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NSN 4730-01-165-8386Government record, cited
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Tailpiece, Union4730-01-165-8386

NSN 4730-01-165-8386 · NIIN 011658386
FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4730-01-165-8386 · 4730011658386 · NIIN 011658386 · 01-165-8386 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 508-4685766 · 508-4585766 ITEM F55 · 87651-1471 ITEM F55 · 2621-791-01-PC 194 · 516-5486653 F5
Nearby stock numbers  ·
L 1.440 INCHES NOMINAL IN HOSE FITTING
4730-01-165-8386 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Tailpiece,union — FSC 4730
  • Nominal Pipe Size Designation: 0.250 INCHES IN
  • Flange Thickness: 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
  • End Connection Type: SWEAT SOLDER
  • Seat Type: GASKET
  • Material: COPPER ALLOY 715
  • Flange Outside Diameter: 1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN
Identification
  • NSN: 4730-01-165-8386
  • NIIN: 011658386
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Tailpiece,union, cataloged under National Stock Number 4730-01-165-8386, 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 6 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
NSN4730-01-165-8386
Item NameTailpiece,union
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
StatusACTIVE
Nominal Pipe Size Designation0.250 INCHES IN
Flange Thickness0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
End Connection TypeSWEAT SOLDER
Seat TypeGASKET
MaterialCOPPER ALLOY 715
Flange Outside Diameter1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-184-102613-08-0532 POSSIBLE MATCH
FLANGE,PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-275-4337262156103-006 POSSIBLE MATCH
RESTRICTOR,FLUID FLOW
Possible match (shared part number)Naval Inventory Control Point Mechanicsburg
4730-01-275-6166 POSSIBLE MATCH
TEE,PIPE
Possible match (shared part number)
4730-01-275-9586508-4677429 ITEM F35 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)Naval Ship Systems Command
4730-01-275-958915-97-4813 POSSIBLE MATCH
TEE,FLANGE TO PIPE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-277-5438 POSSIBLE MATCH
ELBOW,PIPE
Possible match (shared part number)
4730-01-325-4003262102102-078A POSSIBLE MATCH
ELBOW,BOSS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-75122621-791-03 ASSY 106 POSSIBLE MATCH
UNION,TUBE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-325-9136262179105-036AA POSSIBLE MATCH
TAILPIECE,UNION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-327-00872621-021-02 ASSY 78 POSSIBLE MATCH
ELBOW,PIPE TO BOSS
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
508-4685766 D/9 Drawing number reference only
U.S. Government activity
508-4585766 ITEM F55 5/2 Secondary reference
U.S. Government activity
87651-1471 ITEM F55 5/2 Secondary reference
U.S. Government activity
2621-791-01-PC 194 5/2 Secondary reference
U.S. Government activity
516-5486653 F5 C/1 Advisory reference — outside the item-of-supply concept
Naval Sea Systems Command
508-4677429 D/9 Drawing number reference only
U.S. Government activity
17-97-5280 3/2 Design control — primary reference
U.S. Government activity
508-4677429 ITEM F23 5/2 Secondary reference
U.S. Government activity
Related Parts
4730-01-184-1026POSSIBLE MATCH
FLANGE,PIPE
13-08-0532
4730-01-275-4337POSSIBLE MATCH
RESTRICTOR,FLUID FLOW
262156103-006
4730-01-275-6166POSSIBLE MATCH
TEE,PIPE
4730-01-275-9586POSSIBLE MATCH
ELBOW,PIPE
508-4677429 ITEM F35
4730-01-275-9589POSSIBLE MATCH
TEE,FLANGE TO PIPE
15-97-4813
4730-01-277-5438POSSIBLE MATCH
ELBOW,PIPE
4730-01-325-4003POSSIBLE MATCH
ELBOW,BOSS
262102102-078A
4730-01-325-7512POSSIBLE MATCH
UNION,TUBE
2621-791-03 ASSY 106
4730-01-325-9136POSSIBLE MATCH
TAILPIECE,UNION
262179105-036AA
4730-01-327-0087POSSIBLE MATCH
ELBOW,PIPE TO BOSS
2621-021-02 ASSY 78
4730-01-700-0711POSSIBLE MATCH
ELBOW,PIPE

Frequently Asked Questions

What is NSN 4730-01-165-8386?

NSN 4730-01-165-8386 is a Tailpiece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-165-8386?

11 possible matches (shared part number, not a government interchangeability claim): 4730-01-184-1026, 4730-01-275-4337, 4730-01-275-6166. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-165-8386?

Key specifications for 4730-01-165-8386: Nominal Pipe Size Designation: 0.250 INCHES IN; Flange Thickness: 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; End Connection Type: SWEAT SOLDER; Overall Length: 1.440 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-165-8386 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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