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Technical Data Sheet
PartsTable / COMPONENT / 25531N
25531N ✓ 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 connection_type: THREADED EXTERNAL PIPE SECOND END, inside_diameter: 0.375 INCHES NOMINAL IN, connection_style: PLAIN SECOND END, outside_diameter: 0.675 INCHES NOMINAL IN, thread_direction: RIGHT-HAND FIRST END, operating_pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-251-6977, 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
25531N
NSN: 4720-00-251-6977
FSC: 4720
CAGE: 62420 — GRINNELL CORP GRINNELL FIRE PROTECTION SYSTMES DIV (USA)
SPECIFICATIONS
connection_typeTHREADED EXTERNAL PIPE SECOND END
inside_diameter0.375 INCHES NOMINAL IN
connection_stylePLAIN SECOND END
outside_diameter0.675 INCHES NOMINAL IN
thread_directionRIGHT-HAND FIRST END
operating_pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
burst_test_pressure1600.0 POUNDS PER SQUARE INCH LBS
nominal_thread_size0.375 INCHES SECOND END IN
end_connection_designSTRAIGHT FIRST END
inside_surface_conditionSMOOTH
media_for_which_designedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
thread_series_designatorNPTF SECOND END
NSN4720-00-251-6977
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 25531N · 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
•
OUTER COVERING ENVIRONMENTAL PROTECTION: WEATHERPROOF
•
NOMINAL THREAD SIZE: 0.375 INCHES SECOND END IN
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
•
MEASURING METHOD AND LENGTH: 10.000 INCHES NOMINAL OVERALL IN
•
INSIDE SURFACE CONDITION: SMOOTH
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
OUTSIDE DIAMETER: 0.675 INCHES NOMINAL IN
•
MEDIA FOR WHICH DESIGNED: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
OUTER COVERING ENVIRONMENTAL PROTECTIONWEATHERPROOF
NOMINAL THREAD SIZE0.375 INCHES SECOND END IN
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS
MEASURING METHOD AND LENGTH10.000 INCHES NOMINAL OVERALL IN
INSIDE SURFACE CONDITIONSMOOTH
THREAD SERIES DESIGNATORNPT FIRST END
OUTSIDE DIAMETER0.675 INCHES NOMINAL IN
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
HYDROSTATIC TEST PRESSURE800.0 POUNDS PER SQUARE INCH LBS
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
25531Interchangeable
interchangeable cross-reference
interchangeable
6-37-104Interchangeable
interchangeable cross-reference
interchangeable
10391Interchangeable
interchangeable cross-reference
interchangeable
4220PL1074382Interchangeable
interchangeable cross-reference
interchangeable
4220PL1663476Interchangeable
interchangeable cross-reference
interchangeable
7-974-001635Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 25531N?
25531N is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 25531N?
There are 10 known substitutes for 25531N: 25531, 6-37-104, 10391 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 25531N?
25531N is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-251-6977. 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