Sutton M2262540 1" x 8 BSW Bottoming Hand Tap - Straight Flute, TCA

The Sutton M226 is a BSW (British Standard Whitworth) bottoming hand tap in 12 sizes, 1/8" to 1", with a straight flute and a square shank, made from Tungsten Chrome Alloy (TCA) and sold singly. A bottoming tap offers a continuous cutting edge with almost no taper and is usually used to cut threads to the bottom of a blind hole.

The square shank is designed for hard threading work in a variety of materials. Carbon taps are not suitable for precision, safety or critical threads. They are for general purpose and DIY use only. The straight flutes are designed for tapping into materials where chips break up readily and present no disposal problems, particularly in through-hole tapping. Straight flute taps are only suitable for hand operations, tapping up to 1-1/2 x diameter. Applications include DIY, trade, automotive, plumbing, metalworking and MRO work.

Where this product is used

• Routine maintenance, repair work and re-threading of BSW threads where high accuracy and tolerance thread is not critical.
• Tapping through holes in materials where chips break up readily.
• Whitworth form (WHIT) thread: 5/32" x 32 BSW.
• Applications include DIY, trade, automotive, plumbing, metalworking and MRO work.

Design features

• Tungsten Chrome Alloy (TCA): carbon taps for general purpose use.
• Square shank: for hard threading work in a variety of materials.
• Straight flutes: suited to through-hole tapping.
• Lead: A bottoming tap offers a continuous cutting edge with almost no taper and is usually used to cut threads to the bottom of a blind hole.

Sizes and item numbers

Tap drill is the drill size to use before tapping.

Using the tap

• Drill the tap drill size shown in the size table for the thread you are cutting, then start the tap square to the hole.
• Turn the tap with a tap wrench on the square shank, backing off regularly to break the chip.
• Use a cutting fluid suited to the material being tapped.
• Use for hand tapping only, to a depth of up to 1-1/2 x the tap diameter.
• The 5/32" size is a Whitworth form (WHIT) 32 TPI thread.

Key specifications

Related products

Related Sutton threading tools: M224 BSW taper taps, M225 BSW intermediate taps, M117 BSW intermediate taps, carded, M227 BSW tap sets of 3, M418 BSW button dies and M447 BSW die nuts. Browse threading tools and threading dies and sets, or Tap Magic cutting fluids.