The Padlock, cataloged under National Stock Number 5340-01-657-4819, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Master Lock Company Llc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-01-657-4819 |
| Primary Part Number | 3YLW |
| Item Name | Padlock |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Master Lock Company Llc |
| Status | ACTIVE |
| Shackle Clearance | 0.750 INCHES NOMINAL IN |
| Operating Mechanism Type | PIN TUMBLER |
| Material | STEEL OVERALL |
| Shackle Diameter | 0.281 INCHES NOMINAL IN |
| Construction | LAMINATED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3YLW | Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (GBR) |
| PLO-3 YELLOW | Total Lockout (safety) Ltd (GBR) |
| 3YLW PRIMARY | Master Lock Company Llc (USA) |
NSN 5340-01-657-4819 is a Padlock, manufactured by Master Lock Company Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-657-4819 has 3 manufacturer part numbers on file: 3YLW (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)), PLO-3 YELLOW (Total Lockout (safety) Ltd), 3YLW (Master Lock Company Llc).
Key specifications for 3YLW: Shackle Clearance: 0.750 INCHES NOMINAL IN; Operating Mechanism Type: PIN TUMBLER; Overall Width: 1.563 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: LOCK,PADDLE. 5 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.