FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as4730-01-306-0268 ·
4730013060268 ·
NIIN 013060268 ·
01-306-0268 ·
FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 2621-228-01 PIECE 193G · 704-4685281 F3 · 2621-228-01
Nearby stock numbers← 4730-01-306-0260
·
4730-01-306-0440 Nozzle, Distribution, Water →
4730-01-306-0268 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Flange,pipe — FSC 4730
Flange Diameter: 7.500 INCHES NOMINAL IN
Face Seating Surface Condition: GROUND
Nominal Pipe Size for Which Designed: 3.000 INCHES IN
Flange Section Style: FEMALE FACE, WELDING NECK
Style Designator: ROUND, ONE BOLT HOLE CIRCLE
Bolt Hole Diameter: 0.688 INCHES NOMINAL IN
Material Document and Classification: MIL-C-15726,70-30 MIL SPEC SINGLE MATERIAL RESPONSE
Identification
NSN: 4730-01-306-0268
NIIN: 013060268
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 4730-01-306-0268, 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 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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.
MIL-C-15726,70-30 MIL SPEC SINGLE MATERIAL RESPONSE
Groove Depth
0.111 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
Recess Diameter
3.140 INCHES MINIMUM AND 3.160 INCHES MAXIMUM IN
Bolt Hole Quantity
8
Bolt Circle Diameter
5.938 INCHES NOMINAL IN
Raised Face Diameter
4.500 INCHES NOMINAL IN
Raised Face Height
0.015 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
Material
COPPER ALLOY
Groove Width
0.188 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
Thickness
0.940 INCHES MINIMUM AND 0.970 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-325-85322621-228-01 PIECE 216GPOSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-90532621-228-02 PIECE 143POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Derbyshire Machine & Tool Co
4730-01-325-90544685937 ITEM F20POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Naval Ship Systems Command
4730-01-326-08422621-228-01 PIECE 69POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-14492621-228-01 PIECE 174POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-45392621-228-01 PIECE 179POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-326-80752621-228-01 PIECE 60POSSIBLE 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
Reference
Meaning
2621-228-01 PIECE 193G
3/2Design control — primary reference
U.S. Government activity
704-4685281 F3
5/2Secondary reference
U.S. Government activity
2621-228-01
D/9Drawing number reference only
U.S. Government activity
Related Parts
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 4730-01-306-0268?
NSN 4730-01-306-0268 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-01-306-0268?
7 possible matches (shared part number, not a government interchangeability claim): 4730-01-325-8532, 4730-01-325-9053, 4730-01-325-9054. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-01-306-0268?
Key specifications for 4730-01-306-0268: Flange Diameter: 7.500 INCHES NOMINAL IN; Face Seating Surface Condition: GROUND; Nominal Pipe Size for Which Designed: 3.000 INCHES IN; Flange Section Style: FEMALE FACE, WELDING NECK. 16 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-306-0268 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.
What is the DEMIL code for NSN 4730-01-306-0268?
NSN 4730-01-306-0268 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.