MS51957-803

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-059-1914

Item Name Code

06657

Assigment Date

04/08/1978 (48 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

0.494 inches minimum and 0.625 inches maximum thread length, 0.594 inches minimum and 0.625 inches maximum fastener length, right-hand thread direction, pan head style, 2a thread class

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: 0.494 inches minimum and 0.625 inches maximum
Fastener Length: 0.594 inches minimum and 0.625 inches maximum
Head Style: pan
Head Diameter: 0.473 inches minimum and 0.492 inches maximum
Head Height: 0.162 inches minimum and 0.175 inches maximum
Internal Drive Style: cross recess type 1
End Item Identification: mrap buffalo mk2a2
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 80000 pounds per square inch
Screw Material: steel
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 3 type and 9c style

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
MS51957-803	Machine Screw
MS51957-805	Machine Screw
MS51957-80B	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-059-1914?

The FSCG of the NSN 5305-01-059-1914 is 5305

Does the NSN 5305-01-059-1914 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-059-1914 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 5305-01-059-1914 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-059-1914 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 5305-01-059-1914 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Sat, Apr 8, 1978