Goliath 1" x 12 TPI UNF Spiral Point (Gun) HSS-Co5 Tap - C20DE3SP
Available
Goliath is an Australian precision cutting tool brand supplying HSS taps, threading dies, tap and die sets, thread gauges, and key steel to engineering, manufacturing, maintenance, and toolmaking operations across Australia. This page covers the Goliath UNF Spiral Point (Gun) HSS-Co5 Bright Tap, available in 18 diameter options: 1", 1/2", 1/4", No. 2, 3/4", 3/8", No. 3, No. 4 and 10 more.
Goliath HSS-Co5 cobalt spiral point gun taps cut internal threads in through holes at machine speeds, pushing chips ahead of the cutting edge.
Where this product is used
Goliath spiral point machine tap products are used across engineering workshops, production machining, and industrial maintenance programs.
- High-speed tapping of through holes where chips can be pushed ahead of the cutting edge.
- CNC and production threading in mild steel, aluminium, and non-ferrous materials.
- Production environments requiring fast, efficient internal thread cutting in through-hole applications.
Key specifications
| Specification | Detail |
|---|---|
| Material Grade | HSS-Co5 Cobalt |
Selecting the right option
Spiral point (gun) taps suit through-hole tapping — chips are pushed ahead of the cut, not back through the hole. HSS-Co5 cobalt grade suits harder materials and machine-speed production tapping. Do not use gun taps in blind holes — chips have nowhere to go and will pack, causing breakage.
Resources
Couldn't load pickup availability
Secure Checkout. We do not store credit card details
Goliath UNF Spiral Point (Gun) HSS-Co5 Bright Tap: 1" / 12
SKU: A0198740 | Model: C20DE3SP
This is the diameter 1", tpi 12 option of the Goliath UNF Spiral Point (Gun) HSS-Co5 Bright Tap. Key details for this option: thread form type UNF, drill diameter 23.25mm.
Goliath UNF Spiral Point (Gun) HSS-Co5 Bright Tap
HSS-Co (Cobalt) Bright Finish UNF Spiral Point Machine Tap.
HSS-Co Spiral Point (Gun Nose) Taps.
Spiral point taps, also known as 'Gun nose taps', have straight flutes supplemented by angular cutting faces at the lead.
The design of the cutting portion propels the swarf ahead of the tap leaving the flutes clear for the flow of coolant to the cutting teeth.
Primarily designed for use in through holes, these taps can be used in blind holes provided that there is ample clearance beyond the threaded section to accommodate the swarf.
The advantages of a gun nose tap are the shearing action of the angular cutting faces, which produces a fine finish on the threads and shallower flutes.
This allows a stronger cross-section throughout the tap.
Unified National Fine (UNF) thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada and the UK.
The thread profile of UNF is the same as for metric threads and is described in the JIS B0206 standard.
The thread is described by its major diameter and the number of threads per inch of length (TPI).
When used on external threads this series has a greater tensile stress area than coarse threads of the same size.
Fine series threads will resist stripping out better than coarse threads in areas where the external and mating internal threads are subjected to loads equal to or greater than the capacity of the screw or bolt.
Fine threads are also used where the length of engagement is limited 1-1/4 or where wall thickness demands a fine pitch.
Manufactured from HSS-Co5, this modern design tap uses straight flutes supplemented by angular cutting faces at the point to produce a fine finish on the threads.
Shallower flutes achieve a stronger cross section allowing the tap to withstand greater cutting forces.