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Technical Data Sheet
PartsTable / COMPONENT / 51171R1
51171R1 ✓ 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: 45.0 DEGREES FIRST END, temp_rating: -40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF, thread_class: 2A FIRST END A, exterior_color: BLACK, connection_type: THREADED EXTERNAL TUBE FIRST END, inside_diameter: 0.188 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-128-0407, 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
51171R1
NSN: 4720-00-128-0407
FSC: 4720
CAGE: 89346 — NAVISTAR INTL CORP TRUCK BR OHIO PLANT (USA)
SPECIFICATIONS
seat_angle45.0 DEGREES FIRST END
temp_rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_class2A FIRST END A
exterior_colorBLACK
connection_typeTHREADED EXTERNAL TUBE FIRST END
inside_diameter0.188 INCHES NOMINAL IN
connection_styleSWIVEL NUT, INVERTED FLARE FIRST END
outside_diameter0.375 INCHES NOMINAL IN
special_featuresFURNISHED W/ONE ADAPTER STRAIGHT THD 0.438-24 UNS 2B TO 0.125-27 NPT 2A A
thread_directionRIGHT-HAND SECOND END
operating_pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure2000.0 POUNDS PER SQUARE INCH LBS
NSN4720-00-128-0407
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 51171R1 · 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
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
INSIDE DIAMETER: 0.188 INCHES NOMINAL IN
•
HYDROSTATIC TEST PRESSURE: 1000.0 POUNDS PER SQUARE INCH LBS
•
THREAD SERIES DESIGNATOR: UNS FIRST END
•
MEASURING METHOD AND LENGTH: 10.500 INCHES NOMINAL OVERALL IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE SECOND END
•
CONNECTION STYLE: SWIVEL NUT, INVERTED FLARE FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEROUND
INSIDE DIAMETER0.188 INCHES NOMINAL IN
HYDROSTATIC TEST PRESSURE1000.0 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORUNS FIRST END
MEASURING METHOD AND LENGTH10.500 INCHES NOMINAL OVERALL IN
THREAD SERIES DESIGNATORNPT SECOND END
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
CONNECTION STYLESWIVEL NUT, INVERTED FLARE FIRST END
EXTERIOR COLORBLACK
CONNECTION STYLEPLAIN SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
25SInterchangeable
interchangeable cross-reference
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85217Interchangeable
interchangeable cross-reference
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69-172Interchangeable
interchangeable cross-reference
interchangeable
D7-EA08-08NJ-10NJ-17Interchangeable
interchangeable cross-reference
interchangeable
95901AInterchangeable
interchangeable cross-reference
interchangeable
95907A ITEM 5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51171R1?
51171R1 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 51171R1?
There are 6 known substitutes for 51171R1: 25S, 85217, 69-172 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51171R1?
51171R1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-128-0407. 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