Old and New Watchmaking Threads Reference For Your Benefit

patchwerk · January 28

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'