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MS21916D10-6 Boss Reducer

4730-00-640-5856

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Official Item Classification

Name
Boss Reducer
Part Number
MS21916D10-6
(NSN) National Stock Number
4730-00-640-5856
(FSG) Federal Supply Group
47 Pipe, Tubing, Hose, And Fittings
(INC) Item Name Code
23541
(FIIG) Federal Item Identification Guide
A080B0
Date
01/01/1961 (65 years ago)

3a all ends thread class, concentric reducer type, threaded external boss all ends connection type, external seat for gasket seal (boss) all ends connection style, helicopter, model ch-47 end item identification

Specs & Compatibility

Thread Class

3a all ends

Reducer Type

concentric

End Item Identification

helicopter, model ch-47

Connection Style

external seat for gasket seal (boss) all ends

Connection Type

threaded external boss all ends

Nominal Thread Size

0.562 inches 2nd end

Nominal Thread Size

0.875 inches 1st end

Nominal Overall Length

1.625 inches

Material

aluminum alloy 2024 overall

Material Document And Classification

qq-a-225/6,t6 fed spec single material response overall

Media For Which Designed

hydraulic fluid single response

Surface Treatment

anodize overall

Surface Treatment Document And Classification

mil-a-8625 mil spec single treatment response overall

Thread Series Designator

unjf all ends

Specification/Standard Data

96906-ms21916 government standard

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0023541

Related Hardware Products

Part Number Description
ER919D10-6 Boss Reducer
MS21916D10-6 Boss Reducer

Frequently Asked Questions

What is the FSCG of the NSN 4730-00-640-5856?
The FSCG of the NSN 4730-00-640-5856 is 4730
Does the NSN 4730-00-640-5856 have a Schedule B code assigned?
Yes, the Schedule B code is 7609000000
Does NSN 4730-00-640-5856 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 4730-00-640-5856 contain precious materials?
Precious metal content is unknown
Does NSN 4730-00-640-5856 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 4730-00-640-5856 was assigned to the Federal Catalog?
It was assigned 65 years ago, on Sun, Jan 1, 1961