NAS1831B3B21

View detailed technical data, stock status, and sourcing information for: NAS1831B3B21
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-01-396-7427

Item Name Code

40280

Assigment Date

09/23/1994 (31 years ago)

A component of a fluid filter designed to contain the inlet and/or outlet ports of the filter. It acts as a cover and attaches to the fluid filter body or mounts directly to an integral cavity in an engine, manifold, casing, or the like. The item may include relief, check, by-pass valves, and/or fluid filter element(s). It may have means for supporting the filter element(s), and means for mounting the filter. Excludes:head, sediment strainer and cover, fluid filter.

right-hand right internal thread direction, hexagon cross-sectional shape, 40 right internal thread quantity per inch, 3b right internal thread class, 0.188 inches nominal width across flats

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 right internal
Thread Direction: right-hand right internal
Cross-Sectional Shape: hexagon
Width Across Flats: 0.188 inches nominal
Thread Quantity Per Inch: 40 right internal
Nominal Thread Size: 0.112 inches right internal
Special Features: material: copper alloy overall;surface treatment: cadmium overall;bearing surface type: flat
Thread Series Designator: unc left internal (includes thru thread)

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
NAS1831B3B21	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-01-396-7427?

The FSCG of the NSN 5340-01-396-7427 is 5340

Does the NSN 5340-01-396-7427 have a Schedule B code assigned?

Yes, the Schedule B code is 7415290000

Does NSN 5340-01-396-7427 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 5340-01-396-7427 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-01-396-7427 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 5340-01-396-7427 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Fri, Sep 23, 1994