The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-278-4596, 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 Meritor Industrial Products, Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-278-4596 |
| Primary Part Number | A1898X596 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Meritor Industrial Products, Llc |
| Status | CANCELLED |
| Furnished Items and Quantity | 1 INVERTED NUT |
| Connection Style | PLAIN (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 1.625 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Thread Class | 2B FIRST END |
| Thread Quantity Per Inch | 20 FIRST END |
| Material | COPPER ALLOY 377 OR COPPER ALLOY 360 OVERALL |
| Thread Series Designator | UN FIRST END |
| Thread Series Designator | NPTF SECOND END |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A1898X596 PRIMARY | Meritor Industrial Products, Llc (USA) |
| A1898X596 | Meritor Heavy Vehicle Systems, Llc (USA) |
| 8328015 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 3B8996 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 0912403-3 | 5/9 Secondary reference U.S. Government activity |
| 68HD-6-4 | 3/2 Design control — primary reference U.S. Government activity |
| 4730002784596 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 4730002784596 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 29464B | 5/9 Secondary reference Imperial |
| 88-LB-06X04 | 5/9 Secondary reference Imperial |
| 1904P11 | 5/9 Secondary reference Taylor Machine Works Inc |
| 899T5 | 5/9 Secondary reference Diamond Reo Truck Co |
| 0912403 | 5/9 Secondary reference U.S. Government activity |
| 912403 | 5/9 Secondary reference U.S. Government activity |
| 9230029 | 5/9 Secondary reference Euclid Inc |
| 9230029 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-278-4596 is a Adapter,straight,pipe to Tube, manufactured by Meritor Industrial Products, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: cancelled.
NSN 4730-00-278-4596 has 4 manufacturer part numbers on file: A1898X596 (Meritor Industrial Products, Llc), A1898X596 (Meritor Heavy Vehicle Systems, Llc), 8328015 (U S Army Tank Automotive Command Amsta-Im-Mm), 3B8996 (Caterpillar Inc Div Caterpillar Defense).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-564-2455. Verify interchangeability with system specifications before substitution.
Key specifications for A1898X596: Furnished Items and Quantity: 1 INVERTED NUT; Connection Style: PLAIN (TUBE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 1.625 INCHES IN. 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.
NSN 4730-00-278-4596 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.