The Clamp,loop, cataloged under National Stock Number 5340-01-077-8882, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-077-8882 |
| Primary Part Number | S663WDG20 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Cushioning Environmental Protection | HEAT AND OIL RESISTANT AND WEATHER RESISTANT |
| Fastening Device Type | LOCK TAB |
| Style Designator | SINGLE LOOP |
| Material Document and Classification | QQ-A-250/5,ALCLAD T4 FED SPEC SINGLE MATERIAL RESPONSE BAND |
| Material Document and Classification | AMS 3209 ASSN STD SINGLE MATERIAL RESPONSE CUSHION |
| 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 | 1.420 INCHES NOMINAL IN |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 1.125 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 BAND |
| Material | RUBBER CHLOROPRENE CLASS CR CUSHION |
| Loop Inside Diameter | 1.235 INCHES MINIMUM AND 1.265 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 |
|---|---|
| S663WDG20 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| JM44LC28WD20 PRIMARY | J & M Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| ST9M588WDG20 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 815WD20 | 5/2 Secondary reference U.S. Government activity |
| 10132495 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5340-01-077-8882 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-077-8882 has 2 manufacturer part numbers on file: S663WDG20 (Umpco, Inc. Dba Umpco Inc), JM44LC28WD20 (J & M Products, Inc).
Key specifications for S663WDG20: Cushioning Environmental Protection: HEAT AND OIL RESISTANT AND WEATHER RESISTANT; Fastening Device Type: LOCK TAB; Style Designator: SINGLE LOOP; Material Document and Classification: QQ-A-250/5,ALCLAD T4 FED SPEC SINGLE MATERIAL RESPONSE BAND. 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.