5305-01-321-2391

Find complete technical information, availability, and procurement data for: 5305-01-321-2391
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-321-2391

Item Name Code

16282

Assigment Date

06/14/1990 (36 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

flat countersunk head style, 3a thread class, 0.346 inches minimum and 0.429 inches maximum thread length, right-hand thread direction, 0.470 inches minimum and 0.500 inches maximum fastener 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: 0.346 inches minimum and 0.429 inches maximum
Fastener Length: 0.470 inches minimum and 0.500 inches maximum
Head Style: flat countersunk
Head Diameter: 0.359 inches minimum and 0.411 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.190 inches
Width Across Flats: 0.125 inches nominal
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 180000 pounds per square inch
Hardness Rating: 39.0 rockwell c minimum and 45.0 rockwell c maximum overall
Countersink Angle: 80.0 degrees minimum and 82.0 degrees maximum
Material: steel overall
Material Document And Classification: astm a574, 1300 series assn std all material responses overall
Surface Treatment: zinc and chromate overall
Surface Treatment Document And Classification: astm a633 ty 2 cl 3 assn std single treatment response overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 4 type

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
317209-A-042	Socket Head Cap Screw
3176209-A-042	Socket Head Cap Screw
NS24667-20Z	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-321-2391?

The FSCG of the NSN 5305-01-321-2391 is 5305

Does the NSN 5305-01-321-2391 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-321-2391 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 5305-01-321-2391 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-321-2391 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 5305-01-321-2391 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Thu, Jun 14, 1990