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Technical Data Sheet
B74178 ✓ Verified by PartsTable
· PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include seat_angle: 30.0 DEGREES FIRST END, temp_rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF, exterior_color: BLACK, connection_type: THREADED EXTERNAL PIPE FIRST END, inside_diameter: 0.250 INCHES NOMINAL IN, connection_style: INVERTED FLARE 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 4720-01-168-1692, 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
B74178
NSN: 4720-01-168-1692
FSC: 4720
CAGE: 05825 — O T S I (USA)
SPECIFICATIONS
seat_angle30.0 DEGREES FIRST END
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
exterior_colorBLACK
connection_typeTHREADED EXTERNAL PIPE FIRST END
inside_diameter0.250 INCHES NOMINAL IN
connection_styleINVERTED FLARE FIRST END
outside_diameter0.620 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
operating_pressure315.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure1260.0 POUNDS PER SQUARE INCH LBS
nominal_thread_size0.250 INCHES FIRST END IN
end_connection_designSTRAIGHT FIRST END
NSN4720-01-168-1692
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — PN: B74178 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
THREAD DIRECTION: RIGHT-HAND FIRST END
TEMP RATING: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
MEASURING METHOD AND LENGTH: 180.000 INCHES NOMINAL OVERALL IN
CONNECTION STYLE: INVERTED FLARE FIRST END
INSIDE DIAMETER: 0.250 INCHES NOMINAL IN
OPERATING PRESSURE: 315.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
THREAD SERIES DESIGNATOR: NPT FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
THREAD DIRECTIONRIGHT-HAND FIRST END
TEMP RATING-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
MEASURING METHOD AND LENGTH180.000 INCHES NOMINAL OVERALL IN
CONNECTION STYLEINVERTED FLARE FIRST END
INSIDE DIAMETER0.250 INCHES NOMINAL IN
OPERATING PRESSURE315.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
THREAD SERIES DESIGNATORNPT FIRST END
EXTERIOR COLORBLACK
NOMINAL THREAD SIZE0.250 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
74178Interchangeable
interchangeable cross-reference
interchangeable
74-169Interchangeable
interchangeable cross-reference
interchangeable
74Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B74178?
B74178 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace B74178?
There are 3 known substitutes for B74178: 74178, 74-169, 74. Substitute compatibility should be verified for your specific system.
What is the NSN for B74178?
B74178 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-01-168-1692. This indicates validated use in U.S. government and defense supply chains.
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