The Bit,screwdriver, cataloged under National Stock Number 5120-01-035-3344, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Air Tuf Products Div of Air Industries Corp. Government technical data includes 4 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5120-01-035-3344 |
| Primary Part Number | AT405-D4-2 |
| Item Name | Bit,screwdriver |
| FSC / FSG | 5120 / 51 — Hand Tools, Nonedged, Nonpowered |
| Manufacturer | Air Tuf Products Div of Air Industries Corp |
| Status | ACTIVE |
| Tip Size Designation | 2 |
| Drive Shank Type | HEXAGON |
| Shank Width Across Wrench Flats | 0.250 INCHES NOMINAL IN |
| Tip Type | TRI-WING CROSS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AT405-D4-2 PRIMARY | Air Tuf Products Div of Air Industries Corp (USA) |
| 35411 PRIMARY | Magna Div Vermont American Corp (USA) |
| Reference | Meaning |
|---|---|
| BTW2A | 3/1 Design control — primary reference Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc |
| 92536 | 5/9 Secondary reference Irwin Industrial Tool Company Dba Irwin Construction Accessories |
| W2A1 | 5/9 Secondary reference Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc |
| 92536 | 5/9 Secondary reference Irwin Industrial Tool Company |
| BTW2 | 5/9 Secondary reference Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc |
| TWD-2 | 3/1 Design control — primary reference Apex Tool Group, Llc |
NSN 5120-01-035-3344 is a Bit,screwdriver, manufactured by Air Tuf Products Div of Air Industries Corp, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.
NSN 5120-01-035-3344 has 2 manufacturer part numbers on file: AT405-D4-2 (Air Tuf Products Div of Air Industries Corp), 35411 (Magna Div Vermont American Corp).
6 possible matches (shared part number, not a government interchangeability claim): 5331-01-039-9510, 5330-01-348-5781, 5120-01-428-7956. Verify interchangeability with system specifications before substitution.
Key specifications for AT405-D4-2: Tip Size Designation: 2; Drive Shank Type: HEXAGON; Overall Length: 1.000 INCHES NOMINAL IN; Shank Width Across Wrench Flats: 0.250 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.