This kind of spring washer is standard parts. It is made according to the DIN127B, , we can produce from the size M2-M42, the material can be stainless lteel, steel or copper. 1. Material: Mn65, carbon steel 2. Standard: GB861-82, GB862-86 3. Specification: 2-20 mm 4. Finish: Oxidation, bluing 5. Hardness: HRC42-48 6. Certification: ISO/TS16949 7. OEM, ODM is acceptable. 8. Comply RoHS and REACH Regulation.Thread Major Dia. 2 2.5 3 4 5 6 8 10 12 14 16 18 20 d Max 2.45 2.95 3.5 4.6 5.6 6.76 8.76 10.93 12.93 14.93 16.93 19.52 21.52 Min 2.2 2.7 3.2 4.3 5.3 6.4 8.4 10.5 12.5 14.5 16.5 19 21 D Max 4.5 5.5 6 8 10 11 15 18 20.5 24 26 30 33 Min 4.2 5.2 5.7 7.64 9.64 10.57 14.57 17.57 19.98 23.48 25.48 29.48 32.38 S 0.3 0.4 0.5 0.6 0.8 1 1.2 1.5 Teeth Min. 6 8 9 10 12 Technical terms:Material: Mn65, Heat treatment: HRC40-50, Surface is to be oxidation
