ST3M557-4-6

View detailed technical data, stock status, and sourcing information for: ST3M557-4-6
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-253-4860

Item Name Code

29294

Assigment Date

04/18/1987 (39 years ago)

A terminal, generally postlike, having an axial portion of its body designed for projecting through or into a panel, or the like, for mounting. Requires the use of tool(s) for attachment of wire. The conductor connection may be insulated from the mounting. Excludes:terminal, feedthru. See also terminal, quick disconnect and terminal set, quick disconnect.

3a thread class, flat countersunk head style, 0.828 inches minimum and 0.875 inches maximum fastener length, 0.469 inches nominal 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: 3a
Thread Direction: right-hand
Thread Length: 0.469 inches nominal
Fastener Length: 0.828 inches minimum and 0.875 inches maximum
Head Style: flat countersunk
Head Diameter: 0.456 inches minimum and 0.508 inches maximum
Grip Diameter: 0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.365 inches minimum and 0.385 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 7500 pounds per square inch
Countersink Angle: 100.0 degrees nominal
Material: steel comp xm-13 overall
Material Document And Classification: ams5629 assn std single material response overall
Surface Treatment: aluminum 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
HT4027-4-6	Close Tolerance Screw
ST3M557-4-6	Close Tolerance Screw
WC4027-4-6	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-253-4860?

The FSCG of the NSN 5305-01-253-4860 is 5305

Does the NSN 5305-01-253-4860 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-253-4860 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 5305-01-253-4860 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-253-4860 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 5305-01-253-4860 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Sat, Apr 18, 1987