Couplers, Pin & Block U-Joints & Mil-Spec
Mil-Specification
Universal Joints
These Universal Joints are similar to military
specification joints for aircraft and have become the
select choice of drag racers due to their lightweight
design. A lubricant-filled silicone boot provides
maintenance-free operation for extended universal
joint life. This boot is designed to operate under high
temperature conditions, with a continuous rating
of 650°F. Please note nominal size is the outside
diameter. Not intended for street use.
Part No. Description Part No. Description
FR1940 3/4” x 9/16”-26 FR1944 3/4” x 3/4”-30
FR1941 3/4” x 3/4”-36 FR1945 3/4”-DD x 3/4”-DD
FR1942 3/4”-36 x 3/4”-36 FR1946 3/4” x 3/4”-DD
FR1943 3/4” x 5/8”-36 FR1948 3/4” x 11/16”-36
IMPORTANT: This is a lightweight application that is not
designed for circle track, street, or highway use and not
recommended for steering. Please see inch lbs. Torque rating
listed in the chart above to determine if this is suitable for
your application. Ideal for shifter linkage.
Couplers are available for direct steering connections
where an angle is not required. Couplers can also be
to extend the steering shaft. Overall length is 2” with
outside diameter of 1” (except FR1942, which is 1-1/4”).
Steel Pin and Block Universal Joints
The preferred choice of drag racers for their
sleek and lightweight design. These are available
in both 1-1/4” and 1” diameter designs.
Note: For racing applications only –
NOT recommended for street use. Frequent
lubrication required.
Not For Street Use
Specifififififififification
Part No. Nominal
Size
O.D.
O.D.
“A”
+.000
- .002
I.D.
“G”
+ .004-
.001
Max Dia.
“J”
+1/64
Length
“B”
+/- 1/
Max
“C”
Min
“D”
FR1800B8 1/2” .495 .375 29/32 2-5/16” 5/8” 11/16”
FR1800B10 5/8” .620 .500 1-3/32” 2-3/4” 3/4” 13/16”
FR1800B12 3/4” .745 .625 1-1/32” 3-3/16” 7/8” 15/16”
FR1800B14 7/8” .870 .750 1-1/2” 3-5/8” 1” 1-1/16”
“H”
+/-
1/64
Wt.
(Lbs.)
Min.
Ult.
Static
Torque
(In
Lbs.)
Axial
Tension
& Comp.
(Lbs.)
Tensional
Play
Max
Degrees
Endurance
torque
Test
(In.
Lbs)
FR1800B8 9/16” .079 675 1,000 0.62 90
FR1800B10 11/16 .133 1,200 1,500 0.50 162
FR1800B12 13/16 .212 2,100 2,000 0.42 285
FR1800B14 15/16 .314 3,500 3,500 0.36 450
Part No. Description O.D.
FR1900 3/4” x 3/4” 1-1/4”
FR1901 3/4” x 9/16”-26 1-1/4”
FR1902 3/4” x 3/4”-36 1-1/4”
FR1903 3/4” x 3/4”-30 1-1/4”
FR1904 3/4” x 5/8”-36 1-1/4”
FR1905 9/16”-26 x 3/4”-36 1-1/4”
FR1906 3/4” x 13/16”-36 1-1/4”
FR1907 5/8”-36 x 7/8” 1-1/4”
FR1820 3/4” x 3/4” 1”
FR1821 3/4” x 9/16”-26 1”
FR1822 3/4” x 5/8”-36 1”
108