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MS21921-4
Military Standard Tube Coupling Nut
Description
outside diameter: 1/4", sleeve coupling, flareless, carbon steel, MS21921 series nut
Specifications
| End Application | 2350-01-031-0586 |
|---|---|
| Material | Steel |
| Nut Height | 0.720 |
| Nut Style | Tube coupling |
| Seat Angle | 45.00 degrees |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.438 |
| Width Across Flats | 0.562 |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21921-4 — functionally equivalent.
- MS21921V4P Listed alternate 7/16-20 · Steel
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21921-4D MS 7/16-20 · Aluminum
- MS21921-4J MS 7/16-20 · CRES
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Catalog data updated 2026-07-05. Report a data error