324-0303-000

View detailed technical data, stock status, and sourcing information for: 324-0303-000
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-637-4225

Item Name Code

16282

Assigment Date

01/01/1961 (65 years ago)

0.547 inches minimum and 0.579 inches maximum fastener length, 3a thread class, flat chamfer head style, right-hand thread direction, 0.497 inches minimum and 0.547 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: 0.497 inches minimum and 0.547 inches maximum
Fastener Length: 0.547 inches minimum and 0.579 inches maximum
Head Style: flat chamfer
Head Diameter: 0.176 inches minimum and 0.183 inches maximum
Head Height: 0.108 inches minimum and 0.112 inches maximum
Spline Minor Diameter: 0.080 inches minimum and 0.082 inches maximum
Spline Major Diameter: 0.097 inches minimum and 0.098 inches maximum
Spline Width: 0.021 inches minimum and 0.022 inches maximum
Internal Drive Style: six spline
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 45.0 rockwell c maximum overall
Minimum Yield Strength: 130000 pounds per square inch
Material: steel overall
Material Document And Classification: 66 fed std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 type 2 class 3 fed spec all treatment responses overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 3 type

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-297-9173	No Name Available	01/12/1970
5305-00-576-0888	Socket Head Cap Screw	07/01/2025

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
324-0303-00	Socket Head Cap Screw
324-0303-000	Socket Head Cap Screw
324-0666-00	Socket Head Cap Screw
4-40X9-166SPLIN	Socket Head Cap Screw
B2A440-9C1	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-637-4225?

The FSCG of the NSN 5305-00-637-4225 is 5305

Does the NSN 5305-00-637-4225 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-637-4225 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 5305-00-637-4225 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-637-4225 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 5305-00-637-4225 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961