5305-00-639-2686

Find complete technical information, availability, and procurement data for: 5305-00-639-2686
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-639-2686

Item Name Code

18257

Assigment Date

01/01/1963 (63 years ago)

hexagon head style, 1.115 inches minimum and 1.135 inches maximum fastener length, 3a thread class, right-hand thread direction, 1.085 inches minimum and 1.135 inches maximum thread length

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: 1.085 inches minimum and 1.135 inches maximum
Fastener Length: 1.115 inches minimum and 1.135 inches maximum
Head Style: hexagon
Head Height: 0.318 inches minimum and 0.338 inches maximum
Width Between Flats: 0.616 inches minimum and 0.627 inches maximum
Hole Diameter: 0.070 inches nominal
Nominal Thread Diameter: 0.438 inches
Hole Quantity: 6
Hole Type: drilled
Thread Quantity Per Inch: 20
Hardness Rating: 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
Hole Configuration Style: hexagon longitudinal hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel comp 8740 overall
Material Document And Classification: ams 6322 assn std single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: ams 2400 assn std single treatment response 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Below is a list of NSNs that have been officially superseded by this NSN: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
5305-00-525-6160	No Name Available	12/01/1997

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
AN104112	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-639-2686?

The FSCG of the NSN 5305-00-639-2686 is 5305

Does the NSN 5305-00-639-2686 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-639-2686 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 5305-00-639-2686 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-639-2686 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 5305-00-639-2686 was assigned to the Federal Catalog?

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