This spring plunger is in stainless steel. Body in stainless steel X8CrNiS18.9 = 1.4305 (AISI 303), bead in stainless steel X46Cr13 = 1.4034 (AISI 420), polished. Spring in spring stainless steel X10CrNi18.8 = 1.4310 (AISI 302).
During our manufacturing process, spring resistance is controlled by electronic and optical measurement devices.

Spring plunger, strong force
| Spring force | |||||||||
| initial pressure | final pressure | ||||||||
| D | D1 | L | H | N | F1(approx. N) | F2(approx. N) | Reference | |
Pack |
| M5 | 3 | 12 | 0,9 | 0,8 | 19 | 30 | 7036i | 0,9 | 10 pcs |
| M6 | 3,5 | 14 | 1 | 1 | 28 | 40 | 7037i | 1,5 | 10 pcs |
| M8 | 5 | 16 | 1,5 | 1,2 | 47 | 73 | 7038i | 3,5 | 10 pcs |
| M10 | 6 | 19 | 2 | 1,6 | 66 | 100 | 7039i | 7,0 | 10 pcs |
| M12 | 8 | 22 | 2,5 | 2 | 66 | 120 | 7040i | 10,0 | 10 pcs |
| M16 | 10 | 24 | 3,5 | 2,5 | 90 | 180 | 7041i | 24,0 | 10 pcs |
| M20 | 12 | 30 | 4,5 | 2,5 | 115 | 240 | 7042i | 44,3 | 5 pcs |