Value Collection MSC67703843X Taper Pin Size 4 Steel 1/4-28

Product Description

The VALUE COLLECTION MSC67703843X is a Size 4 threaded taper pin manufactured from C-12L14 steel with an uncoated finish. The pin features a 0.248-inch large-end diameter and a 2-inch pin length, with a 1/4-28 threaded end for secure retention in mating assemblies. Maximum diameter tolerance is held to 0.0013 inches, meeting AN386 standards. This type of fastener is designed to align and lock mechanical components — such as shafts, hubs, and brackets — in fixed positions. Machinists, millwrights, and maintenance technicians install these pins where precise, repeatable positioning and easy disassembly are required.

Threaded taper pins in this size range are commonly used in light to medium industrial machinery, drive assemblies, and mechanical linkages where a standard taper pin would require a separate nut or retaining method. The 1/4-28 thread allows a nut to be run up on the small end, preventing the pin from backing out under vibration or cyclic loading. This makes the MSC67703843X well suited for applications in production equipment, conveyor systems, and general mechanical assemblies.

Key Features

• Size 4 taper with 0.248-inch large-end diameter for precise component alignment
• 1/4-28 threaded end allows nut retention to prevent backing out under vibration
• C-12L14 steel construction provides good machinability and consistent dimensional accuracy
• AN386 standard compliance ensures interchangeability with other conforming fasteners
• Maximum diameter tolerance of 0.0013 inches supports tight-fit assemblies
• Uncoated finish suitable for applications where coating buildup would affect fit

Compatibility

Designed as a standard AN386-compliant Size 4 threaded taper pin for use in mechanical assemblies requiring a 1/4-28 threaded taper pin retention fastener.

Installation Notes

Threaded taper pins are typically installed by machinists or maintenance technicians using a pin driver or arbor press to seat the taper uniformly in a reamed hole. The mating hole should be reamed to the appropriate taper before installation to ensure full contact along the pin length. Power down and de-energize all equipment before servicing assemblies containing taper pins. Apply a nut to the threaded end after seating to secure the pin against vibration-induced withdrawal.