The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-481-2255, 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 Sae International Dba Sae International. Government technical data includes 13 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-481-2255 |
| Primary Part Number | AS4203T05 |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Connection Style | SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END |
| Connection Style | GASKET SEAL (BOSS) SECOND END |
| Nominal Overall Length | 1.023 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | AMS4965 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.312 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Thread Class | 3B ALL ENDS |
| Thread Quantity Per Inch | 24 FIRST END |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNJS ALL ENDS |
| 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 |
|---|---|
| AS4203T05 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 4730PL0745009 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS58421 | 5/9 Secondary reference U.S. Government activity |
| AS4203 | 5/9 Secondary reference U.S. Government activity |
| 4730PL1773867 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS4203 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS4203T05 | 5/9 Secondary reference U.S. Government activity |
| AS58421 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS4203T05 | 5/9 Secondary reference Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco |
NSN 4730-01-481-2255 is a Adapter,straight,tube to Boss, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-481-2255 has 1 manufacturer part number on file: AS4203T05 (Sae International Dba Sae International).
Key specifications for AS4203T05: Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END; Connection Style: GASKET SEAL (BOSS) SECOND END; Nominal Overall Length: 1.023 INCHES IN; Connection Type: THREADED EXTERNAL TUBE FIRST END. 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.