MS51991-106

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5325 Fastening Devices

National Stock Number

5325-00-158-4053

Item Name Code

11444

Assigment Date

04/28/1971 (55 years ago)

A gage employing a vernier type slide specially designed as a maintenance tool to measure the amount of erosion of the bore diameter of a cannon (as modified). It may include a case. See also borescope.

0.500 inches nominal length, 0.4450 inches minimum and 0.4750 inches maximum thread length, 0.375-16 unc class 3a insert size, right-hand thread direction, 3b 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
Thread Direction: right-hand
Thread Length: 0.4450 inches minimum and 0.4750 inches maximum
Length: 0.500 inches nominal
Insert Size: 0.375-16 unc class 3a
Thread Quantity Per Inch: 14
Nominal Thread Size: 0.4375 inches
Material: steel comp 1117 overall
Material Document And Classification: aisi assn std single material response overall
Style Designator: serrated
Thread Series Designator: unjc

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
MS51991-106	Screw Thread Insert
RJ106SB8	Screw Thread Insert

FAQs

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

What is the FSCG of the NSN 5325-00-158-4053?

The FSCG of the NSN 5325-00-158-4053 is 5325

Does the NSN 5325-00-158-4053 have a Schedule B code assigned?

Yes, the Schedule B code is 9606100000

Does NSN 5325-00-158-4053 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 5325-00-158-4053 contain precious materials?

Item does not contain precious metal.

Does NSN 5325-00-158-4053 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 5325-00-158-4053 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Apr 28, 1971