PartsTable TECHNICAL DATA SHEET
NSN 4730-01-318-2846Government record, cited

Elbow, Flange to Pipe4730-01-318-2846

NSN 4730-01-318-2846 · NIIN 013182846 · Part number 2621-166-02 PC 29
Derbyshire Machine & Tool Co · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 71905
Government record, cited
NSN 4730-01-318-2846 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-318-2846. Manufacturer of record part number: 2621-166-02 PC 29.
Also searched as  4730-01-318-2846 · 4730013182846 · NIIN 013182846 · 01-318-2846 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 71905 · 2621-166-02 PC 29 · 4684449-T/F32 · 4684449 · 2621-166-02
Nearby stock numbers  ·
Features
  • Elbow,flange to Pipe — FSC 4730
  • Flange Shape: ROUND WITH HOLES SECOND END
  • Flow Angle: 45.0 DEGREES
  • Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN
  • Flange Face Design: PLAIN WITH GASKET GROOVE SECOND END
  • Connection Style: PLAIN BEVELED (PIPE) FIRST END
  • Bolt Circle Nominal Diameter: 3.1250 INCHES SECOND END IN
  • Connection Type: FLANGE SECOND END
Identification
  • NSN: 4730-01-318-2846
  • NIIN: 013182846
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
  • Primary part number: 2621-166-02 PC 29
  • Manufacturer: Derbyshire Machine & Tool Co
General Description

The Elbow,flange to Pipe, cataloged under National Stock Number 4730-01-318-2846, 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 Derbyshire Machine & Tool Co. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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.

Technical Specifications
ParameterValue
NSN4730-01-318-2846
Primary Part Number2621-166-02 PC 29
Item NameElbow,flange to Pipe
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
ManufacturerDerbyshire Machine & Tool Co
StatusACTIVE
Flange ShapeROUND WITH HOLES SECOND END
Flow Angle45.0 DEGREES
Nominal Pipe Size Accommodated1.000 INCHES FIRST END IN
Flange Face DesignPLAIN WITH GASKET GROOVE SECOND END
Connection StylePLAIN BEVELED (PIPE) FIRST END
Bolt Circle Nominal Diameter3.1250 INCHES SECOND END IN
Connection TypeFLANGE SECOND END
Connection TypeUNTHREADED EXTERNAL PIPE FIRST END
Bolt Hole Nominal Diameter0.5625 INCHES SECOND END IN
Operating Pressure700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Leg Length3.470 INCHES MINIMUM AND 3.590 INCHES MAXIMUM ALL ENDS IN
Bolt Hole Quantity4 ALL ENDS
MaterialCOPPER ALLOY AND NICKEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-325-40062621-166-02 PIECE 97 POSSIBLE MATCH
ELBOW,FLANGE
Possible match (shared part number)Derbyshire Machine & Tool Co
4730-01-325-40092621-166-02 PIECE 31 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-40102621-166-02 PIECE R31 POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-90202621-166-02 PIECE 202MOD POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-329-21372621-166-02 PC-140 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-329-21382621-166-02 PC-142 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-329-21632621-166-02 ASSY-182 POSSIBLE MATCH
ELBOW,PIPE TO BOSS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
2621-166-02 PC 29 PRIMARY Derbyshire Machine & Tool Co (USA)
Reference documents
ReferenceMeaning
4684449-T/F32 5/2 Secondary reference
U.S. Government activity
2621-166-02 PC 29 3/2 Design control — primary reference
U.S. Government activity
4684449 D/9 Drawing number reference only
U.S. Government activity
2621-166-02 D/9 Drawing number reference only
U.S. Government activity
Related Parts
4730-01-325-4006POSSIBLE MATCH
ELBOW,FLANGE
2621-166-02 PIECE 97
4730-01-325-4009POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-02 PIECE 31
4730-01-325-4010POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-02 PIECE R31
4730-01-325-9020POSSIBLE MATCH
ELBOW,FLANGE TO PIPE
2621-166-02 PIECE 202MOD
4730-01-329-2137POSSIBLE MATCH
ELBOW,PIPE
2621-166-02 PC-140
4730-01-329-2138POSSIBLE MATCH
ELBOW,PIPE
2621-166-02 PC-142
4730-01-329-2163POSSIBLE MATCH
ELBOW,PIPE TO BOSS
2621-166-02 ASSY-182

Frequently Asked Questions

What is NSN 4730-01-318-2846?

NSN 4730-01-318-2846 is a Elbow,flange to Pipe, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What part numbers are listed for NSN 4730-01-318-2846?

NSN 4730-01-318-2846 has 1 manufacturer part number on file: 2621-166-02 PC 29 (Derbyshire Machine & Tool Co).

What NSN replaces 4730-01-318-2846?

7 possible matches (shared part number, not a government interchangeability claim): 4730-01-325-4006, 4730-01-325-4009, 4730-01-325-4010. Verify interchangeability with system specifications before substitution.

What are the specifications of 2621-166-02 PC 29?

Key specifications for 2621-166-02 PC 29: Flange Shape: ROUND WITH HOLES SECOND END; Flow Angle: 45.0 DEGREES; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Flange Face Design: PLAIN WITH GASKET GROOVE SECOND END. 13 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-318-2846 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.
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