The Clamp,synchro, cataloged under National Stock Number 5340-00-381-1884, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-381-1884 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Length | 0.303 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE |
| Material Document and Classification | QQ-S-766,TEMPER 1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE |
| Nominal Thread Size | 0.112 INCHES IN |
| Height | 0.132 INCHES NOMINAL IN |
| Color | BLACK |
| Surface Treatment | OXIDE |
| Width | 0.280 INCHES NOMINAL IN |
| Thread Class | 2B |
| Material | STEEL COMP 302 |
| Thread Series Designator | UNF |
| Furnished Items | LOCKNUT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| 643021 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 643021 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5340-00-381-1884 is a Clamp,synchro, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-381-1884: Length: 0.303 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-13924,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: QQ-S-766,TEMPER 1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE; Nominal Thread Size: 0.112 INCHES IN. 12 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.