MS51960-121

View detailed technical data, stock status, and sourcing information for: MS51960-121
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-420-0754

Item Name Code

06657

Assigment Date

12/16/1970 (55 years ago)

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

flat countersunk head style, 2a thread class, right-hand thread direction, 2.656 inches minimum and 2.750 inches maximum fastener length, 1.750 inches minimum thread length

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 minimum
Fastener Length: 2.656 inches minimum and 2.750 inches maximum
Head Style: flat countersunk
Head Diameter: 0.685 inches minimum and 0.762 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 80000 pounds per square inch
Countersink Angle: 80.0 degrees minimum and 82.0 degrees maximum
Screw Material: steel corrosion resisting or steel
Screw Material Document And Classification: qq-s-763,300 series fed spec 1st material response or 66,300 series fed std 1st material response or comp 16-18 or 18-8 assn std 2nd material response
Screw Surface Treatment: passivate
Screw Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response
Thread Series Designator: unf

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
MS51960-121	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-420-0754?

The FSCG of the NSN 5305-00-420-0754 is 5305

Does the NSN 5305-00-420-0754 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-420-0754 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 5305-00-420-0754 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-420-0754 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 5305-00-420-0754 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Dec 16, 1970