3M50-4-20

View detailed technical data, stock status, and sourcing information for: 3M50-4-20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-242-4637

Item Name Code

22846

Assigment Date

06/03/1973 (53 years ago)

1.703 inches minimum and 1.750 inches maximum fastener length, 3a thread class, 0.443 inches minimum and 0.510 inches maximum thread length, right-hand thread direction, flat countersunk head style

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: 0.443 inches minimum and 0.510 inches maximum
Fastener Length: 1.703 inches minimum and 1.750 inches maximum
Head Style: flat countersunk
Head Diameter: 0.502 inches minimum and 0.507 inches maximum
Shoulder Diameter: 0.264 inches minimum and 0.265 inches maximum first shoulder
Shoulder Length: 1.173 inches minimum and 1.195 inches maximum first shoulder
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
Countersink Angle: 100.0 degrees nominal
Shoulder Shape: round first shoulder
Special Features: furnish with one o-ring 7m80
Material: steel overall
Material Document And Classification: 3-52 fscm 76301 mfr ref single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: 3-52 fscm 76301 mfr ref single treatment response overall
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
3M50-4-20	Shoulder Screw
54267-4-20	Shoulder Screw
HT409A4-20	Shoulder Screw
HT41UA20	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-00-242-4637?

The FSCG of the NSN 5305-00-242-4637 is 5305

Does the NSN 5305-00-242-4637 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-242-4637 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 5305-00-242-4637 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-242-4637 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 5305-00-242-4637 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Sun, Jun 3, 1973