Value Collection MSC67703728X Threaded Taper Pin Size 4

Product Description

The VALUE COLLECTION MSC67703728X is a Size 4 externally threaded taper pin machined from C-12L14 free-machining steel with no surface coating applied. The pin features a large end diameter of 0.248 inches and a neck diameter of 0.198 inches, with a maximum diameter tolerance of 0.0013 inches for precise fitment. The threaded end is sized 1/4-28 UNF, allowing a nut to be applied to lock the pin securely in a tapered hole. This fastener is used to secure hubs, collars, levers, and similar components to shafts in mechanical assemblies and is typically installed by machinists, millwrights, and maintenance technicians.

Threaded taper pins are a standard fastening solution in industrial machinery, HVAC equipment frames, pump assemblies, and light structural connections where a removable but positive-locking pin is required. The 1/4-28 threaded end makes extraction straightforward using a standard nut and puller setup, which is useful in applications where periodic disassembly is expected. This pin meets AN386 standards and is suited for both original equipment assembly and field replacement work where Size 4 taper pin geometry is specified.

Key Features

• Size 4 taper pin geometry with 0.248 inch large end diameter
• 1/4-28 UNF threaded end for nut-assisted installation and extraction
• C-12L14 free-machining steel for consistent dimensional accuracy
• Maximum diameter tolerance of 0.0013 inches for tight, repeatable fitment
• Uncoated finish — compatible with field-applied lubricants or corrosion treatments as required
• Meets AN386 standard

Compatibility

Designed as a standard AN386 Size 4 threaded taper pin for use in any mechanical assembly or equipment that calls out a Size 4 taper pin hole with a 1/4-28 threaded extraction feature.

Installation Notes

Installation is performed by machinists or maintenance technicians using a taper pin reamer to prepare or verify the mating hole before driving the pin. De-energize and lock out all equipment before installing or removing taper pins from rotating assemblies. Apply a nut to the threaded end and tighten to seat the pin fully; use the same nut against a spacer or puller plate for removal. Follow applicable machinery safety standards and the equipment manufacturer's torque and assembly procedures.