NAS1603-3

View detailed technical data, stock status, and sourcing information for: NAS1603-3
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-837-8758

Item Name Code

22846

Assigment Date

01/01/1962 (64 years ago)

flat countersunk head style, 0.318 inches minimum and 0.447 inches maximum thread length, 0.578 inches minimum and 0.625 inches maximum fastener length, 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: 0.318 inches minimum and 0.447 inches maximum
Fastener Length: 0.578 inches minimum and 0.625 inches maximum
Head Style: flat countersunk
Head Diameter: 0.376 inches minimum and 0.381 inches maximum
Shoulder Diameter: 0.217 inches minimum and 0.218 inches maximum first shoulder
Shoulder Length: 0.111 inches minimum and 0.133 inches maximum first shoulder
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Countersink Angle: 100.0 degrees nominal
Shoulder Shape: round first shoulder
Material: steel comp e4340 or steel comp 4340 or steel comp 8740 or steel comp 8735 or steel comp 6150 or steel comp 4140 or steel comp 4037 or steel comp 4130 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2,cl 3 fed spec 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
NAS1603-3	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-00-837-8758?

The FSCG of the NSN 5305-00-837-8758 is 5305

Does the NSN 5305-00-837-8758 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-837-8758 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 5305-00-837-8758 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-837-8758 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 5305-00-837-8758 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962