Boss Reducer

Model / MPN: 21433-11 | NSN: 4730-01-392-2426

A straight fitting having a boss connection of a different size at each end. Both connections have external or internal machine threads (straight threads other than pipe or hose series) and are designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. Excludes bushing (as modified).

Product Details

NATO Stock Number

4730-01-392-2426

Sold in multiples of

1 EA

DEMIL

Thread Class

3a 2nd end

Thread Class

3a 1st end

Reducer Type

Concentric

End Application

Aircraft; av-8b, a-7, tav-8b, ta-7

Connection Style

Flared w/ gasket seal (boss) 1st end

Connection Style

Plain (tube) 2nd end

Connection Type

Threaded external tube 1st end

Connection Type

Threaded external tube 2nd end

Thread Size

0.375 inches 2nd end

Thread Size

0.438 inches 1st end

Outside Diameter Tube Accommodated

0.188 inches 2nd end

Outside Diameter Tube Accommodated

0.250 inches 1st end

Nominallength

1.100 inches

Material

Steel comp 304

Surface Treatment

Passivate

Special Test Features

Differentiated by second end altered by removing flared tube portion; gasket seal one end only; 88044-an919-2 (mod) govt standard.

Surface Treatment Specification

Mil-s-5002 military specification single treatment response

Thread Series Designator

Unf 1st end

Thread Series Designator

Unf 2nd end

21433 Series Parts

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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ISO 9001:2015 + AS9120B
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21433-11 Cross Reference

AN919-2J(MOD)
21433-11