LiftMaster K87-P-075 Push-On Fastener —3/4-Inch Designation

The LiftMaster K87-P-075 is the push-on fastener service reference identified with a 3/4-inch designation in manufacturer commercial-operator parts information. It is a retention component rather than a bearing, washer or complete shaft kit. Match the exact shaft location and repair drawing before ordering. A fastener that appears to grip a shaft is not necessarily the specified retaining part, and the size designation alone does not establish fit for every3/4-inch connection. Inspect the shaft and adjoining components before treating a new fastener as the whole repair.

Compatibility — Models, Versions and Exclusions

Inspect the Shaft and Retained Components

Record the operator and photograph the fastener location before removing retained parts. Have the technician inspect the shaft surface, adjoining washer or bearing and the reason retention failed. A new push-on fastener cannot restore a worn shaft or a component that is moving because another support is damaged. Do not add improvised retainers to conceal an unresolved fit problem.

Follow the exact assembly procedure for removal, replacement and retention. Avoid selecting a generic clip based only on approximate diameter, and do not assume a removed fastener can be reused. Support connected components while retention is disturbed. After service, verify the intended shaft position and clear movement, restore guards and complete the operator’s prescribed travel and safety checks before returning equipment to normal operation.

Specifications and Product Identification

Before Ordering

• Record exact operator and retention location.
• Match K87-P-075 and 3/4-inch designation.
• Inspect shaft, adjoining parts and cause of movement.
• Confirm supplied quantity and replacement instructions.

Package Contents and Separate Requirements

This offer identifies the K87-P-075 push-on fastener. A bearing, shaft, washer, spring, complete clutch kit and operator are not promised as included. Confirm the current supplied quantity before ordering spares. A complete shaft kit may include a retaining fastener, but ordering this individual service item does not supply that larger assembly. Identify any damaged mating surfaces or supports separately before planning the repair.

Safety Warnings — Read Before Installation or Service

• WARNING: A moving commercial door and exposed shaft retention and connected rotating parts can cause serious injury or death. Have a trained door-systems technician perform installation and service.
• Disconnect mains power and any battery backup before mechanical work or wiring. Secure the door against unexpected movement as directed by its manufacturer.
• Do not work on springs, cables or counterbalance components without appropriate training. Never bypass safety sensors or increase force to overcome binding.
• Restore guards and complete the model-specific travel, reversal and protection-device tests before returning the door to normal operation.

Related Products and Important Differences

• CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.

Frequently Asked Questions

Is it a bearing?

No. It is the specified push-on retaining fastener.

Does3/4inch guarantee every shaft fit?

No. Match the exact service reference and location.

Can removed hardware be reused?

Follow the manufacturer’s exact service instructions rather than assume reuse.

Will it fix a worn shaft?

No. The shaft and supports require separate assessment.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.