Best Npt Drill Size Chart

• Heat treated and tempered for file hard threads, and longer, useful life
• Designed for hand cutting applications
• National pipe thread
• Very strong and durable
• Easy to use

• Quickly and accurately determine the screws size
• Recommends the drill bit or tap size needed for the screw
• Standard & Metric
• Constructed of thick hard plastic for lasting durability
• Smooth easy to clean surface that resists oil and grease