8391679

View detailed technical data, stock status, and sourcing information for: 8391679
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-174-1940

Item Name Code

22846

Assigment Date

01/01/1963 (63 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes:bolt, internal wrenching and screw, cap, socket head.

0.531 inches minimum thread length, 3a thread class, 1.844 inches nominal fastener length, right-hand thread direction, flat chamfer head style

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: 0.531 inches minimum
Fastener Length: 1.844 inches nominal
Head Style: flat chamfer
Head Diameter: 0.739 inches minimum and 0.750 inches maximum
Head Height: 0.306 inches minimum and 0.312 inches maximum
Shoulder Diameter: 0.4960 inches minimum and 0.4980 inches maximum first shoulder
Shoulder Length: 0.937 inches nominal first shoulder
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.375 inches
Width Across Flats: 0.250 inches minimum and 0.252 inches maximum
Thread Quantity Per Inch: 16
Shoulder Shape: round first shoulder
Material: steel comp 4140 or steel comp 8640 or steel comp 8740 overall
Material Document And Classification: qq-s-624 fed spec all material responses overall
Surface Treatment: paint overall
Surface Treatment Document And Classification: mil-c-12986 ty 8 mil spec single treatment response overall
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
8391679	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-00-174-1940?

The FSCG of the NSN 5305-00-174-1940 is 5305

Does the NSN 5305-00-174-1940 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-174-1940 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 5305-00-174-1940 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-174-1940 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 5305-00-174-1940 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963