***Requires BSPT Threads

Motor casing

3/8” (10 mm) best for 1 ¼” (32 mm) to 2” (50 mm) lines

0mm thickness

and also lead or rubber-covered communcations cable

Nicholson HSS Jobber Drill Bit for Metal (Inch) 180mm disc ***Requires BSPT ThreadsNicholson HSS Jobber Drill Bit for Metal (Inch) Size Price 1 64" 39. 20 1 32" 32. 00 3 64" 28. 80 1 16" 28. 80 5 64" 33. 60 3 32" 35. 20 7 64" 46. 50 1 8" 36. 00 9 64" 42. 40 5 32" 42. 40 11 64" 45. 60 3 16" 50. 40 13 64" 53. 60 7 32" 59. 20 15 64" 65. 60 1 4" 76. 80 17 64" 84. 80 9 32" 117. 00 19 64" 102. 40 5 16" 113. 60 21 64" 128. 80 11 32" 147. 20 23 64" 153. 60 3 8" 164. 80 25 64" 181. 60 13 32" 195. 20 27 64" 222. 40 7 16" 236. 00 29 64" 251.