The Clamp,block, cataloged under National Stock Number 5340-01-678-2520, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is General Dynamics Ordnance and Tactical Systems, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-678-2520 |
| Primary Part Number | SPAL4004652 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | General Dynamics Ordnance and Tactical Systems, Inc. |
| Status | ACTIVE |
| Clamping Hole Quantity | 1 |
| Style Designator | RECTANGULAR |
| Material | PLASTIC |
| 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 |
|---|---|
| SPAL4004652 PRIMARY | General Dynamics Ordnance and Tactical Systems, Inc. (USA) |
| SPAL4004652 | Flyer Defense, Llc (USA) |
NSN 5340-01-678-2520 is a Clamp,block, manufactured by General Dynamics Ordnance and Tactical Systems, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-678-2520 has 2 manufacturer part numbers on file: SPAL4004652 (General Dynamics Ordnance and Tactical Systems, Inc.), SPAL4004652 (Flyer Defense, Llc).
Key specifications for SPAL4004652: Overall Height: 66.00 MILLIMETERS NOMINAL MM; Clamping Hole Quantity: 1; Style Designator: RECTANGULAR; Overall Length: 71.00 MILLIMETERS NOMINAL MM. 3 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.