The Clamp,synchro, cataloged under National Stock Number 5340-01-396-7261, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 15 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-396-7261 |
| Primary Part Number | 803-6397421 PC 49 |
| Item Name | Clamp,synchro |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length | 3.125 INCHES NOMINAL IN |
| Style Designator | SQUARE |
| Material Document and Classification | ASTM A240 ASSN STD SINGLE MATERIAL RESPONSE |
| Effective Length | 1.878 INCHES NOMINAL IN |
| Nominal Thread Size | 0.562 INCHES IN |
| Effective Height | 0.625 INCHES NOMINAL IN |
| Height | 1.045 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 2.500 INCHES NOMINAL IN |
| Width | 1.246 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 410 |
| Thread Series Designator | UNF |
| Hole Diameter | 0.562 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM 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 |
|---|---|
| 803-6397421 PC 49 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5340-01-396-7261 is a Clamp,synchro, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-396-7261 has 1 manufacturer part number on file: 803-6397421 PC 49 (Naval Sea Systems Command).
Key specifications for 803-6397421 PC 49: Length: 3.125 INCHES NOMINAL IN; Style Designator: SQUARE; Material Document and Classification: ASTM A240 ASSN STD SINGLE MATERIAL RESPONSE; Effective Length: 1.878 INCHES NOMINAL IN. 15 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.