Nails Bostitch PT 33 3.1 x 70 mm Ring-shank for pneumatic nailer PT31R70

Bostitch PT 33 ring-shank nails, size 3.1 x 70 mm, are fastening nails intended for use with compatible pneumatic nailers. The ring-shank profile increases withdrawal resistance compared with smooth-shank nails, making these fasteners suitable for structural timber connections and exterior applications where secure holding is important. Manufactured for consistent driving and alignment, these nails are designed to deliver reliable performance in framing and heavy-duty carpentry tasks.

Advantages

The ring-shank design provides enhanced holding power in soft and treated timber by creating mechanical interlock with surrounding wood fibers. The 3.1 mm shank diameter and 70 mm length balance shear strength and penetration depth for common construction tasks. These nails are compatible with pneumatic nailers designed for collated or loose ring-shank nails, offering consistent feed and drive characteristics for repetitive work. Their geometry reduces the likelihood of pullout under vibration or load compared with smooth-shank alternatives.

Suitable for

• Framing of walls, roofs and substructures
• Decking and outdoor timber assemblies
• Sheathing and structural panel attachment
• General heavy carpentry and timber joining where increased withdrawal resistance is needed

Key specifications

• Shank type: ring-shank for improved withdrawal resistance
• Shank diameter: 3.1 mm
• Length: 70 mm
• Material: steel (standard construction grade)
• Head style: full round/standard nail head suitable for pneumatic driving

How to use

Select a pneumatic nailer compatible with ring-shank nails and with the appropriate magazine and driving pressure for 3.1 x 70 mm fasteners. Load the nails according to the tool manufacturer's instructions, set the air pressure within the recommended range, and position the nailer perpendicular to the work surface for accurate seating. Drive nails to the desired depth so the head is flush or slightly countersunk depending on the application. Follow safety procedures including eye protection and secure workpiece handling.

Usage recommendations

For maximum holding performance, use these ring-shank nails in adequately prepped timber with appropriate moisture content; avoid driving too close to board edges to minimize splitting. When fastening treated lumber or outdoor structures, confirm compatibility with the nail coating or consider corrosion-resistant alternatives if exposure conditions require it.