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MS21921-12D
Military Standard Tube Coupling Nut
Description
Nut
Specifications
| Alternate Part Number | MS21921-12W |
|---|---|
| Diameter C Tolerance | -000 in |
| Dimension A | 1.00 in |
| Dimension A Tolerance | +0.010 in |
| Dimension B | 0.24 in |
| Dimension B Tolerance | +0.010 in |
| Dimension C | 1.240 in |
| Dimension H | 1.250 in |
| End Application | Model ch-47 helicopter |
| Industry Standards/Certification | MIL-S-8879 |
| Material | Aluminum |
| Material Specification | T62 or t851 federal specification single material response t6 qq-a-225/6 |
| NIIN | 00-555-8205 |
| NSN | 4730-00-555-8205 |
| Nut Height | 1.000 |
| Nut Style | Tube coupling |
| Seat Angle | 45.00 degrees |
| Specification Data | 96906-ms21921 government standard |
| Surface Treatment | Anodize |
| Surface Treatment Specification | Caass 1 military specification single treatment response type ii mil-a-8625 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 12 |
| Thread Qty Per Inch (tpi) | 12 |
| Thread Series | UNJ |
| Thread Size | 1.062 |
| Thread T (MIL-S-8879) | 1.0625-12 |
| Tube Outside Diameter | 3/4 in |
| Weight | 0.06 lb |
| Width Across Flats | 1.250 |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21921-12D — functionally equivalent.
- MS21921-12W Listed alternate 1-1/16-12 · Aluminum
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21921-12 MS 1-1/16-12 · Steel
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Catalog data updated 2026-07-05. Report a data error