The Clamp,block, cataloged under National Stock Number 5340-01-368-6489, 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 2 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 | 5340-01-368-6489 |
| Primary Part Number | 6661651-1 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Mounting Hole Quantity | 1 |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 6661651-1 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5340-01-368-6489 is a Clamp,block, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-368-6489 has 1 manufacturer part number on file: 6661651-1 (Naval Sea Systems Command).
Key specifications for 6661651-1: Mounting Hole Quantity: 1; Overall Length: 0.970 INCHES NOMINAL IN; Overall Width: 0.910 INCHES NOMINAL IN; Special Features: HOLE .190=32 UNF-3B X .44 MIN THD DP,HOLE DEPTH .75 MAX CSK 90 DEGREE NOMINAL X DIA.22 NOMINAL. 2 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.