The Step Assembly,vehicular, cataloged under National Stock Number 2590-01-656-1220, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is Isometrics Inc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2590-01-656-1220 |
| Primary Part Number | 1051A-28 |
| Item Name | Step Assembly,vehicular |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | Isometrics Inc |
| Status | ACTIVE |
| Component Quantity | 21 |
| Mounting Hole Quantity | 2 |
| Document Type | ENGINEERING DRAWING |
| Surface Treatment Document and Classification | MIL DTL 53072 MIL STD 1ST TREATMENT RESPONSE |
| Mounting Method | HOOK |
| Material Document and Classification | ASTM A36 ASSN STD 1ST MATERIAL RESPONSE |
| Shape | IRREGULAR |
| Component Document Origin | INDUSTRIAL |
| Vehicle Identification Designator | PLS |
| Document Source | 55242 |
| Vehicle Design Control Activity | 55242 |
| Surface Treatment | CARC (CHEMICAL AGENT RESISTANT COATING) |
| Material | ALUMINUM ALLOY AND STEEL |
| Furnished Items and Quantity | 1 LADDER POINTS LABEL;1 LADDER PLATFORM LABEL;2 3/8-16X4.5 LGT THREADED STUD,18-8 SS;8 3/8-16 FLANGED LOCK NUT,18-8 SS;1 PLATFORM FRAME SIDE,LH;2 PLATFORM HOOK;2 LADDER PIN TUBE;1 PLATFORM GRATING;2 PLATFORM FRAME ENDS;1 PLATFORM FRAME SIDE,RH |
| 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 |
|---|---|
| 1051A-28 PRIMARY | Isometrics Inc (USA) |
NSN 2590-01-656-1220 is a Step Assembly,vehicular, manufactured by Isometrics Inc, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-01-656-1220 has 1 manufacturer part number on file: 1051A-28 (Isometrics Inc).
Key specifications for 1051A-28: Component Quantity: 21; Mounting Hole Quantity: 2; Overall Height: 5.20 INCHES NOMINAL IN; Document Type: ENGINEERING DRAWING. 14 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.