®
Thread Turning Inserts
Vertical API
EXTERNAL Ordering Code
Pitch TPI
Taper IPF
Connection No. or Size 2 3/8 -4 1/2 REG NC23-NC50 NC56-NC77 6 5/8 REG
Thread Form
L I.C. in
Y T
TNMB 54 ER 5 API 403 TNMC 55 ER 4 API 382 TNMC 55 ER 4 API 383 TNMC 55 ER 4 API 502 TNMC 55 ER 4 API 503
V-0.040
5
27 5/8 3 27 5/8 2 27 5/8 3 27 5/8 2 27 5/8 3
2.5 6.4 2.8 7.94 2.8 7.94 3.0 7.94 3.0 7.94
V-0.038R 4 V-0.038R 4
V-0.050 V-0.050
4 4
5 1/2 ,7 5/8 , 8 5/8 REG
Vertical inserts to be used with compatible holders on the market
Order example: TNMC 55 ER 4 API 503 BMA
INTERNAL Ordering Code
Pitch TPI
Taper IPF
Connection No. or Size 2 3/8 -4 1/2 REG NC23-NC50 NC56-NC77 6 5/8 REG
Thread Form
L I.C. in
Y T
TNMB 54 IR 5 API 403 TNMC 55 IR 4 API 382 TNMC 55 IR 4 API 383 TNMC 55 IR 4 API 502 TNMC 55 IR 4 API 503
V-0.040
5
27 5/8 3 27 5/8 2 27 5/8 3 27 5/8 2 27 5/8 3
2.5 6.4 2.8 7.94 2.8 7.94 3.0 7.94 3.0 7.94
V-0.038R 4 V-0.038R 4
V-0.050 V-0.050
4 4
5 1/2 ,7 5/8 , 8 5/8 REG
Vertical inserts to be used with compatible holders on the market
Order example: TNMC 55 IR 4 API 502 BMA
For carbide grade and cutting speed see page A04-2 and 3
A01-37
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