MS21125B416

View detailed technical data, stock status, and sourcing information for: MS21125B416
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-197-3983

Item Name Code

29294

Assigment Date

12/21/1984 (41 years ago)

flat chamfer head style, right-hand thread direction, 1.418 inches minimum and 1.438 inches maximum fastener length, 0.277 inches minimum and 0.328 inches maximum thread length, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.277 inches minimum and 0.328 inches maximum
Fastener Length: 1.418 inches minimum and 1.438 inches maximum
Head Style: flat chamfer
Head Diameter: 0.477 inches minimum and 0.492 inches maximum
Head Height: 0.126 inches minimum and 0.141 inches maximum
Locking Feature: detent ball grip
Grip Diameter: 0.2487 inches minimum and 0.2492 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.086 inches maximum first hole
Internal Drive Style: slot
Nominal Thread Diameter: 0.250 inches
Grip Length: 1.000 inches minimum and 1.016 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 63000 pounds per square inch
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.323 inches minimum and 1.343 inches maximum first hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Material: steel comp 631 or steel comp 302 spring
Material: steel comp 632 fastener
Material Document And Classification: ams5673 assn std 1st material response or astm a580 assn std 2nd material response spring
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response overall
Thread Series Designator: unjf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-093-6684	No Name Available	11/01/1991
5305-00-135-9682	No Name Available	10/01/1989

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
MS21125-0416	Close Tolerance Screw
MS21125B416	Close Tolerance Screw
NASM21125B416	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-197-3983?

The FSCG of the NSN 5305-01-197-3983 is 5305

Does the NSN 5305-01-197-3983 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-197-3983 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 5305-01-197-3983 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-197-3983 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 5305-01-197-3983 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Fri, Dec 21, 1984