WC4057-3-6A

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-210-4970

Item Name Code

29294

Assigment Date

06/13/1985 (41 years ago)

3a thread class, flat countersunk head style, 0.766 inches minimum and 0.796 inches maximum fastener length, right-hand thread direction, 0.381 inches minimum and 0.431 inches maximum 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: 3a
Thread Direction: right-hand
Thread Length: 0.381 inches minimum and 0.431 inches maximum
Fastener Length: 0.766 inches minimum and 0.796 inches maximum
Head Style: flat countersunk
Head Diameter: 0.338 inches minimum and 0.381 inches maximum
Grip Diameter: 0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.365 inches minimum and 0.385 inches maximum
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 125000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Material: steel comp xm-13 overall
Material Document And Classification: ams5629 mil spec single material response overall
Surface Treatment: aluminum overall
Surface Treatment Document And Classification: mil-c-83488,type 2 class 3 mil 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Below is a list of NSNs that have been officially superseded by this NSN: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
5305-01-103-8814	No Name Available	09/01/1993

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
11935-3L6	Close Tolerance Screw
HT4057-3-6A	Close Tolerance Screw
ST3M733-3L6	Close Tolerance Screw
WC4057-3-6	Close Tolerance Screw
WC4057-3-6A	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-210-4970?

The FSCG of the NSN 5305-01-210-4970 is 5305

Does the NSN 5305-01-210-4970 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-210-4970 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 5305-01-210-4970 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-210-4970 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 5305-01-210-4970 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Thu, Jun 13, 1985