Value Collection 101679BR Set Screw 3/4-10 X 3 in Cup Point Grade 8

Product Description

The VALUE COLLECTION 101679BR is a 3/4-10 x 3 inch cup point set screw manufactured from Grade 8 alloy steel. Set screws are fully threaded fasteners with no head, designed to secure a component — such as a pulley, gear, or collar — against a shaft by applying direct clamping force through the point. The cup point geometry bites into the mating surface for strong rotational and axial holding power. This fastener uses a 3/8 inch internal hex (Allen) drive and conforms to ASME/ANSI B18.3 and ASTM F912 standards. It is suited for high-load industrial, mechanical, and HVAC equipment assembly applications where a flush or recessed fastener is required.

This set screw is used in mechanical assemblies across industrial, commercial, and residential applications. Common uses include securing shaft collars, sprockets, pulleys, and couplings in HVAC equipment, pumps, conveyor systems, and general machinery. The 3/4-10 UNC thread and 3-inch overall length make it appropriate for heavier-duty assemblies requiring deep thread engagement. Installers working on rotating equipment, fan assemblies, or motor shaft components will find this size commonly specified in OEM and field-repair contexts.

Key Features

• Cup point tip bites into shaft surface for strong axial and rotational holding force
• Grade 8 alloy steel construction for high tensile and proof load capacity
• 3/8 inch internal hex drive accepts standard Allen wrenches and hex keys
• 3/4-10 UNC thread standard ensures broad compatibility with tapped holes to that specification
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• Fully threaded headless design allows flush or below-surface installation

Compatibility

Designed for use in any tapped 3/4-10 UNC threaded hole requiring a cup point set screw with a 3-inch overall length. Suitable as a replacement or field-supply fastener in mechanical and HVAC shaft-locking applications where ASME/ANSI B18.3 compliance is specified.

Installation Notes

Set screws of this type are installed by licensed mechanics or technicians using a 3/8 inch hex key or Allen wrench; power-down and lockout/tagout of rotating equipment must be completed before service. Ensure the mating shaft or bore surface is clean and free of debris before driving the screw to seat. Do not over-torque — refer to the equipment OEM torque specification for the applicable shaft diameter and application. Thread engagement and seating torque should comply with applicable ASME or equipment manufacturer guidelines.