The Clamp,loop, cataloged under National Stock Number 5340-01-331-3811, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Walker Mfg Co. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-331-3811 |
| Primary Part Number | 33286 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Walker Mfg Co |
| Status | ACTIVE |
| Style Designator | SINGLE LOOP |
| Surface Treatment | ALUMINUM OVERALL |
| Material | STEEL OVERALL |
| Loop Inside Diameter | 4.140 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 |
|---|---|
| 33286 PRIMARY | Walker Mfg Co (USA) |
| Reference | Meaning |
|---|---|
| 268-2440 | 5/9 Secondary reference Stemco Inc Sub of Coltec Industries Inc |
| 1771AS313-1 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 5340-01-331-3811 is a Clamp,loop, manufactured by Walker Mfg Co, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-331-3811 has 1 manufacturer part number on file: 33286 (Walker Mfg Co).
Key specifications for 33286: Style Designator: SINGLE LOOP; Overall Width: 3.000 INCHES NOMINAL IN; Surface Treatment: ALUMINUM OVERALL; End Item Identification: W/S:AIRCRAFT, TMCAT F-14; HELICOPTER, USCG SEARCH AND RESCUE, HH-60J; HELICOPTER, MH-53E; HELICOPTER, CARRIER BASED ASW, SH-60F; HELICOPTER, SEARCH AND RESCUE, HH-60H; AIRCRAFT, C-2A (REPROCURED); AIRCRAFT, VIKING S-3B; AIRCRAFT, HAWKEYE E-2C; HELICOPTER, ADVANCE ATTACK, AH-1W A. 4 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.