Value Collection MSC67703926X Threaded Taper Pin Size 4

Product Description

The VALUE COLLECTION MSC67703926X is a Size 4 threaded taper pin machined from C-12L14 steel with an uncoated finish. It features a large end diameter of 0.248 inches, a neck diameter of 0.198 inches, and a 1/4-28 threaded end for secure nut retention. The pin body is 3 inches long and meets AN386 standards. Threaded taper pins are used in mechanical assemblies to lock hubs, gears, levers, and collars to shafts, providing precise alignment and resistance to rotational slippage. Machinists, millwrights, and maintenance technicians install these fasteners in both production and field-service contexts.

This threaded taper pin is suited for light-to-medium duty mechanical assemblies where a removable, self-locking fastener is required. The 1/4-28 threaded end accepts a standard nut, preventing the pin from being driven through the assembly under load or vibration. Typical applications include machine tool components, HVAC blower assemblies, pump impeller hubs, and general industrial equipment requiring frequent disassembly and reassembly. The C-12L14 free-machining steel grade is commonly selected where dimensional precision and clean surface finish are priorities over high tensile strength or corrosive environments.

Key Features

• AN386-compliant threaded taper pin for standardized fitment in industrial assemblies
• C-12L14 free-machining steel provides excellent dimensional accuracy and a clean machined finish
• 1/4-28 threaded end accepts a standard nut to prevent pin ejection under load
• Large end diameter of 0.248 inches with a maximum diameter tolerance of 0.0013 inches
• Uncoated finish — suitable for dry or lightly lubricated installations not exposed to corrosive environments
• Size 4 taper pin designation for straightforward cross-referencing to standard taper reamers

Compatibility

Designed as a standard AN386 Size 4 threaded taper pin for use in mechanical assemblies requiring a 0.248-inch large end diameter and 1/4-28 threaded fastening. Verify hole taper and thread engagement with assembly drawings before installation.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a matched taper reamer to finish the pin hole before driving. Always de-energize and lock out the machine before servicing any shaft or hub connection. Drive the pin with a pin driver or soft-faced hammer and secure the threaded end with an appropriate nut to specification. Do not install taper pins in holes that have not been reamed to the correct taper angle, as this will reduce clamping force and shorten service life.