4730-01-371-5757 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Elbow,tube — FSC 4730
Flow Angle: 45.0 DEGREES
Connection Style: SWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END
Connection Style: FLARELESS (TUBE) SECOND END
Connection Type: THREADED EXTERNAL TUBE SECOND END
Connection Type: THREADED INTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated: 1.000 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN
Identification
NSN: 4730-01-371-5757
NIIN: 013715757
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description
The Elbow,tube, cataloged under National Stock Number 4730-01-371-5757, 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 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
SWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END
Connection Style
FLARELESS (TUBE) SECOND END
Connection Type
THREADED EXTERNAL TUBE SECOND END
Connection Type
THREADED INTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated
1.000 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated
0.750 INCHES FIRST END IN
Leg Length
1.066 INCHES NOMINAL FIRST END IN
Leg Length
1.203 INCHES NOMINAL SECOND END IN
Nominal Thread Size
1.062 INCHES FIRST END IN
Nominal Thread Size
1.312 INCHES SECOND END IN
Seat Angle
12.0 DEGREES ALL ENDS
Thread Class
3A SECOND END A
Thread Class
3B FIRST END
Thread Quantity Per Inch
12 ALL ENDS
Material
STEEL CORROSION RESISTING OVERALL
Thread Series Designator
UNIFIED NATIONAL JOINT (UNJ) ALL ENDS
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
N
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-371-575817G450074-55POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-575917G450074-27POSSIBLE MATCH
COUPLING,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-576217G450074-29POSSIBLE MATCH
REDUCER,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727017G450074-57POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727117G450074-59POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727217G450074-61POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727317G450074-49POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
17G450074-53
3/2Design control — primary reference
U.S. Government activity
17G450074
D/9Drawing number reference only
U.S. Government activity
Related Parts
4730-01-371-5758POSSIBLE MATCH
ELBOW,TUBE
17G450074-55
4730-01-371-5759POSSIBLE MATCH
COUPLING,TUBE
17G450074-27
4730-01-371-5762POSSIBLE MATCH
REDUCER,TUBE
17G450074-29
4730-01-371-7270POSSIBLE MATCH
ELBOW,TUBE
17G450074-57
4730-01-371-7271POSSIBLE MATCH
ELBOW,TUBE
17G450074-59
4730-01-371-7272POSSIBLE MATCH
ELBOW,TUBE
17G450074-61
4730-01-371-7273POSSIBLE MATCH
ELBOW,TUBE
17G450074-49
Frequently Asked Questions
What is NSN 4730-01-371-5757?
NSN 4730-01-371-5757 is a Elbow,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-01-371-5757?
7 possible matches (shared part number, not a government interchangeability claim): 4730-01-371-5758, 4730-01-371-5759, 4730-01-371-5762. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-01-371-5757?
Key specifications for 4730-01-371-5757: Flow Angle: 45.0 DEGREES; Connection Style: SWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END; Connection Style: FLARELESS (TUBE) SECOND END; Connection Type: THREADED EXTERNAL TUBE SECOND END. 17 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-371-5757 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.