158-26

View detailed technical data, stock status, and sourcing information for: 158-26
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-081-5441

Item Name Code

18257

Assigment Date

08/16/1979 (47 years ago)

right-hand thread direction, 0.470 inches minimum and 0.500 inches maximum fastener length, 0.399 inches minimum and 0.500 inches maximum thread length, 3a thread class, hexagon 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: 0.399 inches minimum and 0.500 inches maximum
Fastener Length: 0.470 inches minimum and 0.500 inches maximum
Head Style: hexagon
Head Height: 0.150 inches minimum and 0.163 inches maximum
Width Between Flats: 0.428 inches minimum and 0.438 inches maximum
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
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
10RT20	Hexagon Head Cap Screw
158-26	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-081-5441?

The FSCG of the NSN 5305-01-081-5441 is 5305

Does NSN 5305-01-081-5441 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 5305-01-081-5441 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-081-5441 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 5305-01-081-5441 was assigned to the Federal Catalog?

It was assigned 47 years ago, on Thu, Aug 16, 1979