Size of graphite electrode thread

Diam of eletrode

 Size of nipple 

  Size of socket(mm)

 Thread pitch

mm

in

D

L

a₂

I

a₁

H

mm

100

4

69.85

-0.5

101.6

-1.0

40.3

-3.0

6

63.53

+0.5

53.80

0~+7

6.35

150

6

92.08

139.7

56.2

85.76

72.85

200

8

122.24

177.8

80.0

115.92

91.90

250

10

152.40

190.5

108.0

146.08

101.30

300

12

177.80

215.9

129.2

171.48

114.00

350

14

203.20

254.0

148.2

196.88

133.00

400

16

222.25

304.8

158.8

215.93

158.40

450

18

241.30

304.8

177.9

234.98

158.40

500

20

269.88

355.6

198.0

263.56

183.40

550

22

298.45

355.60

228.06

292.13

183.80

600

24

317.50

355.60

247.11

311.18

183.80

250

10

155.58

-0.5

220.1

-1.0

103.8

-3.0

10

147.14

+0.5

113.05

0~+7

8.47

300

12

177.17

270.9

116.9

168.73

138.45

350

14

215.90

304.8

150.0

207.47

155.40

400

16

241.30

338.6

169.8

232.87

172.30

450

18

273.05

355.6

198.7

264.62

180.80

500

20

298.45

372.5

221.3

290.02

189.25

550

22

298.45

457.20

211.12

292.13

234.60

600

24

317.50

457.20

230.17

311.18

234.60