The Block,manifold,air, cataloged under National Stock Number 4730-01-446-2546, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-446-2546 |
| Primary Part Number | 2031880 |
| Item Name | Block,manifold,air |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| General Characteristics Item Description | ITEM IS TEE SHAPED WITH TWO MOUNTING HOLES AND ONE INLET AND ONE OUTLET AND MADE FROM CASTING 2067230. |
| 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 |
|---|---|
| 2031880 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 6HA334 | 5/9 Secondary reference Oshkosh Corp |
| OSH/2031880 | 5/9 Secondary reference Daimler Truck North America Llc |
| 2031880 | 5/9 Secondary reference Oshkosh Corp |
NSN 4730-01-446-2546 is a Block,manifold,air, manufactured by Oshkosh Defense Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-446-2546 has 1 manufacturer part number on file: 2031880 (Oshkosh Defense Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-618-1176. Verify interchangeability with system specifications before substitution.
Key specifications for 2031880: General Characteristics Item Description: ITEM IS TEE SHAPED WITH TWO MOUNTING HOLES AND ONE INLET AND ONE OUTLET AND MADE FROM CASTING 2067230.; Overall Length: 3.630 INCHES NOMINAL IN; Overall Width: 2.130 INCHES NOMINAL IN; End Item Identification: 3805-01-431-1165,TRUCK,LINE HAUL TRACTOR (M915 SERIES).. 1 specification is 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.