CHT4020-3-8A

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-076-6316

Item Name Code

29294

Assigment Date

05/09/1979 (47 years ago)

0.390 inches minimum and 0.437 inches maximum thread length, 0.890 inches minimum and 0.937 inches maximum fastener length, flat countersunk undercut head style, 3a thread class, right-hand thread direction

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: 0.390 inches minimum and 0.437 inches maximum
Fastener Length: 0.890 inches minimum and 0.937 inches maximum
Head Style: flat countersunk undercut
Head Diameter: 0.3765 inches minimum and 0.3813 inches maximum
Head Height: 0.0439 inches minimum and 0.0459 inches maximum
Grip Diameter: 0.1890 inches minimum and 0.1895 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.500 inches nominal
Features Provided: o ring
Thread Quantity Per Inch: 32
Countersink Angle: 100.0 degrees nominal
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel corrosion resisting fastener
Material Document And Classification: ams 5629 assn std single material response fastener
Material Document And Classification: mil-r-25988 ty 1,cl 1,grade 70 mil spec single material response primary washer
Surface Treatment: passivate fastener
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response fastener
Thread Series Designator: unjf

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
11925C3-8A	Close Tolerance Screw
642AS0738	Close Tolerance Screw
642AS0738-1	Close Tolerance Screw
CHT4020-3-8A	Close Tolerance Screw
HT4020-3-8A	Close Tolerance Screw
ST3M652C3-8A	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-076-6316?

The FSCG of the NSN 5305-01-076-6316 is 5305

Does the NSN 5305-01-076-6316 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-076-6316 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 5305-01-076-6316 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-076-6316 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 5305-01-076-6316 was assigned to the Federal Catalog?

It was assigned 47 years ago, on Wed, May 9, 1979