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Technical Data Sheet
PartsTable / COMPONENT / B104B176
B104B176 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

ADAPTER,STRAIGHT,FLANGE TO HOSE. Key specifications include material: COPPER ALLOY OVERALL, flange_shape: ROUND WITH HOLES FIRST END, connection_type: THREADED INTERNAL HOSE SECOND END, connection_style: SWIVEL NUT, GASKET SEAL (HOSE) SECOND END, nominal_thickness: 0.562 INCHES FIRST END IN, bolt_hole_quantity: 10 FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-3381, 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
B104B176
NSN: 4730-00-277-3381
FSC: 4730
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
flange_shapeROUND WITH HOLES FIRST END
connection_typeTHREADED INTERNAL HOSE SECOND END
connection_styleSWIVEL NUT, GASKET SEAL (HOSE) SECOND END
nominal_thickness0.562 INCHES FIRST END IN
bolt_hole_quantity10 FIRST END
flange_face_designPLAIN FIRST END
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size2.500 INCHES SECOND END IN
maximum_operating_temp218.3 CELSIUS SINGLE RESPONSE DEGC
nominal_overall_length1.437 INCHES IN
media_for_which_designedWATER-OIL-GAS SINGLE RESPONSE
NSN4730-00-277-3381
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B104B176 · 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
•
MEDIA FOR WHICH DESIGNED: WATER-OIL-GAS SINGLE RESPONSE
•
NOMINAL THREAD SIZE: 2.500 INCHES SECOND END IN
•
NOMINAL OUTSIDE DIAMETER: 7.687 INCHES FIRST END IN
•
OPERATING PRESSURE: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
FLANGE FACE DESIGN: PLAIN FIRST END
•
MATERIAL: COPPER ALLOY OVERALL
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 2.500 INCHES SECOND END IN
•
NOMINAL OVERALL LENGTH: 1.437 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SINGLE RESPONSE
NOMINAL THREAD SIZE2.500 INCHES SECOND END IN
NOMINAL OUTSIDE DIAMETER7.687 INCHES FIRST END IN
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
FLANGE FACE DESIGNPLAIN FIRST END
MATERIALCOPPER ALLOY OVERALL
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED2.500 INCHES SECOND END IN
NOMINAL OVERALL LENGTH1.437 INCHES IN
BOLT HOLE NOMINAL DIAMETER0.500 INCHES FIRST END IN
THREAD SERIES DESIGNATORNH SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
SC6461Interchangeable
interchangeable cross-reference
interchangeable
N1275Interchangeable
interchangeable cross-reference
interchangeable
C6498Interchangeable
interchangeable cross-reference
interchangeable
B104ANDB176Interchangeable
interchangeable cross-reference
interchangeable
B104B176Interchangeable
interchangeable cross-reference
interchangeable
510Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B104B176?
B104B176 is a ADAPTER,STRAIGHT,FLANGE TO HOSE.
What parts can replace B104B176?
There are 8 known substitutes for B104B176: SC6461, N1275, C6498 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B104B176?
B104B176 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-3381. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026