The Tee,pipe, cataloged under National Stock Number 4730-01-248-7890, 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 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy. Government technical data includes 12 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-248-7890 |
| Primary Part Number | 1381-1/2X3/8X1/2 |
| Item Name | Tee,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.375 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 0.500 INCHES THIRD END IN |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | ASTM-A-403,GR-304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.125 INCHES NOMINAL ALL ENDS IN |
| Specification/standard Data | 80204-B16.11 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 2 TABLE |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE 80 ALL ENDS |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 516-5588542 ITEM 32 | Naval Sea Systems Command (USA) |
| 1381-1/2X3/8X1/2 PRIMARY | Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA) |
| Reference | Meaning |
|---|---|
| 516-5588542 ITE | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 2300-3332 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
| ASTM-A403,GB-30 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2400822 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 516-5588542 | D/9 Drawing number reference only Naval Sea Systems Command |
| B16.11 | 5/1 Secondary reference U.S. Government activity |
NSN 4730-01-248-7890 is a Tee,pipe, manufactured by Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-248-7890 has 2 manufacturer part numbers on file: 516-5588542 ITEM 32 (Naval Sea Systems Command), 1381-1/2X3/8X1/2 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy).
1 possible match (shared part number, not a government interchangeability claim): 5955-01-304-2175. Verify interchangeability with system specifications before substitution.
Key specifications for 1381-1/2X3/8X1/2: Nominal Pipe Size Accommodated: 0.375 INCHES SECOND END IN; Nominal Pipe Size Accommodated: 0.500 INCHES THIRD END IN; Nominal Pipe Size Accommodated: 0.500 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) ALL ENDS. 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.