The Padlock, cataloged under National Stock Number 5340-01-346-4612, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-346-4612 |
| Primary Part Number | 1LFCN |
| Item Name | Padlock |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Master Lock Company Llc |
| Status | ACTIVE |
| Supplementary Features | STEEL, BRONZE, OR BRASS BODY WITH HARDENED STEEL SHACKLE |
| Operating Mechanism Type | PIN TUMBLER OR DISK TUMBLER |
| Nondefinitive Spec/std Data | PO 1 TYPE AND 2 GRADE |
| Shackle Diameter | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Construction | SOLID OR LAMINATED |
| 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 |
|---|---|
| 1LFCN PRIMARY | Master Lock Company Llc (USA) |
| Reference | Meaning |
|---|---|
| ASTM F883 | 3/1 Design control — primary reference U.S. Government activity |
| 1LFW | 5/9 Secondary reference Master Lock Company Llc |
NSN 5340-01-346-4612 is a Padlock, manufactured by Master Lock Company Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-346-4612 has 1 manufacturer part number on file: 1LFCN (Master Lock Company Llc).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-346-7462, 5340-01-412-7004, 5340-01-463-5841. Verify interchangeability with system specifications before substitution.
Key specifications for 1LFCN: Supplementary Features: STEEL, BRONZE, OR BRASS BODY WITH HARDENED STEEL SHACKLE; Operating Mechanism Type: PIN TUMBLER OR DISK TUMBLER; Nondefinitive Spec/std Data: PO 1 TYPE AND 2 GRADE; Special Features: WITH CHAIN, KEY OPERATED, CORROSION RESISTANT, INSIDE VERTICAL CLEARANCE 1.000 TO 1.625 INCH, HORIZONTAL SIDE CLEARANCE 0.750 TO 0.875 INCH IN. 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.