1851093PC1

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-730-4804

Item Name Code

01852

Assigment Date

01/01/1961 (65 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.

2.500 inches nominal fastener length, 2a thread class, knurled no. 1 head style, 0.375 inches minimum thread length, right-hand thread direction

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: 0.375 inches minimum
Fastener Length: 2.500 inches nominal
Head Style: knurled no. 1
Head Diameter: 0.875 inches nominal
Head Height: 0.312 inches nominal
First Diameter From Head: 0.225 inches minimum and 0.235 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.312 inches
Thread Quantity Per Inch: 18
Externally Relieved Body Diameter Quantity: 1
Material: steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 310 or steel comp 316 overall
Material Document And Classification: qq-s-763 fed spec all material responses or qq-w-423 fed spec all material responses overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: mil-f-14072,finish e300 mil spec single treatment 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
1851093PC1	Externally Relieved Body Screw
1851093PC1REVA	Externally Relieved Body Screw
3111-1035P1	Externally Relieved Body Screw

FAQs

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

What is the FSCG of the NSN 5305-00-730-4804?

The FSCG of the NSN 5305-00-730-4804 is 5305

Does the NSN 5305-00-730-4804 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-730-4804 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 5305-00-730-4804 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-730-4804 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 5305-00-730-4804 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961