5305-01-440-4891

Find complete technical information, availability, and procurement data for: 5305-01-440-4891
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-440-4891

Item Name Code

16282

Assigment Date

01/15/1997 (29 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

3a thread class, right-hand thread direction, flat chamfer head style, 0.525 inches minimum and 0.625 inches maximum thread length, 0.625 inches nominal fastener 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: 3a
Thread Direction: right-hand
Thread Length: 0.525 inches minimum and 0.625 inches maximum
Fastener Length: 0.625 inches nominal
Head Style: flat chamfer
Head Diameter: 0.365 inches minimum and 0.375 inches maximum
Head Height: 0.244 inches minimum and 0.250 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.188 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 180000 pounds per square inch
Hardness Rating: 39.0 rockwell c minimum and 45.0 rockwell c maximum overall
Minimum Yield Strength: 155000 pounds per square inch
Material: nickel alloy k-500 overall
Material Document And Classification: qq-n-281 fed spec single material response 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
1/4-20UNC3A QQN -281D CL A OR B	Socket Head Cap Screw
N-999-6064-B-001 ITEM NO. 44	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-440-4891?

The FSCG of the NSN 5305-01-440-4891 is 5305

Does the NSN 5305-01-440-4891 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-440-4891 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 5305-01-440-4891 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-440-4891 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 5305-01-440-4891 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Wed, Jan 15, 1997