ST3M557-4-8

View detailed technical data, stock status, and sourcing information for: ST3M557-4-8
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-512-7265

Item Name Code

29294

Assigment Date

09/09/2003 (22 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, 0.469 inches nominal thread length, 0.969 inches nominal fastener length, flat countersunk head style, 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: 3a
Thread Direction: right-hand
Thread Length: 0.469 inches nominal
Fastener Length: 0.969 inches nominal
Head Style: flat countersunk
Head Diameter: 0.3898 inches minimum and 0.3948 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Internal Drive Style: high-torque
End Item Identification: fuselage aft
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.490 inches minimum and 0.510 inches maximum
Thread Quantity Per Inch: 28
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Material: nickel alloy 718 overall
Material Document And Classification: ams 5662 assn std single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response overall
Thread Series Designator: unjf

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
11923-4-8	Close Tolerance Screw
HT4027-4-8	Close Tolerance Screw
ST3M557-4-8	Close Tolerance Screw
WC4027-4-8	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-512-7265?

The FSCG of the NSN 5305-01-512-7265 is 5305

Does the NSN 5305-01-512-7265 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-512-7265 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 5305-01-512-7265 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-512-7265 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 5305-01-512-7265 was assigned to the Federal Catalog?

It was assigned 22 years ago, on Tue, Sep 9, 2003