The Clamp,loop, cataloged under National Stock Number 5340-01-228-0724, 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 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-228-0724 |
| Primary Part Number | S663WDG40 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Cushioning Environmental Protection | FUEL RESISTANT AND WEATHER RESISTANT |
| Style Designator | OFFSET MOUNT |
| Material Document and Classification | AMS 3209 ASSN STD SINGLE MATERIAL RESPONSE CUSHION |
| Material Document and Classification | QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE BAND |
| Diameter | 0.204 INCHES NOMINAL IN |
| Material Thickness | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Distance From Loop Center to Tongue End | 2.047 INCHES MINIMUM AND 2.485 INCHES MAXIMUM IN |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 1.752 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 BAND |
| Material | RUBBER CHLOROPRENE CLASS CR CUSHION |
| Loop Inside Diameter | 1.485 INCHES MINIMUM AND 2.515 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 |
|---|---|
| S663WDG40 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| JM44LC28WD40 PRIMARY | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 815WD40 | 5/9 Secondary reference U.S. Government activity |
| TA0220060WCR40 | 3/2 Design control — primary reference U.S. Government activity |
| ST9M588WDG40 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5340-01-228-0724 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-228-0724 has 2 manufacturer part numbers on file: S663WDG40 (Umpco, Inc. Dba Umpco Inc), JM44LC28WD40 (J & M Products, Inc).
Key specifications for S663WDG40: Cushioning Environmental Protection: FUEL RESISTANT AND WEATHER RESISTANT; Style Designator: OFFSET MOUNT; Material Document and Classification: AMS 3209 ASSN STD SINGLE MATERIAL RESPONSE CUSHION; Material Document and Classification: QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE BAND. 12 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.