The Support,retractable,semitrailer, cataloged under National Stock Number 2590-01-375-5852, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is Aerobase Group Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 2590-01-375-5852 |
| Primary Part Number | 8H139D-20 |
| Item Name | Support,retractable,semitrailer |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | Aerobase Group Inc |
| Status | ACTIVE |
| Shoe | INCLUDED |
| Operational Direction | VERTICAL |
| Retracting Method | PIN-HOLE |
| Length | 2.5000 INCHES NOMINAL IN |
| Diameter | 12.000 INCHES NOMINAL IN |
| Operating Speed Quantity | 1 |
| Maximum Underclearance | 63.030 INCHES IN |
| Extended Height | 39.530 INCHES NOMINAL IN |
| Leg Construction | TUBULAR |
| Retracting Mechanism | INCLUDED |
| Operating Control Type | AUTOMATIC |
| Frame Width for Which Designed | 9.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 8H139D-20 PRIMARY | Aerobase Group Inc (USA) |
| Reference | Meaning |
|---|---|
| 8H139D-20 | 3/9 Design control — primary reference Gse Production and Support Llc Dba Gse Spares |
| 8H139D-20 | 5/9 Secondary reference U.S. Government activity |
| 90-13-05 | 5/9 Secondary reference Milwaukee Cylinder Power Gear Div |
| 300571 | 5/9 Secondary reference Milwaukee Cylinder Power Gear Div |
NSN 2590-01-375-5852 is a Support,retractable,semitrailer, manufactured by Aerobase Group Inc, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-01-375-5852 has 1 manufacturer part number on file: 8H139D-20 (Aerobase Group Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-555-9176, 5305-01-594-8534. Verify interchangeability with system specifications before substitution.
Key specifications for 8H139D-20: Shoe: INCLUDED; Operational Direction: VERTICAL; Retracting Method: PIN-HOLE; Length: 2.5000 INCHES NOMINAL IN. 12 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.