Gibraltar 646415-G Press Fit Rest Button Low Carbon Steel

Product Description

The GIBRALTAR 646415-G is a press fit rest button designed for use in tooling, fixtures, and workholding applications where precise part location and stable workpiece support are required. Constructed from low carbon steel with a ground finish and black oxide coating, this button provides consistent seating and corrosion resistance in shop environments. It measures 0.75 inches overall length with a 0.25 inch head height, 0.5 inch outside diameter, and a 0.251 inch pin diameter. Installation requires no threading — the ground press fit shank drives directly into a prepared bore for a secure, repeatable fit.

Press fit rest buttons like the 646415-G are commonly used by tool and die makers, machinists, and fixture builders in production and job shop settings. They provide a hardened, stable reference surface for locating raw castings, forgings, and machined workpieces during milling, drilling, and inspection operations. The black oxide finish suits applications where light corrosion protection is needed without significant dimensional buildup.

Key Features

• Ground press fit shank for precise, repeatable installation in bored holes
• Low carbon steel construction with black oxide finish for corrosion resistance
• 0.251 inch pin diameter for consistent bore fit and location accuracy
• 0.25 inch head height provides a stable, low-profile workpiece contact surface
• 0.5 inch outside diameter suits standard tooling plate and fixture block bores

Compatibility

Designed as an OEM-style replacement or standard tooling component for press fit rest button applications in machining fixtures, workholding setups, and tooling plates requiring a 0.251 inch press fit bore.

Installation Notes

Installation is performed by qualified machinists or toolmakers using a press or arbor press to drive the button into a precision-bored hole sized to the pin diameter. The receiving bore should be prepared to the appropriate interference fit tolerance before pressing. Do not hammer the button directly without a driver to avoid damage to the head or bore. Remove all chips and debris from the bore prior to installation to ensure full seating.