5305-01-331-6284

Find complete technical information, availability, and procurement data for: 5305-01-331-6284
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-331-6284

Item Name Code

18257

Assigment Date

12/21/1990 (35 years ago)

1.795 inches minimum and 2.000 inches maximum thread length, right-hand thread direction, hexagon head style, 1.906 inches minimum and 2.000 inches maximum fastener length, 2a thread class

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: 1.795 inches minimum and 2.000 inches maximum
Fastener Length: 1.906 inches minimum and 2.000 inches maximum
Head Style: hexagon
Head Height: 0.378 inches minimum and 0.403 inches maximum
Width Between Flats: 0.922 inches minimum and 0.938 inches maximum
Shank Unthreaded Hole Diameter: 0.138 inches minimum and 0.146 inches maximum first hole
Nominal Thread Diameter: 0.625 inches
Thread Quantity Per Inch: 18
Minimum Tensile Strength: 120000 pounds per square inch
Hardness Rating: 32.0 rockwell c minimum and 38.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.912 inches nominal first hole
Material: steel overall
Material Document And Classification: sae gr8 assn std single material response overall
Surface Treatment: phosphate zinc overall
Surface Treatment Document And Classification: dod-p-16232 tyz mil spec single treatment response overall
Thread Series Designator: unf
Nondefinitive Spec/Std Data: 2 type and 10p style and 8 grade

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
MS51108-139	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-331-6284?

The FSCG of the NSN 5305-01-331-6284 is 5305

Does the NSN 5305-01-331-6284 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-331-6284 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 5305-01-331-6284 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-331-6284 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 5305-01-331-6284 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Fri, Dec 21, 1990