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NSN 4730-01-155-3565Government record, cited
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Flange, Pipe4730-01-155-3565

NSN 4730-01-155-3565 · NIIN 011553565
FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4730-01-155-3565 · 4730011553565 · NIIN 011553565 · 01-155-3565 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 2621-228-01 · 2621-228-01PC55
Nearby stock numbers  ·
⌀1.903 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN HOSE FITTING
4730-01-155-3565 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Flange,pipe — FSC 4730
  • Socket Diameter: 1.903 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN
  • Flange Diameter: 5.062 INCHES NOMINAL IN
  • Face Seating Surface Condition: GROUND
  • Nominal Pipe Size for Which Designed: 1.500 INCHES IN
  • Socket Depth: 0.625 INCHES NOMINAL IN
  • Flange Section Style: RAISED FACE, SOCKET NECK
  • Style Designator: ROUND, ONE BOLT HOLE CIRCLE
Identification
  • NSN: 4730-01-155-3565
  • NIIN: 011553565
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Flange,pipe, cataloged under National Stock Number 4730-01-155-3565, 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 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government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
NSN4730-01-155-3565
Item NameFlange,pipe
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
StatusACTIVE
Socket Diameter1.903 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN
Flange Diameter5.062 INCHES NOMINAL IN
Face Seating Surface ConditionGROUND
Nominal Pipe Size for Which Designed1.500 INCHES IN
Socket Depth0.625 INCHES NOMINAL IN
Flange Section StyleRAISED FACE, SOCKET NECK
Style DesignatorROUND, ONE BOLT HOLE CIRCLE
Bolt Hole Diameter0.562 INCHES NOMINAL IN
Neck Height0.938 INCHES NOMINAL IN
Material Document and ClassificationMIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE
Groove Depth0.108 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
Bolt Hole Quantity6
Bolt Circle Diameter3.938 INCHES NOMINAL IN
Raised Face Diameter3.094 INCHES NOMINAL IN
Raised Face Height0.015 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
MaterialCOPPER ALLOY
Groove Width0.188 INCHES NOMINAL IN
Thickness0.781 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-156-48452621-228-01ASSY205 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-199-18874687676-0051 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-306-02682621-228-01 PIECE 193G POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-85322621-228-01 PIECE 216G POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-90532621-228-02 PIECE 143 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Derbyshire Machine & Tool Co
4730-01-325-90544685937 ITEM F20 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Ship Systems Command
4730-01-326-08422621-228-01 PIECE 69 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-14492621-228-01 PIECE 174 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-45392621-228-01 PIECE 179 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-80752621-228-01 PIECE 60 POSSIBLE MATCH
ADAPTER,STRAIGHT,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
2621-228-01 D/9 Drawing number reference only
U.S. Government activity
2621-228-01PC55 3/2 Design control — primary reference
U.S. Government activity
Related Parts
4730-01-156-4845POSSIBLE MATCH
FLANGE,PIPE
2621-228-01ASSY205
4730-01-199-1887POSSIBLE MATCH
FLANGE,PIPE
4687676-0051
4730-01-306-0268POSSIBLE MATCH
FLANGE,PIPE
2621-228-01 PIECE 193G
4730-01-325-8532POSSIBLE MATCH
FLANGE,PIPE
2621-228-01 PIECE 216G
4730-01-325-9053POSSIBLE MATCH
FLANGE,PIPE
2621-228-02 PIECE 143
4730-01-325-9054POSSIBLE MATCH
FLANGE,PIPE
4685937 ITEM F20
4730-01-326-0842POSSIBLE MATCH
FLANGE,PIPE
2621-228-01 PIECE 69
4730-01-326-1449POSSIBLE MATCH
FLANGE,PIPE
2621-228-01 PIECE 174
4730-01-326-4539POSSIBLE MATCH
FLANGE,PIPE
2621-228-01 PIECE 179
4730-01-326-8075POSSIBLE MATCH
ADAPTER,STRAIGHT,FLANGE TO PIPE
2621-228-01 PIECE 60

Frequently Asked Questions

What is NSN 4730-01-155-3565?

NSN 4730-01-155-3565 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-155-3565?

10 possible matches (shared part number, not a government interchangeability claim): 4730-01-156-4845, 4730-01-199-1887, 4730-01-306-0268. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-155-3565?

Key specifications for 4730-01-155-3565: Socket Diameter: 1.903 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN; Flange Diameter: 5.062 INCHES NOMINAL IN; Face Seating Surface Condition: GROUND; Nominal Pipe Size for Which Designed: 1.500 INCHES IN. 18 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-155-3565 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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