Jergens 40702 Tapped Bar Knob 2in Dia 1/2in Thread

Product Description

The JERGENS 40702 is a tapped bar knob designed for use in manual clamping, fixturing, and machine tool applications where a positive hand grip is required. The knob measures 2 inches in diameter and stands 2-1/8 inches high, with a 1/2 inch tapped thread for direct bolt or stud mounting. The hub diameter is 1-1/8 inches and the projection from centerline to nose end is 1-1/4 inches. Constructed from ASTM 32510 malleable iron, it delivers the durability needed in production shop environments. This style of bar knob is typically installed by machinists, toolmakers, or maintenance technicians on jigs, fixtures, and clamping setups.

The JERGENS 40702 is suited for use on machine tool fixtures, drill press tables, milling fixtures, and general workholding equipment in both production and maintenance shop environments. Its tapped-through design allows mounting directly onto a threaded stud or cap screw. The 1/2 inch thread size fits a common fastener standard, making it straightforward to source mating hardware. The bar knob profile provides a natural grip point for operators applying consistent hand torque during setup or adjustment cycles.

Key Features

• 2 inches overall diameter for a secure, full-hand grip
• 1/2 inch tapped thread for direct stud or bolt mounting
• 1-1/4 inches projection from gage line to nose end
• 1-1/8 inches hub diameter for structural rigidity at the mounting point
• ASTM 32510 malleable iron construction for impact and wear resistance
• Prong height of 3/4 inches with 1/2 inch prong diameter

Compatibility

Designed as a standard tapped bar knob for use on jigs, fixtures, and workholding equipment that accept a 1/2 inch threaded stud or fastener. Verify thread pitch and stud length before installation.

Installation Notes

Installation is performed by threading the knob directly onto a compatible stud or cap screw by hand or with light tool assistance. Always ensure the mating fastener thread pitch matches the tapped insert before applying load. Inspect the tapped bore for debris or damage before mounting. No special tools or codes are required for standard fixture assembly, but follow your facility safety procedures when working on powered machinery.