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Technical Data Sheet
PartsTable / COMPONENT / MIL-DTL-26521
MIL-DTL-26521 ✓ 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 INTERNAL TUBE FIRST END, inside_diameter: 4.000 INCHES NOMINAL IN, outside_diameter: 4.625 INCHES NOMINAL IN, end_connection_design: STRAIGHT FIRST END, inside_surface_condition: SMOOTH, media_for_which_designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-088-3053, 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
MIL-DTL-26521
NSN: 4720-00-088-3053
FSC: 4720
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
connection_typeTHREADED INTERNAL TUBE FIRST END
inside_diameter4.000 INCHES NOMINAL IN
outside_diameter4.625 INCHES NOMINAL IN
end_connection_designSTRAIGHT FIRST END
inside_surface_conditionSMOOTH
media_for_which_designedFUEL/OIL, HYDROCARBON SINGLE RESPONSE
cross-sectional_shape_styleROUND
layer_composition_and_location1ST LAYER BRAIDED TEXTILE YARN AND 2ND LAYER BRAIDED TEXTILE YARN AND OUTER LAYER MOLDED RUBBER, SYNTHETIC
NSN4720-00-088-3053
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: MIL-DTL-26521 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
MIL-DTL-26521Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-26521Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-27508Interchangeable
interchangeable cross-reference
interchangeable
9058AInterchangeable
interchangeable cross-reference
interchangeable
M26521A3.0R0120Interchangeable
interchangeable cross-reference
interchangeable
M26521A3.0R1000Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-26521?
MIL-DTL-26521 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace MIL-DTL-26521?
There are 23 known substitutes for MIL-DTL-26521: MIL-DTL-26521, MIL-H-26521, MIL-H-27508 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-DTL-26521?
MIL-DTL-26521 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-088-3053. 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