The Clamp,loop, cataloged under National Stock Number 5340-01-115-2887, 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 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-115-2887 |
| Primary Part Number | S663WDG17 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SINGLE LOOP |
| Material Document and Classification | QQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 0.204 INCHES NOMINAL IN |
| Material Thickness | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| Distance From Loop Center to Tongue End | 1.297 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE OVERALL |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 1.002 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Loop Inside Diameter | 1.048 INCHES MINIMUM AND 1.078 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 |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| S663WDG17 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| 642AS1641-17 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| ST9M588WDG17 | The Boeing Company Div Defense (USA) |
| JM44LC28WD17 PRIMARY | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 815WD17 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-115-2887 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-115-2887 has 4 manufacturer part numbers on file: S663WDG17 (Umpco, Inc. Dba Umpco Inc), 642AS1641-17 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), ST9M588WDG17 (The Boeing Company Div Defense), JM44LC28WD17 (J & M Products, Inc).
Key specifications for S663WDG17: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SINGLE LOOP; Material Document and Classification: QQ-A-250/5 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Diameter: 0.204 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.