Gibraltar SSBK-053-G Ball Knob Threaded Hole 1-7/8 in

Product Description

The GIBRALTAR SSBK-053-G is a stainless steel ball knob designed for threaded-hole mounting in industrial, mechanical, and trade applications. It features a 1.875-inch diameter sphere with a smooth grip surface and a 1/2-20 threaded bore machined to a 0.75-inch hole depth. The natural stainless steel finish provides corrosion resistance without coating or plating. This type of knob is commonly installed by machinists, millwrights, and equipment maintenance technicians where a firm, hand-operable control point is needed on jigs, fixtures, clamps, or adjustable machinery components.

The SSBK-053-G suits light-duty to medium-duty equipment panels, enclosures, and fixtures requiring a durable, corrosion-resistant knob. The 1/2-20 fine thread is commonly found on precision adjustment hardware, tooling, and machine frames. The smooth grip profile keeps the profile clean and snag-free in environments where gloves or debris contact is a concern. Typical applications include manufacturing equipment, HVAC equipment access panels, pump housings, and any threaded stud or bolt requiring a hand-tightened knob.

Key Features

• Stainless steel construction for corrosion resistance in demanding environments
• 1/2-20 threaded hole with 0.75-inch hole depth for secure engagement
• 1.875-inch diameter provides adequate grip surface for hand tightening
• Smooth grip profile reduces snag risk and simplifies cleaning
• Natural finish — no coating to chip, peel, or degrade over time

Compatibility

Designed as an OEM-style or aftermarket replacement ball knob for any threaded stud or bolt with a 1/2-20 thread specification on machinery, fixtures, or equipment panels.

Installation Notes

Installation requires no special tools — thread the knob onto a compatible 1/2-20 stud or bolt by hand. Ensure the mating thread is clean and free of debris before installation to prevent cross-threading. Do not use impact tools or excessive torque, as ball knobs are intended for hand operation. Power down or de-energize any equipment before accessing panels or components where this knob will be installed.