671 Series Slim-Line Master Cylinder Home > Master Cylinders >Push-Type Master Cylinders
> 671 Series Master Cylinders
  • Similar to our 670 series but with cross-drilled lower attach
  • Simple design assures long trouble free service.
 • Outlet Ports: 1/8" NPT
• Max Pressure = 1,200 psi
• For use with MIL-H-5606 Fluid
Click on Part Number for
Dimensional Data
 Select from 1/2" or 3/8" diameter Eye-Bolt End. Both are drilled with 3/16" diameter holes.

Lower end is cross drilled with 3/16" diameter holes for inline or 90 degree installation.  Lower end "boss" is 3/4" diameter and 0.680" long.
Part Number
671-21 shown

Piston Stroke = 1.4"


Displacement of master cylinders
with a piston bore of 5/8" is 0.429 cu-in.

Displacement of master cylinders with
a piston bore of 9/16" is 0.348 cu-in.

Displacement of master cylinders with a piston bore of 1/2" is 0.275 cu-in.
Part No.
5/8" Bore		 Part No.
9/16" Bore		 Part No.
1/2" Bore		 Pin-to-Pin
Length		 Upper
Attachment		 Lower
Attachment		 Weight Price
671-18 671-918 671-518 7.5" Clevis Cross Drilled 5.9 oz. $389.00
671-19 671-919 671-519 8.0" Clevis Cross Drilled 6.2 oz. $389.00
671-20 671-920 671-520 7.5" 1/2" Eye Bolt Cross Drilled 5.9 oz. $389.00
671-21 671-921 671-521 7.5" 3/8" Eye Bolt Cross Drilled 5.9 oz. $389.00
671-22 671-922 671-522 8.0" 1/2" Eye Bolt Cross Drilled 6.2 oz. $389.00
671-23 671-923 671-523 8.0" 3/8" Eye Bolt Cross Drilled 6.2 oz. $389.00

Our standard master cylinder has a piston bore of 5/8" and is recommended for most aircraft. For aircraft with oversized tires, poor brake pedal geometry, etc. you may wish to use a master cylinder with a piston diameter of 9/16" which produces 19% more brake fluid pressure or 1/2" which produces 36% more pressure.