The Clamp,synchro, cataloged under National Stock Number 5340-01-623-7609, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-01-623-7609 |
| Primary Part Number | 4951990-9 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| 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 |
|---|---|
| 4951990-9 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| 4951990-9 | Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics (USA) |
| Reference | Meaning |
|---|---|
| 4P99010-195A | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5340-01-623-7609 is a Clamp,synchro, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-623-7609 has 2 manufacturer part numbers on file: 4951990-9 (Rtx Corporation Div Pratt & Whitney), 4951990-9 (Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics).
Key specifications for 4951990-9: End Item Identification: C-5M. 0 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.