Jergens 40707 Tapped Bar Knob 3.5in Dia 0.5in Thread

Product Description

The JERGENS 40707 is a tapped bar knob designed for manual adjustment and clamping applications in industrial and mechanical assemblies. It measures 3.5 inches in diameter and stands 2.375 inches high, with a 0.5 inch thread for straightforward installation on threaded studs or bolts. The hub diameter is 2.125 inches and projection from gage line to nose end is 2.375 inches. Constructed from ASTM 32510 malleable iron, this knob delivers reliable strength and resistance to impact in demanding shop and production environments. Machinists, toolmakers, and maintenance technicians commonly install this type of hardware on jigs, fixtures, machine guards, and adjustable assemblies.

This tapped bar knob is suited for use in industrial manufacturing, tooling, and general machine shop environments where a secure, hand-operable grip is needed. It fits applications requiring a compact, robust knob on threaded fasteners in both light and moderate-duty clamping or positioning assemblies. The malleable iron construction makes it a dependable choice for environments where repeated adjustment under load is expected.

Key Features

• 3.5 inch overall diameter provides a wide grip surface for hand operation
• 0.5 inch tapped thread for direct mounting on standard threaded hardware
• ASTM 32510 malleable iron construction for impact resistance and durability
• 2.375 inch projection from gage line to nose end suits recessed and flush mounting scenarios
• 2.125 inch hub diameter for stable load distribution at the mounting point
• Prong height of 0.875 inches and prong diameter of 0.625 inches for positive hand engagement

Compatibility

Designed as a direct-fit replacement or new-install tapped bar knob for industrial jigs, fixtures, and machine assemblies requiring a 0.5 inch threaded connection.

Installation Notes

Installation of tapped bar knobs is typically performed by machinists or maintenance technicians using standard hand tools. Ensure the mating threaded stud or bolt is clean and free of debris before threading the knob into place. De-energize or lock out any machine before servicing or replacing knobs on operating equipment. Do not exceed the load rating of the mating fastener or assembly hardware.