The Clamp,loop, cataloged under National Stock Number 5340-00-990-7327, 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 13 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-990-7327 |
| Primary Part Number | S281-32 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Supplementary Features | NOT INTERCHANGEABLE W/ MS21919 FOR ACFT F-111C |
| Style Designator | OFFSET MOUNT |
| Material Document and Classification | QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE BAND |
| Material Document and Classification | AMS3651 ASSN STD SINGLE MATERIAL RESPONSE CUSHION |
| Diameter | 0.204 INCHES NOMINAL IN |
| Material Thickness | 0.041 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN |
| Distance From Loop Center to Tongue End | 1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN |
| Specification/standard Data | 81755-C2037 MANUFACTURERS SPECIFICATION CONTROL |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 1.400 INCHES MINIMUM AND 1.431 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE CUSHION |
| Material | ALUMINUM ALLOY 2024 BAND |
| Loop Inside Diameter | 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN |
| 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 |
|---|---|
| S281-32 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| Reference | Meaning |
|---|---|
| TA04C76WD32X | 3/2 Design control — primary reference U.S. Government activity |
| C2037-32 | 7/2 Vendor item drawing reference U.S. Government activity |
| 385-32 | 3/2 Design control — primary reference U.S. Government activity |
| TA4C76WD32X | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-990-7327 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-990-7327 has 1 manufacturer part number on file: S281-32 (Umpco, Inc. Dba Umpco Inc).
Key specifications for S281-32: Supplementary Features: NOT INTERCHANGEABLE W/ MS21919 FOR ACFT F-111C; Style Designator: OFFSET MOUNT; Material Document and Classification: QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE BAND; Material Document and Classification: AMS3651 ASSN STD SINGLE MATERIAL RESPONSE CUSHION. 13 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.