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Technical Data Sheet
PartsTable / COMPONENT / M26521A4.0R180
M26521A4.0R180 ✓ 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 M26521A4.0R180 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-01-024-6375, 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
M26521A4.0R180
NSN: 4720-01-024-6375
FSC: 4720
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM26521A4.0R180
NSN4720-01-024-6375
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: M26521A4.0R180 · 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
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
INSIDE SURFACE CONDITION: SMOOTH
•
MEDIA FOR WHICH DESIGNED: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
INSIDE DIAMETER: 4.000 INCHES NOMINAL IN
•
HYDROSTATIC TEST PRESSURE: 260.0 POUNDS PER SQUARE INCH LBS
•
LAYER COMPOSITION AND LOCATION: OUTER LAYER MOLDED RUBBER, CHLOROPRENE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT FIRST END
INSIDE SURFACE CONDITIONSMOOTH
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
THREAD DIRECTIONRIGHT-HAND FIRST END
INSIDE DIAMETER4.000 INCHES NOMINAL IN
HYDROSTATIC TEST PRESSURE260.0 POUNDS PER SQUARE INCH LBS
LAYER COMPOSITION AND LOCATIONOUTER LAYER MOLDED RUBBER, CHLOROPRENE
BURST TEST PRESSURE700.0 POUNDS PER SQUARE INCH LBS
MEASURING METHOD AND LENGTH180.000 INCHES NOMINAL EXCLUDING END FITTINGS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MIL-DTL-26521Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-26521Interchangeable
interchangeable cross-reference
interchangeable
M26521F6.0T3000Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-27508Interchangeable
interchangeable cross-reference
interchangeable
9058AInterchangeable
interchangeable cross-reference
interchangeable
M26521A3.0R0120Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M26521A4.0R180?
M26521A4.0R180 is a M26521A4.0R180.
What parts can replace M26521A4.0R180?
There are 23 known substitutes for M26521A4.0R180: MIL-DTL-26521, MIL-H-26521, M26521F6.0T3000 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M26521A4.0R180?
M26521A4.0R180 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-01-024-6375. 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