Corrosion-Resistant Mil. Spec. Machinable-Bore Single U-Joints


Made to meet strict military standards for material and construction, these stainless steel U-joints also balance strength with good corrosion resistance. Customize their bores until they fit your shafts. They come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications.
Drill holes through the U-joint and your shafts and then connect using spring pins.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
U-joints with a ball-spring oil fitting keep lubricant in the joint.
For technical drawings and 3-D models, click on a part number.
Torque | |||||||||||||
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For Max. Shaft Dia. | For Max. Shaft Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Speed, rpm | Max. Torque, in.-lbs. | 3° Operating Angle | 10° Operating Angle | Joint Type | Includes | Specifications Met | Each | |
303 Stainless Steel | |||||||||||||
7/32" | 11/16" | 3/8" | 1 3/4" | 35° | 1,500 | 100 | Not Rated | Not Rated | Pin and Block | __ | MIL-U-20625A Class C | 0000000 | 0000000 |
9/32" | 3/4" | 1/2" | 2" | 35° | 1,500 | 375 | Not Rated | Not Rated | Pin and Block | __ | MIL-U-20625A Class C | 0000000 | 000000 |
3/8" | 13/16" | 5/8" | 2 1/4" | 35° | 1,500 | 610 | Not Rated | Not Rated | Pin and Block | __ | MIL-U-20625A Class C | 0000000 | 000000 |
7/16" | 31/32" | 3/4" | 2 11/16" | 35° | 1,500 | 1,000 | Not Rated | Not Rated | Pin and Block | __ | MIL-U-20625A Class C | 0000000 | 000000 |
1/2" | 1 1/32" | 7/8" | 3" | 35° | 1,500 | 1,350 | Not Rated | Not Rated | Pin and Block | __ | MIL-U-20625A Class C | 0000000 | 000000 |
9/16" | 1 3/16" | 1" | 3 3/8" | 35° | 1,500 | 1,900 | 365 in.-lbs. @ 300 rpm | 235 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |
5/8" | 1 7/32" | 1 1/8" | 3 1/2" | 35° | 1,500 | 2,200 | Not Rated | Not Rated | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |
3/4" | 1 1/4" | 1 1/4" | 3 3/4" | 35° | 1,500 | 3,600 | 690 in.-lbs. @ 300 rpm | 450 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |
7/8" | 1 5/16" | 1 1/2" | 4 1/4" | 35° | 1,500 | 7,200 | 1,385 in.-lbs. @ 300 rpm | 900 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |
1" | 1 9/16" | 1 3/4" | 5" | 35° | 1,500 | 10,700 | Not Rated | Not Rated | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |
1 3/16" | 1 5/8" | 2" | 5 7/16" | 35° | 1,500 | 15,500 | 2,980 in.-lbs. @ 300 rpm | 1,935 in.-lbs. @ 300 rpm | Pin and Block | Ball-Spring Oil Fitting | MIL-U-20625A Class C | 0000000 | 000000 |