5305-00-228-6721

Find complete technical information, availability, and procurement data for: 5305-00-228-6721
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-228-6721

Item Name Code

06657

Assigment Date

05/17/1973 (53 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

0.406 inches minimum and 0.437 inches maximum fastener length, right-hand thread direction, 0.344 inches minimum and 0.437 inches maximum thread length, hexagon head style, 2a thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.344 inches minimum and 0.437 inches maximum
Fastener Length: 0.406 inches minimum and 0.437 inches maximum
Head Style: hexagon
Head Height: 0.080 inches minimum and 0.090 inches maximum
Width Between Flats: 0.240 inches minimum and 0.250 inches maximum
Nominal Thread Diameter: 0.138 inches
Thread Quantity Per Inch: 32
Screw Material: steel comp 304 or steel comp 316
Screw Material Document And Classification: qq-s-763 fed spec single material response
Screw Surface Treatment: passivate and oxide
Screw Surface Treatment Document And Classification: qq-p-35 fed spec 1st treatment response or mil-c13924 mil spec 2nd treatment response
Thread Series Designator: unc

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
SM-B-745228	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-228-6721?

The FSCG of the NSN 5305-00-228-6721 is 5305

Does the NSN 5305-00-228-6721 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-228-6721 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 5305-00-228-6721 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-228-6721 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 5305-00-228-6721 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Thu, May 17, 1973