The Clamp,block, cataloged under National Stock Number 5340-01-648-8540, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-01-648-8540 |
| Primary Part Number | 25-7SF299-1 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Clamping Hole Quantity | 11 |
| Distance From End to First Clamping Hole Center | 1.380 INCHES NOMINAL IN |
| Block Height | 1.120 INCHES NOMINAL1.120 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Clamping Hole Diameter | 1.281 INCHES NOMINAL ALL HOLES IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.310 INCHES NOMINAL0.310 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 1.380 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 25-7SF299-1 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| 25-7SF299-1 | 3/9 Design control — primary reference Beechcraft Corporation Dba Textron Aviation |
NSN 5340-01-648-8540 is a Clamp,block, manufactured by Textron Aviation Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-648-8540 has 1 manufacturer part number on file: 25-7SF299-1 (Textron Aviation Inc).
Key specifications for 25-7SF299-1: Overall Height: 2.250 INCHES NOMINAL2.250 INCHES NOMINAL IN; Clamping Hole Quantity: 11; Distance From End to First Clamping Hole Center: 1.380 INCHES NOMINAL IN; Block Height: 1.120 INCHES NOMINAL1.120 INCHES NOMINAL IN. 9 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.