Stewart Fastener 12SA Ship Auger Drill Bit 3/4 X 18 in

Product Description

The STEWART FASTENER 12SA is a 12-inch ship auger drill bit designed for boring large-diameter holes through heavy timber, thick lumber, and structural wood members. Measuring 3/4 inch in diameter and 18 inches in length, it provides the reach and cutting capacity needed for deep boring applications. The ship auger profile features a lead screw tip that pulls the bit through the material and a single-spur cutting edge that delivers clean, aggressive cuts. It is a standard tool for carpenters, construction crews, electricians, and plumbers who need to run conduit, pipe, or cable through framing and structural assemblies.

The 12SA is suited for residential and light commercial framing, rough carpentry, and through-boring applications where standard bit lengths fall short. Common uses include boring through multiple stud bays, floor joists, rim boards, and timber framing for mechanical, electrical, and plumbing rough-in work. The 18-inch length allows access in confined areas where extension bits or flex shafts may not be practical.

Key Features

• 3/4 inch cutting diameter for pipe, conduit, and cable routing applications
• 18-inch overall length provides extended reach through deep structural members
• Lead screw tip pulls the bit through material and reduces feed pressure required
• Ship auger profile designed for deep, aggressive boring in solid wood and engineered lumber
• Compatible with standard 1/2-inch chuck heavy-duty drill drivers and right-angle drills

Compatibility

Designed as an OEM-style replacement and standard-fit ship auger bit for use in any heavy-duty corded drill or right-angle drill with a 1/2-inch or larger chuck capacity.

Installation Notes

Ship auger bits are typically used by carpenters, electricians, and plumbers during rough-in framing stages. Use a heavy-duty corded drill or right-angle drill with a 1/2-inch chuck for best results, as ship augers require significant torque. Keep the drill speed moderate and allow the lead screw to do the feeding work to avoid bit walking or binding. Always confirm that no wiring, piping, or fasteners are present in the boring path before drilling.

Technical Specifications

• Cutting Diameter: 3/4 inches
• Overall Length: 18 inches
• Bit Type: Ship Auger
• UPC: 662352400541

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: 12SA