NAME : G10 Pin for transformer coils supporter  / G10 bolts , G10 nuts G10  Glass- fiber Reinforced Epoxy square nuts  BOLTS/FR4 BOLTS /INSULATION BOLTS


The most versatile all-around laminate grades are continuous glass woven fabric impregnated with an epoxy resin binder. Epoxy resins are among the most versatile and widely used plastics in the electronics field, primarily because water absorption is virtually nil, rendering it an outstanding insulator


Size:  please ask for us.

COLOUR :GREEN /yellow /light green


A square nut is a four sided nut. Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening as well as greater resistance to tightening. Fiberglass reinforced plastics are very strong and corrosion resistant.

Also can used as insulating part in machinery and electrical instruments, it also can be used as pressure ,usually used in the transformer generator motor and others

Size : according to customer design


Epoxy laminated glass-fiber specification


Heat Resistance B Standard Q/DJ10-731-2000
Density ≥1.65g/cm3
Hydroscopicity < 0.60 MPA

Volume Resistively

Under normal ≥1.0×1010  Ω.cm
After immersion 24h ≥1.0×108Ω.cm

Insulation Resistance

Under normal ≥1.0×1010Ω
After immersion 24h ≥1.0×107Ω

Proof Voltage at perpendicular to lamination

(transformer oil at 90±

degree  for 5 min)









Heat stability (150 degree ,/24 H ) No crack or plump up