The Clamp,block, cataloged under National Stock Number 5340-01-606-2536, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Jcb Inc.. Government technical data includes 4 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-606-2536 |
| Primary Part Number | 821/00251 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Jcb Inc. |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 22 |
| Style Designator | RECTANGULAR |
| Clamping Hole Diameter | 20.00 MILLIMETERS NOMINAL ALL HOLES MM |
| 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 |
|---|---|
| 821/00251 PRIMARY | Jcb Inc. (USA) |
NSN 5340-01-606-2536 is a Clamp,block, manufactured by Jcb Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-606-2536 has 1 manufacturer part number on file: 821/00251 (Jcb Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-611-7089. Verify interchangeability with system specifications before substitution.
Key specifications for 821/00251: Mounting Hole Quantity: 22; Overall Height: 37.00 MILLIMETERS NOMINAL37.00 MILLIMETERS NOMINAL MM; Clamping Hole Quantity: 22; Style Designator: RECTANGULAR. 4 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.