The Clamp,synchro, cataloged under National Stock Number 5340-01-272-5656, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-272-5656 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Length | 1.800 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/4,TEMPER 4 FED SPEC SINGLE MATERIAL RESPONSE |
| Height | 0.215 INCHES NOMINAL IN |
| Width | 0.750 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 |
| Furnished Items | LOCKNUT |
| Hole Diameter | 0.189 INCHES NOMINAL IN |
| 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 |
|---|---|
| 39921 | C/1 Advisory reference — outside the item-of-supply concept Siemens Water Technologies Corp. Div Wallace & Tiernan Products |
| 39921 | 5/9 Secondary reference U.S. Government activity |
| 39921 | 3/9 Design control — primary reference Joint Oil Analysis Program Dba Department of Defense |
NSN 5340-01-272-5656 is a Clamp,synchro, classified under FSC 5340, Hardware, Commercial. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-335-4846, 5365-01-470-8183, 5365-01-479-5989. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-01-272-5656: Length: 1.800 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/4,TEMPER 4 FED SPEC SINGLE MATERIAL RESPONSE; Height: 0.215 INCHES NOMINAL IN; Width: 0.750 INCHES NOMINAL IN. 7 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.