fittings › threaded tube fitting plugs
MS21913-4
Military Standard Threaded Tube Fitting Plug
Description
SUPERSEDED BY PART NUMBER: MS21913V4P, outside diameter: 1/4, MS21913 series fitting
Specifications
| Connection Style | Flareless |
|---|---|
| Head Height | 0.203 |
| Material | Steel |
| Overall Length | 0.640 |
| Style Designator | Tube fitting flareless (note: drilled hole is optional should not be considered as a separating characteristic) plug |
| Thread Class | 3a external |
| Thread Direction | Right-hand external |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 external |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) external |
| Thread Size | 0.437 inches external |
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 MS21913-4 — functionally equivalent.
- MS21913V4P Listed alternate 7/16 in · CRES
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Catalog data updated 2026-07-05. Report a data error