The Elbow,boss, cataloged under National Stock Number 4730-00-618-2949, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-618-2949 |
| Item Name | Elbow,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flow Angle | 90.0 DEGREES |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Material Document and Classification | QQ-S-763,CLASS 304 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.359 INCHES NOMINAL ALL ENDS IN |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Specification/standard Data | 88044-AN939 GOVERNMENT STANDARD AND 81343-AS4875 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3B ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) 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 |
| Reference | Meaning |
|---|---|
| AN939J12 | 5/9 Secondary reference Crown Fitting Co Inc |
| AN939J12 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| AN939J12 | 5/1 Secondary reference Hydro-Fitting Manufacturing Corporation |
| AN939J12 | 5/1 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AS4875 | 5/9 Secondary reference U.S. Government activity |
| 4730PL0961482 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AN939J12 | 5/9 Secondary reference Collins Engineering Corp |
| AN939J12 | 5/9 Secondary reference U.S. Government activity |
| AN939J12 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AS5190J12 | 3/9 Design control — primary reference U.S. Government activity |
| MIL-F-5509 | 5/9 Secondary reference U.S. Government activity |
| AN939J12 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| AS5190 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-618-2949 is a Elbow,boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4730-00-640-0618, 4730-00-640-0620. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-618-2949: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: QQ-P-35,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: GASKET SEAL (BOSS) ALL ENDS; Connection Type: THREADED INTERNAL BOSS ALL ENDS. 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.
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.