Mayhew Tools 21105 Pin Punch 6in 3/8in Tip Steel

Product Description

The MAYHEW TOOLS 21105 is a 6-inch, one-piece steel pin punch designed for driving out and removing already-loosened pins and keys from metal assemblies. The tool features a 3/8-inch flat tip, a 1/2-inch hexagonal shank, and a black oxide finish that provides corrosion resistance. Tip hardness is rated at 55 to 57 HRC, giving the working end durability against repeated impact. Manufactured in the United States and conforming to ASME B107.410-2008, this punch is built for reliable, long-term use in professional shop and field environments. It weighs 0.35 pounds and requires no handle or handguard.

The 21105 is suited for mechanical, automotive, and general fabrication work where pins or keys need to be removed from fasteners and assemblies without damaging surrounding components. The 1/2-inch hex shank allows for consistent positioning and reduces rolling on work surfaces. A 1-1/4-inch taper length transitions cleanly to the 3/8-inch tip, keeping the punch aligned during use on standard SAE-spec fasteners and hardware. This tool is commonly found in maintenance shops, assembly lines, and field service kits where hand punch work is routine.

Key Features

• One-piece steel construction for maximum durability and impact resistance
• 3/8-inch flat tip rated at 55 to 57 HRC for hardened working performance
• Black oxide finish provides corrosion resistance without added bulk
• 1/2-inch hexagonal shank prevents rolling and aids grip on work surfaces
• Meets ASME B107.410-2008 standard for hand punches
• Made in the United States

Compatibility

Designed for SAE-spec pin and key removal applications in metal assemblies where a 3/8-inch tip diameter is required.

Installation Notes

This punch is a hand tool used by mechanics, machinists, and maintenance technicians. Before use, confirm the target pin or key is already loosened to avoid damaging the workpiece or the punch tip. Strike the punch only with an appropriate ball-peen or cross-peen hammer rated for punch work. Do not use this tool as a chisel or pry device, as lateral loading can damage the tip or shank.

Technical Specifications

• Overall Length: 6 inches
• Tip Size: 3/8 inches
• Tip Type: Flat
• Tip Hardness: 55 to 57 HRC
• Shank Width: 1/2 inches
• Shank Shape: Hexagon
• Taper Length: 1-1/4 inches
• Weight: 0.35 pounds
• Material: Steel
• Finish: Black Oxide
• Design: 1-piece
• Measurement Type: SAE
• Corrosion-Resistant: Yes
• Standards: ASME B107.410-2008
• Country of Origin: United States

Standard Information

• Brand: MAYHEW TOOLS
• Manufacturer Part Number: 21105