The end of the screw (English A scream) is sharp as nail. The small cylindrical or conical metal rods have a thread parts with threaded parts.
Screws cant move
Using kerosene or oil, etc., the oil with viscosity lubrication is soaked for a while and then twisted.Or use a small toothbrush to dip the vinegar brush to rust, including the part of the screw and nuts, and then twist it, but be careful. If it is too precise, you cannot use this method.
Screw price
IELTS spot supply 4.8, 8.8 Cross, concave brain, flat brain, hexagonal hexagonal three -in -three -combined screw product price: 0.20 yuan 316 stainless steel cylindrical hexagon screw product price: 1.20 yuan M5 series color zinc combination screw screw product price: 1.20 yuan 1.20 yuan
Screw specification
Among the internal hexagonal products of the M8 series, the GB70-76s international standard specifications are 12.5mm.The international standard specifications of GB70-85 are 13.27mm.The internal hexagonal products of the M10 series, the international standard circle head diameter of the GB70-76 is 15mm, and the international specifications of GB70-85 are 16.27mm.

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