491-HG

View detailed technical data, stock status, and sourcing information for: 491-HG
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-114-5043

Item Name Code

18257

Assigment Date

06/18/1981 (45 years ago)

0.500 inches nominal fastener length, hexagon head style, right-hand thread direction, 0.400 inches minimum and 0.500 inches maximum thread length, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.400 inches minimum and 0.500 inches maximum
Fastener Length: 0.500 inches nominal
Head Style: hexagon
Head Height: 0.172 inches minimum and 0.190 inches maximum
Width Between Flats: 0.367 inches minimum and 0.375 inches maximum
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Material: copper overall
Surface Treatment: chromium 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
491-HG	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-114-5043?

The FSCG of the NSN 5305-01-114-5043 is 5305

Does the NSN 5305-01-114-5043 have a Schedule B code assigned?

Yes, the Schedule B code is 7415338550

Does NSN 5305-01-114-5043 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 5305-01-114-5043 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-114-5043 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 5305-01-114-5043 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Thu, Jun 18, 1981