The Clamp,loop, cataloged under National Stock Number 5340-01-321-3717, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-321-3717 |
| Primary Part Number | 13084431 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE NUT |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE BAND |
| Cushioning Environmental Protection | CORROSION RESISTANT OR OIL RESISTANT OR WEATHER RESISTANT |
| Fastening Device Type | SELF-LOCKING HEXAGON NUT |
| Style Designator | SINGLE LOOP |
| Material Document and Classification | AMS 3303 ASSN STD SINGLE MATERIAL RESPONSE CUSHION |
| Material Document and Classification | QQ-A-250/4,TEMPER O FED SPEC SINGLE MATERIAL RESPONSE BAND |
| Diameter | 0.156 INCHES NOMINAL IN |
| Material Thickness | 0.040 INCHES NOMINAL IN |
| Distance From Loop Center to Tongue End | 0.853 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE NUT |
| Surface Treatment | CHROMATE BAND |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.665 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2017 NUT |
| Material | RUBBER SILICONE CLASS Q CUSHION |
| Material | ALUMINUM ALLOY 2024 BAND |
| Loop Inside Diameter | 0.625 INCHES NOMINAL 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 |
|---|---|
| 13084431 PRIMARY | Lockheed Martin Corporation (USA) |
| Reference | Meaning |
|---|---|
| 13084431 | 7/9 Vendor item drawing reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
| 11214-1W | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-321-3717 is a Clamp,loop, manufactured by Lockheed Martin Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-321-3717 has 1 manufacturer part number on file: 13084431 (Lockheed Martin Corporation).
Key specifications for 13084431: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE NUT; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE BAND; Cushioning Environmental Protection: CORROSION RESISTANT OR OIL RESISTANT OR WEATHER RESISTANT; Fastening Device Type: SELF-LOCKING HEXAGON NUT. 18 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.