Goliath National Pipe Tapered Intermediate HSS Tap

• HSS Bright Finish NPT Hand and Machine Intermediate Tap.
• Pipe taps are much shorter than a similar size of regular hand tap, but the design features are the same.
• Goliath HSS taps provide a high hardness-to-toughness ratio, compressive and tensile strength, good abrasion resistance and resistance to micro-chipping, ensuring a long tool life.
• Tapered Pipe Taps are used for tapered threading by hand or machine.
• National Pipe Tapered (NPT)is a US standard for tapered threads used to join pipes and fittings.
• ANSI/ASME standard B1.20.1 covers threads of 60º form with flat crests and roots.
• The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other.
• However, a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral.
• This means that NPT fittings must be made leak-free with the aid of thread seal tape or a thread sealant compound.
• For each 12" increase in distance from the end, the diameter increases by 3/4".
• Intermediate Taps have a lead of four threads and are used in most general purpose applications to cut a thread true to a pre-drilled pilot hole.
• Manufactured from HSS this general-purpose tap is designed for use in medium tensile materials and is for hand or general machine use.