The Clamp,loop, cataloged under National Stock Number 5340-01-552-1601, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Umpco, Inc. Dba Umpco Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-552-1601 |
| Primary Part Number | S656SS3 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Special Test Features | LOOP INSIDE DIAMETER 0.187 |
| 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 |
|---|---|
| S656SS3 | Umpco, Inc. Dba Umpco Inc (USA) |
| JM44LC90SS3PB | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 11437SS3PB | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-552-1601 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-552-1601 has 2 manufacturer part numbers on file: S656SS3 (Umpco, Inc. Dba Umpco Inc), JM44LC90SS3PB (J & M Products, Inc).
Key specifications for S656SS3: Special Test Features: LOOP INSIDE DIAMETER 0.187. 1 specification is 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.