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NSN 4730-01-199-1887Government record, cited
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Flange, Pipe4730-01-199-1887

NSN 4730-01-199-1887 · NIIN 011991887
FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4730-01-199-1887 · 4730011991887 · NIIN 011991887 · 01-199-1887 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 1621-228-01 PC 204 · 845-4687676 · 4687676-0051 · 2621-228-01 · 4687676-0085
Nearby stock numbers  ·
⌀1.910 INCHES MINIMUM AND 1.915 INCHES MAXIMUM IN HOSE FITTING
4730-01-199-1887 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Flange,pipe — FSC 4730
  • Socket Diameter: 1.910 INCHES MINIMUM AND 1.915 INCHES MAXIMUM IN
  • Face Seating Surface Condition: MACHINED
  • Nominal Pipe Size for Which Designed: 1.500 INCHES IN
  • Socket Depth: 0.620 INCHES NOMINAL IN
  • Flange Section Style: RAISED FACE, SOCKET NECK
  • Style Designator: SQUARE, ONE BOLT HOLE CIRCLE
  • Bolt Hole Diameter: 0.531 INCHES NOMINAL IN
Identification
  • NSN: 4730-01-199-1887
  • NIIN: 011991887
  • 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 4730-01-199-1887, 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16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
NSN4730-01-199-1887
Item NameFlange,pipe
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
StatusACTIVE
Socket Diameter1.910 INCHES MINIMUM AND 1.915 INCHES MAXIMUM IN
Face Seating Surface ConditionMACHINED
Nominal Pipe Size for Which Designed1.500 INCHES IN
Socket Depth0.620 INCHES NOMINAL IN
Flange Section StyleRAISED FACE, SOCKET NECK
Style DesignatorSQUARE, ONE BOLT HOLE CIRCLE
Bolt Hole Diameter0.531 INCHES NOMINAL IN
Neck Height1.000 INCHES NOMINAL IN
Material Document and ClassificationQQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE
Bolt Hole Quantity4
Bolt Circle Diameter3.535 INCHES NOMINAL IN
Raised Face Diameter2.122 INCHES MINIMUM AND 2.124 INCHES MAXIMUM IN
Raised Face Height0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
Flange Width3.500 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING
Thickness1.280 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 8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
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
1621-228-01 PC 204 5/2 Secondary reference
U.S. Government activity
845-4687676 D/9 Drawing number reference only
Naval Sea Systems Command
4687676-0051 3/2 Design control — primary reference
U.S. Government activity
2621-228-01 D/9 Drawing number reference only
U.S. Government activity
4687676-0085 5/2 Secondary reference
U.S. Government activity
Related Parts
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 4730-01-199-1887?

NSN 4730-01-199-1887 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-199-1887?

8 possible matches (shared part number, not a government interchangeability claim): 4730-01-306-0268, 4730-01-325-8532, 4730-01-325-9053. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-199-1887?

Key specifications for 4730-01-199-1887: Socket Diameter: 1.910 INCHES MINIMUM AND 1.915 INCHES MAXIMUM IN; Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 1.500 INCHES IN; Socket Depth: 0.620 INCHES NOMINAL IN. 16 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-199-1887 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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