Tools & Gear Taps & Dies HSS Hand and Machine Taps

• 3/8" x 18 NPSF Bottoming HSS Tap
• HSS NPSF Bottoming Hand and Machine Tap.
• National Pipe Straight Fuel (Dryseal) is a variation of the Dryseal thread.
• It is used for internal threads and an NPTF external thread can be screwed into it to provide both a satisfactory mechanical connection and hydraulic seal.
• A combination of a parallel and tapered thread would not appear to be ideal but it is widely used.
• Many quick disconnect couplers for example have the NPSF thread and are recommended by the manufacturer for use with NPT and NPTF.
• Bottoming Taps have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole.
• Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.