FF-S-86 TYPE VIII

View detailed technical data, stock status, and sourcing information for: FF-S-86 TYPE VIII
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-840-4257

Item Name Code

16282

Assigment Date

03/20/1968 (58 years ago)

3a thread class, 0.625 inches minimum thread length, 0.625 inches nominal fastener length, right-hand thread direction, button 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: 0.625 inches minimum
Fastener Length: 0.625 inches nominal
Head Style: button
Head Diameter: 0.427 inches nominal
Head Height: 0.105 inches nominal
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.125 inches nominal
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 145000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 42.0 rockwell c maximum overall
Material: steel overall
Surface Treatment: cadmium and chromate or zinc and chromate overall
Thread Series Designator: unf

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
FF-S-86 TYPE VIII	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-840-4257?

The FSCG of the NSN 5305-00-840-4257 is 5305

Does the NSN 5305-00-840-4257 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-840-4257 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 5305-00-840-4257 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-840-4257 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 5305-00-840-4257 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Wed, Mar 20, 1968