S4956891-3-12

View detailed technical data, stock status, and sourcing information for: S4956891-3-12
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-01-416-9972

Item Name Code

40280

Assigment Date

07/28/1995 (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 left internal (includes thru thread) thread direction, right-hand right internal thread direction, 0.250 inches nominal left internal (includes thru thread) thread length, 3b left internal (includes thru thread) thread class, 3b right internal 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: 3b left internal (includes thru thread)
Thread Class: 3b right internal
Thread Direction: right-hand right internal
Thread Direction: right-hand left internal (includes thru thread)
Thread Length: 0.250 inches nominal left internal (includes thru thread)
Thread Length: 0.250 inches nominal right internal
Length: 0.745 inches minimum and 0.755 inches maximum
Cross-Sectional Shape: hexagon
Width Across Flats: 0.188 inches nominal
Thread Quantity Per Inch: 40 left internal (includes thru thread)
Thread Quantity Per Inch: 40 right internal
Nominal Thread Size: 0.112 inches left internal (includes thru thread)
Nominal Thread Size: 0.112 inches right internal
Material: aluminum alloy 2024 overall
Material Document And Classification: qq-a-225/6 t4 fed spec single material response overall
Surface Treatment: chromate overall
Surface Treatment Document And Classification: mil-c-5541 mil spec single treatment response overall
Style Designator: left internal and right internal threads
Thread Series Designator: unc left internal (includes thru thread)
Thread Series Designator: unc right internal

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
S4956891-3-12	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-01-416-9972?

The FSCG of the NSN 5340-01-416-9972 is 5340

Does NSN 5340-01-416-9972 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 5340-01-416-9972 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-01-416-9972 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5340-01-416-9972 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Fri, Jul 28, 1995