Thread Milling Tools
BSP ( G )
B.S.84: 1956 INTERNAL / EXTERNAL
ISO 228 - 1: 1994
BSP NUT R.O.137P
55


R.O.137P
BSP
BSP SCREW
SCREW


STRAIGHT FLUTES
THREAD SIZE PITCH ORDERING L L1 D1 D2 NO. OF
FLUTES
TPI CODE
1 1/16"-1/8" 28 TMX06059L11 28BSP 57 11.3 6 5.9 3
2 1/4"-3/8" 19 TMX10099L16 19BSP 73 16.6 10 9.9 4
3 1/2"-7/8" 14 TMX12119L22 14BSP 83 22.7 12 11.9 4
4 1"-2" 11 TMX16159L32 11BSP 105 32.1 16 15.9 4
5
6 BSPT SCREW
7
8
9
BSPT ( Rc )
10
INTERNAL / EXTERNAL
11
B.S.21: 1985
12
BSPT NUT R.O.137P
27.5
13 27.5

14
15 R.O.137P
1 47 90
BSPT SCREW
16
STRAIGHT
17
FLUTES
18 THREAD SIZE PITCH ORDERING L L1 D1 D2 NO. OF
FLUTES
TPI CODE
19
20
1 1/16"-1/8" 28 TMX06059L11 28BSPT 57 11.3 6 5.9 3
21
2 1/4"-3/8" 19 TMX10099L16 19BSPT 73 16.6 10 9.9 4
22
3 1/2"-7/8" 14 TMX12119L22 14BSPT 83 22.7 12 11.9 4
4 1"-2" 11 TMX16159L32 11BSPT 105 32.1 16 15.9 4

6 26
7