A3131745-4

View detailed technical data, stock status, and sourcing information for: A3131745-4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-399-0473

Item Name Code

22846

Assigment Date

11/16/1994 (31 years ago)

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes:items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).

right-hand thread direction, 2a thread class, 0.308 inches nominal fastener length, hexagon head style, 0.245 inches nominal 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: 2a
Thread Direction: right-hand
Thread Length: 0.245 inches nominal
Fastener Length: 0.308 inches nominal
Head Style: hexagon
Head Height: 0.063 inches nominal
Width Between Flats: 0.218 inches nominal
Shoulder Length: 0.085 inches nominal first shoulder
Shoulder Width Across Flats: 0.147 inches nominal first shoulder
Internal Drive Style: w/o internal drive
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Shoulder Shape: square first shoulder
Material: steel corrosion resisting overall
Material Document And Classification: qq-s-763 assn std 1st material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 assn std 1st 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
39616-100	Shoulder Screw
A3131745-4	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-01-399-0473?

The FSCG of the NSN 5305-01-399-0473 is 5305

Does the NSN 5305-01-399-0473 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-399-0473 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 5305-01-399-0473 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-399-0473 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 5305-01-399-0473 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Wed, Nov 16, 1994