688-1864,1/2-13UNC-2B

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-201-8876

Item Name Code

01857

Assigment Date

02/23/1985 (41 years ago)

An internally threaded nut which has either an internal seat or shoulder and/or is designed to be used with a ferrule, to mate with the seat of an externally threaded tube fitting to form a leakproof connection. Excludes:nut (1), tube coupling, reducing; and nut (1), union.

0.427 inches minimum and 0.448 inches maximum nut height, 2b thread class, hexagon nut style, 0.736 inches minimum and 0.750 inches maximum width across flats, 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 Class: 2b
Thread Direction: right-hand
Nut Style: hexagon
Nut Height: 0.427 inches minimum and 0.448 inches maximum
Width Across Flats: 0.736 inches minimum and 0.750 inches maximum
Thread Series: unc
Thread Quantity Per Inch: 13
Hardness Rating: 23.0 rockwell c minimum and 32.0 rockwell c maximum
Nominal Thread Size: 0.500 inches
Criticality Code Justification: zzzy
Bearing Surface Type: washer faced
Special Features: nuclear level 1
Material: steel overall
Material Document And Classification: 688-1964,gr-5,fsc-43689 mfr ref single material response overall
Reference Number Differentiating Characteristics: material will be in accordance with ships parts control center activity hx quality control,manufacturing and testing specifications

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
0.50013UNC2BG5T3SAN	Hexagon Plain Nut
688-1864,1/2-13UNC-2B	Hexagon Plain Nut
MIL-B-857,TY3,GR5,STY A	Hexagon Plain Nut

FAQs

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

What is the FSCG of the NSN 5310-01-201-8876?

The FSCG of the NSN 5310-01-201-8876 is 5310

Does the NSN 5310-01-201-8876 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-201-8876 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 5310-01-201-8876 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-201-8876 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 5310-01-201-8876 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Sat, Feb 23, 1985