FFB571TYPEB2CLASSC Square Plain Nut

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5310-00-208-3041

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Official Item Classification

Name: Square Plain Nut
Part Number: FFB571TYPEB2CLASSC
(NSN) National Stock Number: 5310-00-208-3041
(FSG) Federal Supply Group: 53 Hardware and Abrasives
(FSC) Federal Supply Classification: 5310 Nuts and Washers
(INC) Item Name Code: 01858
(FIIG) Federal Item Identification Guide: A021A0
Date: 01/01/1963 (63 years ago)

2b thread class, square nut style, 0.425 inches minimum and 0.4375 inches maximum width across flats, 0.203 inches minimum and 0.235 inches maximum nut height, right-hand thread direction

Specs & Compatibility

Thread Class

Thread Direction

right-hand

Nut Style

square

Nut Height

0.203 inches minimum and 0.235 inches maximum

Width Across Flats

0.425 inches minimum and 0.4375 inches maximum

Thread Series

unc

Thread Quantity Per Inch

Nominal Thread Size

0.250 inches

Bearing Surface Type

washer faced

Material

steel overall

Nondefinitive Spec/Std Data

b-2 type and c class

Regulatory Compliance

Precious Metals Indicator

Precious metal content is unknown

Criticality Code

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Source of Supply Code

S9I

Pseudo Item Name Code

0001858

Related Hardware Products

Part Number	Description
FFB571TYPEB2CLASSC	Square Plain Nut

Frequently Asked Questions

What is the FSCG of the NSN 5310-00-208-3041?

The FSCG of the NSN 5310-00-208-3041 is 5310

Does the NSN 5310-00-208-3041 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-208-3041 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 5310-00-208-3041 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-208-3041 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 5310-00-208-3041 was assigned to the Federal Catalog?

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