HSS Hand and Machine Taps
TAP HSS 3/8 x 18 NPSF TAPER
Tools & Gear Taps & Dies HSS Hand and Machine Taps
Pipe Taps Pipe Taps are supplied with PARALLEL threads or TAPER threads. They 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. NPSF (DRYSEAL)NATIONAL PIPE STRAIGHT FUEL A variation of the Dryseal thread is the NPSF. 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. TAPER TAPS have a lead of eight threads and are used as a starting tap in difficult or high precision holes. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.
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