The Clamp,synchro, cataloged under National Stock Number 5340-01-631-2968, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Bird-Johnson Propeller Company, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 — Hardware, Commercial (FSG 53) |
| Manufacturers | Bird-Johnson Propeller Company, Llc (CAGE 07309) |
| Parameter | Value |
|---|---|
| NSN | 5340-01-631-2968 |
| Primary Part Number | NMM200847-001 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Bird-Johnson Propeller Company, Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| NMM200847-001 PRIMARY | Bird-Johnson Propeller Company, Llc (USA) |
| NMM220180 REV B FIND NO. 16 | Bird-Johnson Propeller Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| NMM220180 | D/9 Drawing number reference only Bird-Johnson Propeller Company, Llc |
NSN 5340-01-631-2968 is a Clamp,synchro, manufactured by Bird-Johnson Propeller Company, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-631-2968 has 2 manufacturer part numbers on file: NMM200847-001 (Bird-Johnson Propeller Company, Llc), NMM220180 REV B FIND NO. 16 (Bird-Johnson Propeller Company, Llc).
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.