The Clamp,loop, cataloged under National Stock Number 5340-01-055-9990, 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 9 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-055-9990 |
| Primary Part Number | S280D15 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Style Designator | OFFSET MOUNT |
| Diameter | 0.205 INCHES NOMINAL IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| Distance From Loop Center to Tongue End | 1.084 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE BAND |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.866 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE CUSHION |
| Loop Inside Diameter | 0.937 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 |
|---|---|
| S280D15 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| JM44LC9D15T | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 5340PL0846596 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5340PL1803661 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 477-15 | 5/2 Secondary reference U.S. Government activity |
| 5340PL1691357 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| TA11C44D15T | 5/2 Secondary reference U.S. Government activity |
| C2874D15 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5340-01-055-9990 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-055-9990 has 2 manufacturer part numbers on file: S280D15 (Umpco, Inc. Dba Umpco Inc), JM44LC9D15T (J & M Products, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-090-3932. Verify interchangeability with system specifications before substitution.
Key specifications for S280D15: Style Designator: OFFSET MOUNT; Diameter: 0.205 INCHES NOMINAL IN; Overall Width: 0.500 INCHES NOMINAL IN; Material Thickness: 0.050 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.