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Technical Data Sheet
26-163 ✓ Verified by PartsTable
Trefl · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include material: STEEL BODY, bore_type: STRAIGHT, port_style: INVERTED FLARE SINGLE PORT, bore_diameter: 1.750 INCHES NOMINAL IN, overall_length: 6.000 FEET FT, extended_length: 8.000 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 5330-00-118-2164, 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
26-163
NSN: 5330-00-118-2164
FSC: 5330
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL BODY
bore_typeSTRAIGHT
port_styleINVERTED FLARE SINGLE PORT
bore_diameter1.750 INCHES NOMINAL IN
overall_length6.000 FEET FT
extended_length8.000 INCHES NOMINAL IN
special_featuresUSED ON COMPUTER, DIGITAL
compressed_length4.500 INCHES NOMINAL IN
port_thread_class2B SINGLE PORT
seat_angle_in_deg30.0 SINGLE PORT
mounting_provisionTHREADED MOUNTING HOLES
first_end_fork_depth0.375 INCHES NOMINAL ALL WORKING ENDS IN
NSN5330-00-118-2164
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 26-163 MFR: Trefl ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURES1 HOLE OF 0.8125 IN. DIA; 2 HOLES OF 0.34375 IN. DIA IN
OVERALL LENGTH4.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
3580Interchangeable
interchangeable cross-reference
interchangeable
4WE160Interchangeable
interchangeable cross-reference
interchangeable
4WE159Interchangeable
interchangeable cross-reference
interchangeable
26-163Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26-163?
26-163 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK manufactured by Trefl.
What parts can replace 26-163?
There are 4 known substitutes for 26-163: 3580, 4WE160, 4WE159 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26-163?
26-163 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-118-2164. This indicates validated use in U.S. government and defense supply chains.
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