Value Collection MSC67550327X Size 4 Taper Pin Uncoated Steel

Product Description

The VALUE COLLECTION MSC67550327X is a Size 4 taper pin machined from C-12L14 steel in an uncoated finish. Taper pins are solid, machine-tapered fasteners used to secure hubs, collars, and mating components on shafts, preventing rotational slippage under load. This pin measures 1.75 inches overall length with a small end diameter of 0.2136 inches and a large end diameter of 0.25 inches, conforming to ANSI/ASME B18.8.2 dimensional standards. The slight taper locks the pin firmly in a reamed hole when driven, allowing for repeatable removal and reinstallation without permanent deformation of the assembly.

Taper pins of this size are suited for light-to-medium duty mechanical assemblies found in HVAC equipment, pump drives, fan shaft assemblies, and general industrial machinery. Machinists, millwrights, and mechanical service technicians use taper pins when a precise, removable shaft-to-hub connection is required. The C-12L14 free-machining steel grade is a common choice for applications where weldability is not a requirement but close-tolerance machinability is.

Key Features

• ANSI/ASME B18.8.2 compliant for dimensional interchangeability with standard taper pin reamers and tooling
• C-12L14 free-machining steel construction provides consistent surface finish and dimensional accuracy
• Size 4 taper with 0.2136-inch small end and 0.25-inch large end for positive self-locking fit
• 1.75-inch overall length suits shallow hub and collar installations
• Uncoated finish maintains close diameter tolerances without plating buildup
• Diameter tolerance of -0.0007 to +0.0013 inches for controlled fit in reamed holes

Compatibility

Designed as an OEM-style replacement or standard service pin for mechanical assemblies requiring a Size 4 ANSI/ASME B18.8.2 taper pin in steel.

Installation Notes

Taper pins are installed by machinists or mechanical technicians using a matched taper pin reamer to prepare the hole before driving the pin. De-energize and lock out all equipment before disassembly or pin installation. Drive the pin with a pin punch and hammer, ensuring full seating without deforming the surrounding material. Removal requires a drift punch applied to the small end; never force a taper pin into an unreamed or misaligned hole.