Boss Nipple

Model / MPN: AS21900-3 | NSN: 4730-00-541-1580

A straight, one-piece fitting used to join two bosses or boss fittings. Both ends are the same size and have external machine threads (straignt threads other than pipe or hose series). It is designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. The center section may be suitably shaped to accommodate a wrench.

Product Details

NATO Stock Number

4730-00-541-1580

Sold in multiples of

1 EA

DEMIL

Thread Class

3a all ends

End Application

Aircraft application

Connection Style

External seat for gasket seal (boss) 2nd end

Connection Style

Flared w/ gasket seal (boss) 1st end

Connection Type

Threaded external boss all ends

Thread Size

0.375 inches all ends

Nominallength

1.156 inches

Material

Steel comp 1137 or steel comp 1141 or steel comp 4130

Material Specification

66 federal standard all material responses

Surface Treatment

Cadmium

Surface Treatment Specification

Qq-p-416, type 1, cl 3 federal specification single treatment response

Style Designator

Flared and flareless w/ center wrenching facility

Thread Series Designator

Unjf all ends

AS21900 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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AS21900-3 Cross Reference

MS21900-3
MILF18280A
MS21900-3