91257A851

View detailed technical data, stock status, and sourcing information for: 91257A851
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-610-5585

Item Name Code

18257

Assigment Date

08/22/2012 (14 years ago)

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

2a thread class, right-hand thread direction, hexagon head style, 4.000 inches nominal fastener length, 1.750 inches minimum and 2.250 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: 2a
Thread Direction: right-hand
Thread Length: 1.750 inches minimum and 2.250 inches maximum
Fastener Length: 4.000 inches nominal
Head Style: hexagon
Head Height: 0.468 inches nominal
Width Between Flats: 1.125 inches nominal
Extended Washer Diameter: 0.468 inches nominal
End Item Identification: 2320015323599
Nominal Thread Diameter: 0.750 inches
Thread Quantity Per Inch: 10
Part Name Assigned By Controlling Agency: hex head cap screw
Material: steel 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
91257A851	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-610-5585?

The FSCG of the NSN 5305-01-610-5585 is 5305

Does the NSN 5305-01-610-5585 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-610-5585 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 5305-01-610-5585 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-610-5585 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 5305-01-610-5585 was assigned to the Federal Catalog?

It was assigned 14 years ago, on Wed, Aug 22, 2012