5305-01-279-2330

Find complete technical information, availability, and procurement data for: 5305-01-279-2330
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-279-2330

Item Name Code

06657

Assigment Date

05/16/1988 (38 years ago)

An externally threaded fastener bent approximately 180 degrees (3.141 radians) in the shape of the letter u and with both ends threaded.

flat countersunk head style, 0.401 inches minimum and 0.451 inches maximum thread length, 2.161 inches minimum and 2.191 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: 0.401 inches minimum and 0.451 inches maximum
Fastener Length: 2.161 inches minimum and 2.191 inches maximum
Head Style: flat countersunk
Head Diameter: 0.461 inches minimum and 0.507 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Screw Material: steel comp 4140 or steel comp 4340 or steel comp 8740
Screw Material Document And Classification: mil-s-5626 mil spec 1st material response or ams 6414 assn std 2nd material response or mil-s-8844 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response
Screw Surface Treatment: cadmium and chromate
Screw Surface Treatment Document And Classification: qq-p-416,type class 2 fed spec single treatment response
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas1221 professional/industrial association standard

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
NAS1221-4-28	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-279-2330?

The FSCG of the NSN 5305-01-279-2330 is 5305

Does the NSN 5305-01-279-2330 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-279-2330 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 5305-01-279-2330 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-279-2330 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 5305-01-279-2330 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Mon, May 16, 1988