fittings › boss reducers
MS21916J6-4
Military Standard Boss Reducer
Description
3/8" to 1/4", reducer, external thread, flareless, corrosion resistant steel, ms21916 series fitting
Specifications
| Connection Type | Threaded external boss all ends |
|---|---|
| Nominallength | 1.219 |
| Special Features | Material: steel comp 304 ; connection style:external seat for gasket seal all ends; material document and classification: 66 federal standard single material response . |
| Specification Data | 81343-as21916 professional/industrial association specification |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Mil-s-5002 military specification single treatment response inside, Type 2 military specification single treatment response outside e300 mil-f-14072 |
| Thread Class | 3a all ends |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) all ends |
| Thread Size | 0.438 inches 2nd end, 0.562 inches 1st end |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error