Features: BSW - British Standard Whitworth; The angle of thread is 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. ; Specifications:Diameter5/16"Pitch18 tpiLeadBottomingOverall Length72 mmTapping Drill6.5 mm
Features: BSW - British Standard Whitworth; The angle of thread is 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. ; Specifications:Diameter5/16"Pitch18 tpiLeadBottomingOverall Length72 mmTapping Drill6.5 mm
Features: BSW - British Standard Whitworth; The angle of thread is 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. ; Specifications:Diameter5/16"Pitch18 tpiLeadBottomingOverall Length72 mmTapping Drill6.5 mm
Features: BSW - British Standard Whitworth; The angle of thread is 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. ; Specifications:Diameter5/16"Pitch18 tpiLeadBottomingOverall Length72 mmTapping Drill6.5 mm
Last updated at 03/13/2026 14:21:31
Bordo - 5/8" x 14 BSPF HSS Tap Set | 3046-5/8TS
Delivery between 14–23 Mar $7.95
| Diameter | 5/16" |
| Pitch | 18 tpi |
| Lead | Bottoming |
| Overall Length | 72 mm |
| Tapping Drill | 6.5 mm |
Bordo - 5/8" x 14 BSPF HSS Tap Set | 3046-5/8TS
Delivery between 14–23 Mar $7.95
| Diameter | 5/16" |
| Pitch | 18 tpi |
| Lead | Bottoming |
| Overall Length | 72 mm |
| Tapping Drill | 6.5 mm |
