fittings › tube caps
MS21914-4D
Cap
Description
*Superseded by part number MS21914-4W* Diameter: 1/4", pressure seal, flareless tube, aluminum alloy, MS21914 series cap
Specifications
| Alternate Part Number | MS21914-4W |
|---|---|
| Connection Style | Pressure seal flared |
| Diameter C | 0.371 in |
| Diameter C Tolerance | +0.005 in |
| Dimension A | 0.745 in |
| Dimension A Tolerance | +0.010 in |
| Dimension H | 0.600 in |
| Dimension H Tolerance | +0.010 in |
| Industry Standards/Certification | MIL-S-8879 |
| Material | Aluminum |
| NIIN | 00-958-3704 |
| NSN | 4730-00-958-3704 |
| Reference B | 0.562 in |
| Reference L | 0.893 in |
| Specification Data | 96906-ms21914 government standard |
| Style Designator | Flared tube cap |
| Surface Treatment | Anodize |
| Surface Treatment Specification | Type 2 military specification single treatment response head mil-a-8625 |
| Thread Class | 3b internal |
| Thread Direction | Right-hand internal |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) internal |
| Thread Size | 0.438 inches internal |
| Thread T (MIL-S-8879) | 0.4375-20 |
| Tube Outside Diameter | 1/4 in |
| Tube Outside Diameter For Which Designed | 0.250 |
| Weight | 0.0145 lb |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21914-4D — functionally equivalent.
- MS21914-4W Listed alternate 7/16 in · Aluminum
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error