combination screw
1)combination screw 2)with two components assembly 3)with three components assembly Assembly screw type:1. with two components assembly (Assembly screw with flat washer, or teeth washer or elastic washers).2. with three components assembly (Assembly with screw and elastic washer and flat washer)Function of assembly screwThe assembly screw has the characteries of anti-slippery ans anti-loosing.
| Standard: | GB international etc. |
| Head type (HEAD): | BINDING, BUTTON, BRAZIER, FLAT, OVAL, PAN, ROUND, TRUSS, HEX etc. |
| Driver Types (DRIVER): | PHILLIPS, POZIDRIV, SLOTTED, TRIANGLE, SQUARE, HEX, SIX-LOBE, TRI-WING. |
| Thread size range: | 2mm to 12mm. |
| Material: | SWRCH10-SWRCH45, alloy, or low carbon-alloy ( Boron, Manganese and Chrome) Teeth washer: 65Mn SWRCH35, SWRCH45 etc. Washer: SPCC. |
| The mechanic performance refers to standards: | GB/T 3098.1-GB/T 3098.17 |
| Referred standard: | GB/T9074.1-GB/T9074.30 |
combination screw
