The Clamp,loop, cataloged under National Stock Number 5340-00-241-6691, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-241-6691 |
| Primary Part Number | S280SS5 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Cushioning Environmental Protection | HEAT |
| Style Designator | OFFSET MOUNT |
| Material Document and Classification | AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE CUSHION |
| Diameter | 0.201 INCHES MINIMUM AND 0.209 INCHES MAXIMUM IN |
| Material Thickness | 0.025 INCHES NOMINAL IN |
| Distance From Loop Center to Tongue End | 0.686 INCHES NOMINAL IN |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.498 INCHES NOMINAL IN |
| Material | STEEL COMP 301 OR STEEL COMP 302 BAND |
| Material | PLASTIC TETRAFLUOROETHYLENE CUSHION |
| Loop Inside Diameter | 0.313 INCHES NOMINAL IN |
| 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 |
|---|---|
| S280SS5 | Umpco, Inc. Dba Umpco Inc (USA) |
| JM43LC6SH5T | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| C2874C5 | 3/2 Design control — primary reference U.S. Government activity |
| 477SS5 | 5/2 Secondary reference U.S. Government activity |
| TA11C44SS5T | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-241-6691 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-241-6691 has 2 manufacturer part numbers on file: S280SS5 (Umpco, Inc. Dba Umpco Inc), JM43LC6SH5T (J & M Products, Inc).
Key specifications for S280SS5: Cushioning Environmental Protection: HEAT; Style Designator: OFFSET MOUNT; Material Document and Classification: AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE CUSHION; Diameter: 0.201 INCHES MINIMUM AND 0.209 INCHES MAXIMUM 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.