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Old and New Watchmaking Threads Reference For Your Benefit

patchwerk
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patchwerk

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I thought it might be useful to share this reference of watchmaking threads. It includes the modern threads you would get from Bergeon/Wiru/Horotec sets as well as from the old mysterious thread plates labeled Martin Fils/Perrelet/Latard/Bourgeaux

All values in mm.

0.30x0.075        no.1 Bergeon tap,  drill 0.24mm
0.35x0.075        no.2 Bergeon tap,  drill 0.28mm
0.40x0.100        no.3 Bergeon tap,  drill 0.32mm; 
0.45x0.100        no.4 Bergeon tap,  drill 0.37mm; 
0.50x0.125        no.5 Bergeon tap,  drill 0.40mm; 
0.55x0.125        no.6 Bergeon tap,  drill 0.45mm; 
0.60x0.150        no.7 Bergeon tap,  drill 0.48mm; 
0.65x0.150        no.8 Bergeon tap,  drill 0.53mm; 
0.70x0.175        no.9 Bergeon tap,  drill 0.56mm; 
0.75x0.175        no.10 Bergeon tap,  drill 0.61mm; 
0.80x0.200        no.11 Bergeon tap,  drill 0.64mm; 
0.85x0.200        no.12 Bergeon tap,  drill 0.69mm;
0.90x0.225        no.13 Bergeon tap,  drill 0.72mm; 
0.95x0.225        no.14 Bergeon tap,  drill 0.77mm; 
1.00x0.250        no.15 Bergeon tap,  drill 0.80mm; 
1.05x0.250        no.16 Bergeon tap,  drill 0.85mm; 
1.10x0.250        no.17 Bergeon tap,  drill 0.90mm; 
1.20x0.250        no.18 Bergeon tap,  drill 1.00mm; 
1.30x0.300        no.19 Bergeon tap,  drill 1.06mm; 
1.40x0.300        no.20 Bergeon tap,  drill 1.16mm; 
1.50x0.350        no.21 Bergeon tap,  drill 1.26mm
1.60x0.350        no.22 Bergeon tap,  drill 1.32mm; 
1.70x0.350        no.23 Bergeon tap,  drill 1.42mm; 
1.80x0.350        no.24 Bergeon tap,  drill 1.52mm; 
2.00x0.400        no.25 Bergeon tap,  drill 1.68mm; 
2.2x0.45         
2.3x0.40         in Wiru No.1 tap/die set, 
2.6x0.45         in Wiru No.1 tap/die set, 
3.0x0.50         in Wiru No.1 tap/die set,  

0.213x0.086       Bourgeaux thread no.24, on Martin Fils/Perrelet et Martin 'B' 
0.267x0.088       Bourgeaux thread no.23, on Martin Fils/Perrelet et Martin 'B' 
0.291x0.091       Bourgeaux thread no.22, on Martin Fils/Perrelet et Martin 'B' 
0.312x0.093       Bourgeaux thread no.21, on Martin Fils/Perrelet et Martin 'B' 
0.344x0.094       Bourgeaux thread no.20, on Martin Fils/Perrelet et Martin 'B' 
0.376x0.096       Bourgeaux thread no.19, on Martin Fils/Perrelet et Martin 'B' 
0.414x0.101       Bourgeaux thread no.18, on Martin Fils/Perrelet et Martin 'B' 
0.452x0.111       Bourgeaux thread no.17, on Martin Fils/Perrelet et Martin 'B' 
0.496x0.120       Bourgeaux thread no.16, on Martin Fils/Perrelet et Martin 'B' 
0.563x0.133       Bourgeaux thread no.15, on Martin Fils/Perrelet et Martin 'B' 
0.640x0.150       Bourgeaux thread no.14, on Martin Fils/Perrelet et Martin 'B' 
0.713x0.159       Bourgeaux thread no.13, on Martin Fils/Perrelet et Martin 'B' 
0.782x0.167       Bourgeaux thread no.12, on Martin Fils/Perrelet et Martin 'B' 
0.858x0.181       Bourgeaux thread no.11, on Martin Fils/Perrelet et Martin 'B' 
0.936x0.200       Bourgeaux thread no.10, on Martin Fils/Perrelet et Martin 'B' 
1.008x0.219       Bourgeaux thread no.9, on Martin Fils/Perrelet et Martin 'B' 
1.097x0.239       Bourgeaux thread no.8, on Martin Fils/Perrelet et Martin 'B' 
1.203x0.261       Bourgeaux thread no.7, on Martin Fils/Perrelet et Martin 'B' 
1.299x0.271       Bourgeaux thread no.6, on Martin Fils/Perrelet et Martin 'B' 
1.404x0.274       Bourgeaux thread no.5, on Martin Fils/Perrelet et Martin 'B' 
1.523x0.289       Bourgeaux thread no.4, on Martin Fils/Perrelet et Martin 'B' 
1.641x0.298       Bourgeaux thread no.3, on Martin Fils/Perrelet et Martin 'B' 
1.797x0.320       Bourgeaux thread no.2, on Martin Fils/Perrelet et Martin 'B' 
1.984x0.359       Bourgeaux thread no.1, on Martin Fils/Perrelet et Martin 'B' 
2.169x0.388       Bourgeaux thread no.0, on Martin Fils/Perrelet et Martin 'B' 
2.363x0.420       Bourgeaux thread no.00, on Martin Fils/Perrelet et Martin 'B' 

0.367x0.087       Latard thread no.20, on Martin Fils/Perrelet et Martin 'L' 
0.395x0.094       Latard thread no.19, on Martin Fils/Perrelet et Martin 'L' 
0.432x0.102       Latard thread no.18, on Martin Fils/Perrelet et Martin 'L' 
0.479x0.109       Latard thread no.17, on Martin Fils/Perrelet et Martin 'L' 
0.529x0.115       Latard thread no.16, on Martin Fils/Perrelet et Martin 'L' 
0.591x0.126       Latard thread no.15, on Martin Fils/Perrelet et Martin 'L' 
0.665x0.138       Latard thread no.14, on Martin Fils/Perrelet et Martin 'L' 
0.736x0.149       Latard thread no.13, on Martin Fils/Perrelet et Martin 'L' 
0.798x0.164       Latard thread no.12, on Martin Fils/Perrelet et Martin 'L' 
0.870x0.180       Latard thread no.11, on Martin Fils/Perrelet et Martin 'L' 
0.956x0.196       Latard thread no.10, on Martin Fils/Perrelet et Martin 'L' 
1.036x0.209       Latard thread no.9, on Martin Fils/Perrelet et Martin 'L' 
1.106x0.219       Latard thread no.8, on Martin Fils/Perrelet et Martin 'L' 
1.181x0.233       Latard thread no.7, on Martin Fils/Perrelet et Martin 'L' 
1.269x0.246       Latard thread no.6, on Martin Fils/Perrelet et Martin 'L' 
1.363x0.262       Latard thread no.5, on Martin Fils/Perrelet et Martin 'L' 
1.464x0.284       Latard thread no.4, on Martin Fils/Perrelet et Martin 'L' 
1.568x0.304       Latard thread no.3, on Martin Fils/Perrelet et Martin 'L' 
1.703x0.325       Latard thread no.2, on Martin Fils/Perrelet et Martin 'L' 
1.869x0.342       Latard thread no.1, on Martin Fils/Perrelet et Martin 'L' 
2.029x0.352       Latard thread no.0, on Martin Fils/Perrelet et Martin 'L' 

I extracted these from https://www.improwis.com/tables/threads2.webt

 

Edited by patchwerk
link fix
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