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BSPP JIS port fittings tightening torque specs

Mar 27, 2020

BSPP  ports including ISO 1179-1 BSPP flat face seal and BS 5380 BSP O-ring boss.

JIS B2351 port is similar to BS 5380.

 

BSPP

thread

 

JIS

thread

Torque  into aluminium  body (Nm)

Torque  into ferrous body (Nm)

G1/8"

PF 1/8"

18 - 20

18 - 20

G1/4"

PF 1/4"

31 - 37

31 - 37

G3/8"

PF 3/8"

45 - 50

70 - 80

G1/2"

PF 1/2"

65 - 71

100 - 110

G 5/8”

PF 5/8”

75 - 80

120 - 130

G3/4"

PF 3/4"

95 - 108

180 - 190

G1"

PF 1"

158 - 169

200 - 210

G1-1/4"

PF 1-1/4"

197 - 210

300 - 315

G1-1/2"

PF 1-1/2"

220 - 235

300 - 315


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