1C688J

View detailed technical data, stock status, and sourcing information for: 1C688J
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-023-6251

Item Name Code

18257

Assigment Date

06/23/1976 (50 years ago)

3a thread class, 1.000 inches nominal thread length, right-hand thread direction, 5.400 inches minimum and 5.500 inches maximum fastener length, 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: 3a
Thread Direction: right-hand
Thread Length: 1.000 inches nominal
Fastener Length: 5.400 inches minimum and 5.500 inches maximum
Head Style: hexagon
Head Height: 0.226 inches minimum and 0.243 inches maximum
Width Between Flats: 0.551 inches minimum and 0.562 inches maximum
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 16
Minimum Tensile Strength: 120000 pounds per square inch
Hardness Rating: 25.0 rockwell c minimum and 34.0 rockwell c maximum overall
Minimum Yield Strength: 92000 pounds per square inch
Material: steel overall
Material Document And Classification: sae gr 5 assn std single material response overall
Surface Treatment: zinc overall
Thread Series Designator: unc

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
1C688J	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-023-6251?

The FSCG of the NSN 5305-01-023-6251 is 5305

Does the NSN 5305-01-023-6251 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-023-6251 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 5305-01-023-6251 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-023-6251 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 5305-01-023-6251 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Wed, Jun 23, 1976