53187-A

View detailed technical data, stock status, and sourcing information for: 53187-A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-061-9683

Item Name Code

18257

Assigment Date

07/07/1978 (48 years ago)

An insulator having flat surfaces, with or without holes, whose thickness does not exceed 25 percent of its length or width, whichever is smaller, and whose shape is other than round. Excludes:insulator (1), spacer; insulator (1), washer; mounting pad, electrical-electronic component; plate, electrical shield; and terminal board.

2a thread class, 0.970 inches minimum and 1.000 inches maximum fastener length, 0.750 inches nominal thread length, right-hand thread direction, hexagon head style

Product Characteristics

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

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.750 inches nominal
Fastener Length: 0.970 inches minimum and 1.000 inches maximum
Head Style: hexagon
Head Height: 0.150 inches minimum and 0.163 inches maximum
Width Between Flats: 0.428 inches minimum and 0.438 inches maximum
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 12000 pounds per square inch
Hardness Rating: 24.0 rockwell c minimum and 34.0 rockwell c maximum overall
Minimum Yield Strength: 92000 pounds per square inch
Material: steel overall
Surface Treatment: cadmium or zinc overall
Thread Series Designator: unf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-01-062-4786	No Name Available	05/01/1998

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
53187-A	Hexagon Head Cap Screw
G491545-8	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-061-9683?

The FSCG of the NSN 5305-01-061-9683 is 5305

Does the NSN 5305-01-061-9683 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-061-9683 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 5305-01-061-9683 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-061-9683 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 5305-01-061-9683 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Fri, Jul 7, 1978