Value Collection MSC67703967X Threaded Taper Pin Size 4

Product Description

The VALUE COLLECTION MSC67703967X is a Size 4 threaded taper pin machined from C-12L14 free-machining steel with an uncoated finish. The large end diameter measures 0.248 inches and the pin length is 4 inches. A 1/4-28 UNF thread at the small end accepts a nut to secure the pin against withdrawal, making this design suitable for applications that require positive retention under vibration or dynamic load. Machinists, millwrights, and maintenance technicians use this style of pin to align or lock mating components such as hubs, collars, and levers on shafts.

This threaded taper pin is used wherever a standard taper pin risks backing out due to vibration or frequent assembly and disassembly cycles. Common applications include industrial machinery, power transmission assemblies, and mechanical fixtures in both production and MRO environments. The pin conforms to AN386 standards, making it appropriate for aerospace-adjacent and precision-industrial assembly work where standardized taper geometry is required. It is sold and packaged as a single unit.

Key Features

• Size 4 taper pin with 0.248-inch large end diameter and 4-inch pin length
• C-12L14 free-machining steel construction for consistent dimensional accuracy
• 1/4-28 UNF thread at small end for positive nut retention
• Maximum diameter tolerance of 0.0013 inches for precise taper fit
• Meets AN386 standard for taper pin geometry
• Uncoated finish suitable for further treatment or direct installation

Compatibility

Designed as a standard AN386 Size 4 threaded taper pin for use in mechanical assemblies requiring a 1/4-28 threaded retention feature. Verify bore taper geometry and fit class in the mating component before installation.

Installation Notes

Threaded taper pins are typically driven into a reamed tapered hole using a pin driver or mallet until the taper seats firmly, then a 1/4-28 nut is threaded onto the small end to prevent withdrawal. De-energize and lock out all machinery before installing or removing taper pins in rotating or load-bearing assemblies. Use a properly sized taper reamer matched to the AN386 Size 4 geometry to prepare the mating bore. Do not over-drive the pin, as this can deform the taper or split the hub.