The Clamp,synchro, cataloged under National Stock Number 5340-01-288-9331, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Kelsey-Hayes Co Gunite Div. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-288-9331 |
| Primary Part Number | W-1138 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Kelsey-Hayes Co Gunite Div |
| Status | ACTIVE |
| Width | 4.000 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 |
NSN 5340-01-288-9331 is a Clamp,synchro, manufactured by Kelsey-Hayes Co Gunite Div, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-288-9331 has 2 manufacturer part numbers on file: W-1138 (Kelsey-Hayes Co Gunite Div), 2DB874 (Oshkosh Defense Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-426-8623. Verify interchangeability with system specifications before substitution.
Key specifications for W-1138: Width: 4.000 INCHES NOMINAL IN. 1 specification is 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.