The Clamp,loop, cataloged under National Stock Number 5340-01-520-9171, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 14 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-520-9171 |
| Primary Part Number | SS7231LWDG12 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE BAND |
| Cushioning Environmental Protection | 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 FED SPEC SINGLE MATERIAL RESPONSE BAND |
| Diameter | 0.199 INCHES MINIMUM AND 0.209 INCHES MAXIMUM IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Distance From Loop Center to Tongue End | 1.063 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 4 TYPE AND A CLASS |
| Surface Treatment | CHROMATE BAND |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN |
| Material | RUBBER CHLOROPRENE CLASS CR CUSHION |
| Loop Inside Diameter | 0.735 INCHES MINIMUM AND 0.765 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 |
|---|---|
| SS7230WDC12 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| SS7231LWDG12 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5340-01-520-9171 is a Clamp,loop, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-520-9171 has 2 manufacturer part numbers on file: SS7230WDC12 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), SS7231LWDG12 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for SS7231LWDG12: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE BAND; Cushioning Environmental Protection: WEATHER RESISTANT; Style Designator: OFFSET MOUNT; Material Document and Classification: AMS 3209 ASSN STD SINGLE MATERIAL RESPONSE CUSHION. 14 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.