The Ladder,safety Step, cataloged under National Stock Number 5440-01-563-8421, is classified within Federal Supply Class 5440 (Scaffolding Equipment and Concrete Forms) of the Prefabricated Structures and Scaffolding group. The manufacturer of record is Grainger Div of W W Grainger Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5440-01-563-8421 |
| Primary Part Number | 4XM38 |
| Item Name | Ladder,safety Step |
| FSC / FSG | 5440 / 54 — Scaffolding Equipment and Concrete Forms |
| Manufacturer | Grainger Div of W W Grainger Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 4XM38 PRIMARY | Grainger Div of W W Grainger Inc (USA) |
| Reference | Meaning |
|---|---|
| 8214841 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5440-01-563-8421 is a Ladder,safety Step, manufactured by Grainger Div of W W Grainger Inc, classified under FSC 5440, Scaffolding Equipment and Concrete Forms. Status: active.
NSN 5440-01-563-8421 has 1 manufacturer part number on file: 4XM38 (Grainger Div of W W Grainger Inc).
Key specifications for 4XM38: End Item Identification: CLOSE IN WEAPON SYSTEM (CIWS) MK15 MOD 29. 0 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.