The Ladder,safety Step, cataloged under National Stock Number 5440-01-139-4975, is classified within Federal Supply Class 5440 (Scaffolding Equipment and Concrete Forms) of the Prefabricated Structures and Scaffolding group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5440-01-139-4975 |
| Primary Part Number | 8106T25 |
| Item Name | Ladder,safety Step |
| FSC / FSG | 5440 / 54 — Scaffolding Equipment and Concrete Forms |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Step Quantity | 7 |
| Rolling Element Type and Quantity | 4 RETRACTABLE SWIVEL CASTER |
| Step Length | 26.000 INCHES NOMINAL IN |
| Top Step Width | 10.000 INCHES NOMINAL IN |
| Distance From Base to Top Step | 70.000 INCHES NOMINAL IN |
| Extension Around Top Step | INCLUDED |
| Base Overall Length | 53.000 INCHES NOMINAL IN |
| Locking Feature | INCLUDED |
| Opposing Steps | NOT INCLUDED |
| Handrail Height Above Top Step | 30.000 INCHES NOMINAL IN |
| Intermediate Step Width | 7.000 INCHES NOMINAL IN |
| Material | STEEL |
| Handrails | INCLUDED |
| 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 |
|---|---|
| 1007R2630A3E10B4COC1P6 | Independent Hardware Inc (USA) |
| 8106T25 PRIMARY | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 8106W25 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
NSN 5440-01-139-4975 is a Ladder,safety Step, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5440, Scaffolding Equipment and Concrete Forms. Status: active.
NSN 5440-01-139-4975 has 2 manufacturer part numbers on file: 1007R2630A3E10B4COC1P6 (Independent Hardware Inc), 8106T25 (Mcmaster-Carr Supply Co).
Key specifications for 8106T25: Overall Height: 100.000 INCHES NOMINAL IN; Step Quantity: 7; Rolling Element Type and Quantity: 4 RETRACTABLE SWIVEL CASTER; Step Length: 26.000 INCHES NOMINAL IN. 13 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.