4730-01-139-3569 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Thread Piece,union — FSC 4730
Union End Thread Direction: RIGHT-HAND
Seat Angle in Deg: 30.0
End Connection Type: THREADED
Union End Thread Size: 0.750-16
Seat Type: ANGLE
Thread Direction: RIGHT-HAND
Thread Size: 1.750-12
Identification
NSN: 4730-01-139-3569
NIIN: 011393569
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description
The Thread Piece,union, cataloged under National Stock Number 4730-01-139-3569, 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 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER LBS
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-191-40972621-021-03PC14POSSIBLE MATCH
ADAPTER,STRAIGHT,PIPE TO TUBE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-214-69802621-021-03PC9POSSIBLE MATCH
ADAPTER,STRAIGHT,TUBE TO BOSS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-69642621-021-03 PIECE 19POSSIBLE MATCH
ADAPTER,STRAIGHT,TUBE TO BOSS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-714-90242621-021-03-PC-38POSSIBLE MATCH
ADAPTER,STRAIGHT,PIPE TO TUBE
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
2621-021-03 PIECE 20
3/2Design control — primary reference
U.S. Government activity
2621-021-03
D/9Drawing number reference only
U.S. Government activity
Related Parts
4730-01-191-4097POSSIBLE MATCH
ADAPTER,STRAIGHT,PIPE TO TUBE
2621-021-03PC14
4730-01-214-6980POSSIBLE MATCH
ADAPTER,STRAIGHT,TUBE TO BOSS
2621-021-03PC9
4730-01-325-6964POSSIBLE MATCH
ADAPTER,STRAIGHT,TUBE TO BOSS
2621-021-03 PIECE 19
4730-01-714-9024POSSIBLE MATCH
ADAPTER,STRAIGHT,PIPE TO TUBE
2621-021-03-PC-38
Frequently Asked Questions
What is NSN 4730-01-139-3569?
NSN 4730-01-139-3569 is a Thread Piece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-01-139-3569?
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-191-4097, 4730-01-214-6980, 4730-01-325-6964. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-01-139-3569?
Key specifications for 4730-01-139-3569: Union End Thread Direction: RIGHT-HAND; Seat Angle in Deg: 30.0; End Connection Type: THREADED; Union End Thread Size: 0.750-16. 12 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-139-3569 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.