A51B21014-13

View detailed technical data, stock status, and sourcing information for: A51B21014-13
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-818-0628

Item Name Code

15933

Assigment Date

04/18/1972 (54 years ago)

0.252 inches minimum and 0.260 inches maximum hole diameter, 0.332 inches minimum and 0.340 inches maximum recess diameter, 0.063 inches nominal material thickness, 33.0 rockwell c minimum and 37.0 rockwell c maximum hardness rating, 90.0 degrees nominal recess angle

Product Characteristics

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

Hole Diameter: 0.252 inches minimum and 0.260 inches maximum
Recess Diameter: 0.332 inches minimum and 0.340 inches maximum
Material Thickness: 0.063 inches nominal
Hardness Rating: 33.0 rockwell c minimum and 37.0 rockwell c maximum
Recess Angle: 90.0 degrees nominal
Part Name Assigned By Controlling Agency: navy special project
Heat Treatment: as fabricated
Material Document And Classification: mil-s-18729 mil spec single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: mil-c-8837,ty 2,cl 1 mil spec single treatment response overall
Style Designator: recessed
Test Data Document: "81349-mil-i-6868 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."

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
A51B21014-13	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-00-818-0628?

The FSCG of the NSN 5310-00-818-0628 is 5310

Does NSN 5310-00-818-0628 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 5310-00-818-0628 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-818-0628 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 5310-00-818-0628 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Tue, Apr 18, 1972