The Clamp,block,section, cataloged under National Stock Number 5340-01-366-5591, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-366-5591 |
| Primary Part Number | 8909-112-008 |
| Item Name | Clamp,block,section |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 11 |
| Distance From End to First Clamping Hole Center | 4.500 INCHES NOMINAL IN |
| Block Height | 4.000 INCHES NOMINAL4.000 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Material Document and Classification | ASTM A311,GR 1018 FL BR ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.781 INCHES NOMINAL0.781 INCHES NOMINAL IN |
| Clamping Hole Diameter | 5.000 INCHES MINIMUM AND 5.005 INCHES MAXIMUM SINGLE HOLE IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.750 INCHES NOMINAL0.750 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 1.000 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Material | STEEL |
| 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 |
|---|---|
| 8909-112-008 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 8909-112-008 | 5/9 Secondary reference Entwistle Co the Defense Technology Div |
NSN 5340-01-366-5591 is a Clamp,block,section, manufactured by The Entwistle Company Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-366-5591 has 1 manufacturer part number on file: 8909-112-008 (The Entwistle Company Llc).
Key specifications for 8909-112-008: Mounting Hole Quantity: 22; Clamping Hole Quantity: 11; Distance From End to First Clamping Hole Center: 4.500 INCHES NOMINAL IN; Block Height: 4.000 INCHES NOMINAL4.000 INCHES NOMINAL IN. 12 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.