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FIG5181-150 — HEATING ELEMENT,ELECTRICAL,IMMER

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

FIG5181-150: HEATING ELEMENT,ELECTRICAL,IMMER.

HEATING ELEMENT,ELECTRICAL,IMMER. Key specifications include material: COPPER ALLOY, thickness: 0.688 INCHES NOMINAL IN, neck_height: 0.625 INCHES NOMINAL IN, flange_diameter: 3.812 INCHES NOMINAL IN, socket_diameter: 1.050 INCHES NOMINAL IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-104-1997, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
FIG5181-150
NSN: 4730-00-104-1997
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 72423 — FLAGG STANLEY G & CO INC DBA FLAGG BRASS (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.688 INCHES NOMINAL IN
neck_height0.625 INCHES NOMINAL IN
flange_diameter3.812 INCHES NOMINAL IN
socket_diameter1.050 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.562 INCHES NOMINAL IN
bolt_hole_quantity4
bolt_circle_diameter2.688 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, SOCKET BRAZING NECK
operating_pressure_and_type250.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
face_seating_surface_conditionSERRATED
NSN4730-00-104-1997
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: FIG5181-150 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SOCKET DIAMETER: 1.050 INCHES NOMINAL IN
•
FLANGE DIAMETER: 3.812 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: SERRATED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 0.750 INCHES IN
•
OPERATING PRESSURE AND TYPE: 250.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLANGE SECTION STYLE: PLAIN FACE, SOCKET BRAZING NECK
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SOCKET DIAMETER1.050 INCHES NOMINAL IN
FLANGE DIAMETER3.812 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONSERRATED
NOMINAL PIPE SIZE FOR WHICH DESIGNED0.750 INCHES IN
OPERATING PRESSURE AND TYPE250.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FLANGE SECTION STYLEPLAIN FACE, SOCKET BRAZING NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.562 INCHES NOMINAL IN
NECK HEIGHT0.625 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 3
202176REVDITEM23Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-F-20042Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-PRF-20042Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FIG5181-150?
FIG5181-150 is a HEATING ELEMENT,ELECTRICAL,IMMER.
What parts can replace FIG5181-150?
There are 3 known substitutes for FIG5181-150: 202176REVDITEM23, MIL-F-20042, MIL-PRF-20042. Substitute compatibility should be verified for your specific system.
What is the NSN for FIG5181-150?
FIG5181-150 is cataloged in the U.S. Government catalog under NSN 4730-00-104-1997. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.