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MS21921-8J
Military Standard Tube Coupling Nut
Description
Nut
Specifications
| Criticality Code Justification | Feat |
|---|---|
| Diameter C Tolerance | -000 in |
| Dimension A | 0.86 in |
| Dimension A Tolerance | +0.010 in |
| Dimension B | 0.18 in |
| Dimension B Tolerance | +0.010 in |
| Dimension C | 0.865 in |
| Dimension H | 7/8 in |
| End Application | Sh-60f asw carrier based helicopter. mh-53e helicopter. tf-33-p-7 (c-141 a/b) aircraft engine. lamps mk iii landing system helicopter. ec-135h/k/p) b-52h) aircraft engine. tf33-pw-102 (c-135e rtf33-p-3/5/9 (c/ec-135 |
| Industry Standards/Certification | MIL-S-8879 |
| Material | CRES |
| Material Specification | 66 federal standard single material response |
| NIIN | 00-859-3517 |
| NSN | 4730-00-859-3517 |
| Nut Height | 0.86 |
| Nut Style | Tube coupling |
| Seat Angle | 45 degrees |
| Special Features | Weapon system essential |
| Specification Data | 96906-ms21921 government standard |
| Surface Treatment | Passivate |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 16 |
| Thread Qty Per Inch (tpi) | 16 |
| Thread Series | UNJ |
| Thread Size | 0.75 |
| Thread T (MIL-S-8879) | 0.7500-16 |
| Tube Outside Diameter | 1/2 in |
| Weight | 0.07 lb |
| Width Across Flats | 0.875 |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21921-8 MS 3/4-16 · Steel
- MS21921-8D MS 3/4-16 · Aluminum
- MS21921-8K MS 3/4-16 · CRES
- MS21921-8W MS 3/4-16 · Aluminum
- MS21921V8P MS 3/4-16 · CRES
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Catalog data updated 2026-07-05. Report a data error