About this product: HSS BSW Bottoming Hand and Machine Tap. British Standard Whitworth has a thread angle of 55 degrees as opposed to 60 degrees in Metric and Unified threads. This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. 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. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use. Options 3028-1/4B 3028-1/2B 3028-3/8B 3028-3/16B 3030-7/16B 3028-5/16B 3028-5/32B Options 3028-1/2B 3028-1/4B 3028-3/16B 3028-5/16B 3028-3/8B 3030-7/16B 3028-5/32B
About this product: HSS BSW Bottoming Hand and Machine Tap. British Standard Whitworth has a thread angle of 55 degrees as opposed to 60 degrees in Metric and Unified threads. This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. 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. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use. Options 3028-1/4B 3028-1/2B 3028-3/8B 3028-3/16B 3030-7/16B 3028-5/16B 3028-5/32B Options 3028-1/2B 3028-1/4B 3028-3/16B 3028-5/16B 3028-3/8B 3030-7/16B 3028-5/32B
About this product: HSS BSW Bottoming Hand and Machine Tap. British Standard Whitworth has a thread angle of 55 degrees as opposed to 60 degrees in Metric and Unified threads. This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. 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. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use. Options 3028-1/4B 3028-1/2B 3028-3/8B 3028-3/16B 3030-7/16B 3028-5/16B 3028-5/32B Options 3028-1/2B 3028-1/4B 3028-3/16B 3028-5/16B 3028-3/8B 3030-7/16B 3028-5/32B
About this product: HSS BSW Bottoming Hand and Machine Tap. British Standard Whitworth has a thread angle of 55 degrees as opposed to 60 degrees in Metric and Unified threads. This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84:1956. 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. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use. Options 3028-1/4B 3028-1/2B 3028-3/8B 3028-3/16B 3030-7/16B 3028-5/16B 3028-5/32B Options 3028-1/2B 3028-1/4B 3028-3/16B 3028-5/16B 3028-3/8B 3030-7/16B 3028-5/32B
Last updated at 04/16/2026 08:27:09
BSW Bottoming HSS Tap by Bordo 7/16" x 18TPI
30-day returns
| Diameter (inch) | 7/16 |
| Pitch/TPI | 18 |
| Drill Size (mm) | 9.7 |
| Thread Form Type | BSF |
| Overall Length (OAL) mm | 85 |
BSW Bottoming HSS Tap by Bordo 7/16" x 18TPI
30-day returns
| Diameter (inch) | 7/16 |
| Pitch/TPI | 18 |
| Drill Size (mm) | 9.7 |
| Thread Form Type | BSF |
| Overall Length (OAL) mm | 85 |
