The Clamp,block, cataloged under National Stock Number 5340-01-660-4000, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Stauff Corp. Government technical data includes 11 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 | 5340-01-660-4000 |
| Primary Part Number | 428-PP |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Stauff Corp |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 11 |
| Distance From End to First Clamping Hole Center | 1.160 INCHES NOMINAL IN |
| Block Height | 0.815 INCHES NOMINAL0.815 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Center to Center Distance Between First and Third Mounting Holes | 1.570 INCHES NOMINAL1.570 INCHES NOMINAL IN |
| Clamping Hole Diameter | 28.0 MILLIMETERS NOMINAL SINGLE HOLE MM |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.590 INCHES NOMINAL0.590 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 0.375 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Material | PLASTIC POLYPROPYLENE |
| 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 |
NSN 5340-01-660-4000 is a Clamp,block, manufactured by Stauff Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-660-4000 has 2 manufacturer part numbers on file: 428-PP (Stauff Corp), 02312354 (Grove U.s. Llc Dba Grove Us Llc).
Key specifications for 428-PP: Mounting Hole Quantity: 22; Overall Height: 1.650 INCHES NOMINAL1.650 INCHES NOMINAL IN; Clamping Hole Quantity: 11; Distance From End to First Clamping Hole Center: 1.160 INCHES NOMINAL IN. 11 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.