thread Series: unc
Thread Quantity Per Inch: 18
Nominal Thread Size: 0.312 inches
Part Name Assigned By Controlling Agency: navy special project
Material: steel comp 303 overall
Material Document And Classification: qq-s-763 fed spec single material response overall
Surface Treatment: passivate 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
553-8257-002	Round Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-00-057-0557?

The FSCG of the NSN 5310-00-057-0557 is 5310

Does the NSN 5310-00-057-0557 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-057-0557 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 5310-00-057-0557 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-057-0557 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 5310-00-057-0557 was assigned to the Federal Catalog?

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