Gibraltar G10-2840-B Lobed Knob 3 in 4 Point Phenolic

Product Description

The GIBRALTAR G10-2840-B is a 4-point lobed knob manufactured from phenolic with a gloss black finish. Designed for manual adjustment and clamping applications, this knob provides a secure, no-slip grip on threaded fastener assemblies. It features a 3.0-inch head diameter with a 1/2-13 threaded hole and a 5/8-inch thread depth, making it suitable for medium-duty fastening tasks on equipment panels, jigs, fixtures, and industrial machinery. The phenolic construction resists oil, grease, and moderate heat, making it appropriate for shop-floor and mechanical environments where a durable, non-metallic grip point is needed.

This lobed knob is used in manufacturing, maintenance, and assembly applications where operators need to hand-tighten or loosen fasteners without tools. Typical installations include clamping fixtures, positioning arms, panel covers, guards, and adjustment mechanisms on industrial equipment. The 4-lobe profile gives good torque transfer by hand, and the gloss finish resists surface wear under repeated use. It is sold individually and is suitable for facilities maintenance, machine shop, and trade workshop environments.

Key Features

• 4-point lobe profile for firm hand-grip and manual torque transfer
• 3.0-inch head diameter for easy handling on adjustment and clamping assemblies
• 1/2-13 threaded hole with 5/8-inch thread depth for standard fastener compatibility
• Phenolic construction resists oil, grease, and moderate heat
• Gloss black finish for surface durability and wear resistance
• 7/8-inch hub diameter provides a stable base at the fastener interface

Compatibility

Designed as an OEM-style replacement or direct-fit knob for equipment and machinery using 1/2-13 threaded fastener assemblies requiring a 3.0-inch lobed phenolic hand knob.

Installation Notes

Installation requires no special tools - thread the knob onto a 1/2-13 fastener or stud by hand. Ensure the mating thread is clean and free of debris before installation. Do not use power tools to drive this knob, as phenolic material can crack under excessive rotational force. Follow all applicable equipment lockout/tagout procedures before servicing fastener assemblies on powered machinery.