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NSN 4730-01-174-0642Government record, cited
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Elbow, Flange to Pipe4730-01-174-0642

NSN 4730-01-174-0642 · NIIN 011740642
FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4730-01-174-0642 · 4730011740642 · NIIN 011740642 · 01-174-0642 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 506-4676568 ITEM F9 · 506-4676568 · 2621-166-01 PIECE 73 · 2621-166-01 · 87656-2311 ITEM F9
Nearby stock numbers  ·
L 3.875 INCHES NOMINAL SECOND END IN ⌀4.438 INCHES SECOND END IN HOSE FITTING
4730-01-174-0642 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Elbow,flange to Pipe — FSC 4730
  • Flange Shape: ROUND WITH HOLES SECOND END
  • Flow Angle: 90.0 DEGREES
  • Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN
  • Flange Face Design: RAISED STRAIGHT SECOND END
  • Connection Style: SOCKET BRAZING RING (PIPE) FIRST END
  • Bolt Circle Nominal Diameter: 4.438 INCHES SECOND END IN
  • Connection Type: UNTHREADED INTERNAL PIPE FIRST END
Identification
  • NSN: 4730-01-174-0642
  • NIIN: 011740642
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Elbow,flange to Pipe, cataloged under National Stock Number 4730-01-174-0642, 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 19 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-174-0642
Item NameElbow,flange to Pipe
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
StatusACTIVE
Flange ShapeROUND WITH HOLES SECOND END
Flow Angle90.0 DEGREES
Nominal Pipe Size Accommodated2.000 INCHES FIRST END IN
Flange Face DesignRAISED STRAIGHT SECOND END
Connection StyleSOCKET BRAZING RING (PIPE) FIRST END
Bolt Circle Nominal Diameter4.438 INCHES SECOND END IN
Connection TypeUNTHREADED INTERNAL PIPE FIRST END
Connection TypeFLANGE SECOND END
Material Document and ClassificationQQ-C-390 ALLOY D5,TP 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Bolt Hole Nominal Diameter0.688 INCHES SECOND END IN
Operating Pressure700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Leg Length3.875 INCHES NOMINAL SECOND END IN
Leg Length3.156 INCHES NOMINAL FIRST END IN
Nominal Outside Diameter5.916 INCHES SECOND END IN
Bolt Hole Quantity6 SECOND END
MaterialCOPPER ALLOY OVERALL
Raised Face Nominal Diameter3.406 INCHES SECOND END IN
Raised Face Nominal Height0.015 INCHES SECOND END IN
Nominal Thickness0.938 INCHES SECOND END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-249-05382621-166-01 PIECE 130 POSSIBLE MATCH
ELBOW,HOSE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-305-57842621-166-01 PIECE 211 MOD POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-305-57852621-166-01- PIECE 6 MOD POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Triumph Manufacturing Company, Inc.
4730-01-315-56092621-166-01 PIECE 190 POSSIBLE MATCH
ELBOW,FLANGE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-315-56112621-166-01 PIECE 154 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Triumph Manufacturing Company, Inc.
4730-01-318-28442621-166-01 PIECE 153 MOD POSSIBLE MATCH
ELBOW,FLANGE
Possible match (shared part number)Derbyshire Machine & Tool Co
4730-01-318-28452621-166-01 PIECE 120 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-69662621-166-01 PIECE 7 POSSIBLE MATCH
ELBOW,FLANGE TO TUBE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-343-0477 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
506-4676568 ITEM F9 3/2 Design control — primary reference
U.S. Government activity
506-4676568 D/9 Drawing number reference only
U.S. Government activity
2621-166-01 PIECE 73 3/2 Design control — primary reference
U.S. Government activity
2621-166-01 D/9 Drawing number reference only
U.S. Government activity
87656-2311 ITEM F9 3/2 Design control — primary reference
U.S. Government activity
Related Parts
4730-01-249-0538POSSIBLE MATCH
ELBOW,HOSE
2621-166-01 PIECE 130
4730-01-305-5784POSSIBLE MATCH
ELBOW,PIPE
2621-166-01 PIECE 211 MOD
4730-01-305-5785POSSIBLE MATCH
ELBOW,PIPE
2621-166-01- PIECE 6 MOD
4730-01-315-5609POSSIBLE MATCH
ELBOW,FLANGE
2621-166-01 PIECE 190
4730-01-315-5611POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-01 PIECE 154
4730-01-318-2844POSSIBLE MATCH
ELBOW,FLANGE
2621-166-01 PIECE 153 MOD
4730-01-318-2845POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-01 PIECE 120
4730-01-325-6966POSSIBLE MATCH
ELBOW,FLANGE TO TUBE
2621-166-01 PIECE 7
4730-01-343-0477POSSIBLE MATCH
ELBOW,FLANGE TO PIPE

Frequently Asked Questions

What is NSN 4730-01-174-0642?

NSN 4730-01-174-0642 is a Elbow,flange to Pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-174-0642?

9 possible matches (shared part number, not a government interchangeability claim): 4730-01-249-0538, 4730-01-305-5784, 4730-01-305-5785. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-174-0642?

Key specifications for 4730-01-174-0642: Flange Shape: ROUND WITH HOLES SECOND END; Flow Angle: 90.0 DEGREES; Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN; Flange Face Design: RAISED STRAIGHT SECOND END. 19 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-174-0642 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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