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Technical Data Sheet
PartsTable / COMPONENT / M26521C4.0R240
M26521C4.0R240 ✓ 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 M26521C4.0R240 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 4720-00-999-7776, 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
M26521C4.0R240
NSN: 4720-00-999-7776
FSC: 4720
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberM26521C4.0R240
NSN4720-00-999-7776
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: M26521C4.0R240 · 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
•
MEASURING METHOD AND LENGTH: 240.000 INCHES NOMINAL OVERALL IN
•
SPECIFICATION/STANDARD DATA: 81349-MIL-H-26521 GOVERNMENT SPECIFICATION
•
THREAD SERIES DESIGNATOR: NPSH SECOND END
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
END CONNECTION DESIGN: STRAIGHT SECOND END
•
CONNECTION STYLE: GASKET SEAL / OPTIONAL END SECOND END
•
NOMINAL THREAD SIZE: 4.000 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
MEASURING METHOD AND LENGTH240.000 INCHES NOMINAL OVERALL IN
SPECIFICATION/STANDARD DATA81349-MIL-H-26521 GOVERNMENT SPECIFICATION
THREAD SERIES DESIGNATORNPSH SECOND END
THREAD DIRECTIONRIGHT-HAND FIRST END
END CONNECTION DESIGNSTRAIGHT SECOND END
CONNECTION STYLEGASKET SEAL / OPTIONAL END SECOND END
NOMINAL THREAD SIZE4.000 INCHES FIRST END IN
SPECIAL FEATURESINNER CONVEYING TUBE MATERIAL-RUBBER, SYNTHETIC
END FITTING COMPONENT AND MATERIALCOMPLETE FITTING COPPER ALLOY ALL ENDS
CONNECTION TYPETHREADED INTERNAL BOSS SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
22291Interchangeable
interchangeable cross-reference
interchangeable
14254AInterchangeable
interchangeable cross-reference
interchangeable
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
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M26521C4.0R240?
M26521C4.0R240 is a M26521C4.0R240.
What parts can replace M26521C4.0R240?
There are 20 known substitutes for M26521C4.0R240: 22291, 14254A, MIL-DTL-26521 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M26521C4.0R240?
M26521C4.0R240 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-999-7776. 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