103 UNIVERSAL JOINTS & STEERING SHAFTS: COUPLERS / PIN & BLOCKS / MIL-SPEC
STEERING COUPLERS
NOT FOR STREET USE
MIL-SPEC U-JOINTS
STEEL PIN & BLOCK U-JOINTS
Couplers are available for direct steering connections
where an angle is not required. Couplers can also be used
to extend the steering shaft. Overall length is 2” with an
outside diameter of 1” (except FR1942, which is 1-1/4”)
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
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.
PART NUMBER DESCRIPTION OUTER DIMENSION
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”
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. 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
This is a lightweight application that is not
designed for circle track, street or highway
use and not recommended for steering. Ideal
for shifter linkages.