The Clamp,synchro, cataloged under National Stock Number 5340-01-131-3381, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Mjt Holdings Llc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5340-01-131-3381 |
| Primary Part Number | FC-4 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Mjt Holdings Llc |
| Status | ACTIVE |
| Length | 1.250 INCHES NOMINAL IN |
| Height | 0.375 INCHES NOMINAL IN |
| Width | 1.172 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | LOCKNUT |
| Hole Diameter | 0.375 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 |
| Part Number | Manufacturer |
|---|---|
| FC-4 PRIMARY | Mjt Holdings Llc (USA) |
NSN 5340-01-131-3381 is a Clamp,synchro, manufactured by Mjt Holdings Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-131-3381 has 1 manufacturer part number on file: FC-4 (Mjt Holdings Llc).
3 possible matches (shared part number, not a government interchangeability claim): 3431-01-352-3675, 6515-01-471-7663, 7720-01-650-5930. Verify interchangeability with system specifications before substitution.
Key specifications for FC-4: Length: 1.250 INCHES NOMINAL IN; Height: 0.375 INCHES NOMINAL IN; Width: 1.172 INCHES NOMINAL IN; Material: STEEL. 6 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.