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Standard Sizes and Weights of Nipples

Standard Sizes and Weights of Nipples

Standard Sizes and Weights of Nipples When ordering, please specify the type of nipple required by nominating "Designation of Required Nipples"

a.3TPI Tapered Nipples and Sockets

Designation Nominal Diameter of electrode Nipple Depth of Socket(C)
(Minimum)
Pitch of Thread(P) Average Weight of Nipple Industrial Standards
Dia.(A)
(Maximum)
Length(L)
(Maximum)
mm mm mm mm mm kg
14T3 350 215.90 304.80 158.40 8.467 14.8 JIS IEC NEMA
14T3 400 215.90 304.80 158.40 8.467 14.8 JIS IEC NEMA
16T3 400 241.30 338.70 175.30 8.467 20.8 JIS IEC NEMA
16T3L 400 241.30 355.60 183.80 8.467 21.2 - - NEMA
16T3 450 241.30 338.70 175.30 8.467 20.8 JIS IEC -
18T3 450 273.05 355.60 183.80 8.467 28.4 JIS IEC -
18T3 500 273.05 355.60 183.80 8.467 28.4 JIS IEC -
18T3L 500 273.05 457.20 234.60 8.467 34.5 - - NEMA
20T3 500 298.45 372.50 192.20 8.467 36.7 JIS IEC NEMA
20T3 550 298.45 372.50 192.20 8.467 36.7 JIS IEC NEMA

JIS:Japanese Industrial Standard IEC:International Electrical Commission

NEMA:National Electrical Manufactures Association

b.4TPI Tapered Nipples and Sockets

Designation Nominal Diameter of electrode Nipple Depth of Socket(C)
(Minimum)
Pitch of Thread(P) Average Weight of Nipple Industrial Standards
Dia.(A)
(Maximum)
Length(L)
(Maximum)
mm mm mm mm mm kg
14T4 350 203.20 254.00 133.00 6.350 11.5 JIS - -
16T4 400 222.25 304.80 158.40 6.350 14.7 JIS - -
16T4L 400 222.25 355.60 183.80 6.350 18.1 - IEC -
18T4 450 241.30 304.80 158.40 6.350 19.4 JIS IEC -
20T4 500 269.88 355.60 183.80 6.350 27.9 JIS IEC NEMA
20T4L 500 269.88 457.20 234.60 6.350 33.8 - IEC NEMA
22T4 550 298.45 355.60 183.80 6.350 35.7 JIS IEC -
22T4L 550 298.45 457.20 234.60 6.350 43.4 JIS IEC -
24T4 600 317.50 355.60 183.80 6.350 40.6 JIS IEC NEMA
24T4L 600 317.50 457.20 234.60 6.350 48.4 - IEC NEMA
26T4L 650 355.60 558.80 285.40 6.350 75.0 - IEC -
28T4L 700 374.65 558.80 285.40 6.350 84.3 - IEC -
30T4L 750 406.40 609.60 310.80 6.350 108.0 - IEC -
32T4L 800 431.80 635.00 323.50 6.350 128.0 - - -

Note:NEMA Standard is not equal to JIS/IEC Standards, but NEMA is included in JIS/IEC Standards with regard to the tolerance.

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