fittings › boss nipples
MS21902W4
Military Standard Boss Nipple
Description
Aluminum alloy 7075, tube outside 1/4", union - flareless tube
Specifications
| Alternate Part Number | MS21902D4 |
|---|---|
| Connection Style | External seat for gasket seal (boss) all ends |
| Connection Type | Threaded external boss all ends |
| Material | Aluminum |
| Material Specification | T73 federal specification single material response qq-a-225/9 |
| Maximum Operating Pressure | 3000.0 pounds per square inch single response |
| Maximum Operating Temp | 274.0 degrees fahrenheit single response |
| Media For Which Designed | Hydraulic fluid single response |
| NIIN | 00-451-6047 |
| NSN | 4730-00-451-6047 |
| Nominallength | 1.062 |
| Specification Data | 96906-ms21902 government standard |
| Style Designator | Flareless (tube), Flareless w/ center wrenching facility |
| Surface Treatment | Anodize |
| Surface Treatment Specification | Cl 2 military specification single treatment response type 2 mil-a-8625 |
| 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 all ends |
| Weight | 0.02 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21902W4 — functionally equivalent.
- MS21902D4 Listed alternate
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Catalog data updated 2026-07-05. Report a data error