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PartsTable / COMPONENT / 388 066 C91
388 066 C91 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include material: IRON CAST BODY, bore_type: STRAIGHT, port_style: INVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED, bore_diameter: 0.938 INCHES NOMINAL IN, overall_width: 2.500 INCHES NOMINAL IN, overall_height: 1.688 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 2530-00-116-9399, 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
388 066 C91
NSN: 2530-00-116-9399
FSC: 2530
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialIRON CAST BODY
bore_typeSTRAIGHT
port_styleINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
bore_diameter0.938 INCHES NOMINAL IN
overall_width2.500 INCHES NOMINAL IN
overall_height1.688 INCHES NOMINAL IN
features_providedBLEEDER VALVES AND RUBBER BOOT
mounting_positionLEFT
port_thread_class2B LOCATION NOT OTHERWISE SPECIFIED
seat_angle_in_deg42.0 LOCATION NOT OTHERWISE SPECIFIED
mounting_provisionTHREADED MOUNTING HOLES
port_thread_diameter0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN2530-00-116-9399
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CYLINDER ASSEMBLY,HYDRAULIC BRAK TITLE COMPONENT PN 388 066 C91 MFR CYLINDER ASSEMBLY,HYDR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
37155Interchangeable
interchangeable cross-reference
interchangeable
388066C91Interchangeable
interchangeable cross-reference
interchangeable
774962Interchangeable
interchangeable cross-reference
interchangeable
81145Interchangeable
interchangeable cross-reference
interchangeable
5162Interchangeable
interchangeable cross-reference
interchangeable
AL125Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 388 066 C91?
388 066 C91 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What parts can replace 388 066 C91?
There are 9 known substitutes for 388 066 C91: 37155, 388066C91, 774962 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 388 066 C91?
388 066 C91 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2530-00-116-9399. 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