MS51957-52B

View detailed technical data, stock status, and sourcing information for: MS51957-52B
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-521-8433

Item Name Code

06657

Assigment Date

07/07/2004 (22 years ago)

A metallic or nonmetallic item of various peripheral shapes, having a solid angular cross-section. It is designed to maintain a predetermined distance between two surfaces. It must have only one tapered surface. For items with two tapered surfaces, see wedge (as modified).

1.750 inches nominal fastener length, pan head style, 1.750 inches maximum thread length, 2a thread class, 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: 1.750 inches maximum
Fastener Length: 1.750 inches nominal
Head Style: pan
Head Diameter: 0.306 inches minimum and 0.322 inches maximum
Head Height: 0.105 inches minimum and 0.115 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.164 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 80000 pounds per square inch
Screw Material: steel comp 302 or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 384
Screw Material Document And Classification: qq-s-763 fed spec all material responses
Screw Surface Treatment: oxide
Screw Surface Treatment Document And Classification: mil-c-13924, cl4 mil spec single treatment response
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
MS51957-52B	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-521-8433?

The FSCG of the NSN 5305-01-521-8433 is 5305

Does the NSN 5305-01-521-8433 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-521-8433 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 5305-01-521-8433 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-521-8433 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 5305-01-521-8433 was assigned to the Federal Catalog?

It was assigned 22 years ago, on Wed, Jul 7, 2004