Spring Washer Flat Washer SEMS Screws
Application
SEMS screws are a screw and washer assembly that include spring washers or flat washers. These screws are often used in electrical equipment, household appliances, office facilities, communication equipment and other mechanical equipment.
Function
The spring washers have a loosening protection function, as they increase contact with the area to be attached to, thus preventing breakage of the mounting surfaces. SEMS screws give machinery additional strength.
Customization parts
1. Manufacturing standard: ZONFA satisfies the GB, ISO, DIN, ANSA, BS and JIS standards.
2. Material: copper, iron, stainless steel, carbon steel, alloy steel and so on.
3. Common washer material: 50# steel, 65Mn, 60# steel, 45#steel, stainless steel and so on.
4. Head type: wafer head, pan head, cheese head, flat head, button head, hex head.
5. Recess type: cross recess, slot recess, Phillips slotted combination recess, 6 lobe recess, slotted 6 lobe recess, tamperproof 6 lobe recess, pozi recess, hex recess, torx recess
6. Diameter range: M3-M8.
Assembly: screws, flat washers, spring washers
Material: stainless steel
Standard：DIN912 C/W DIN6904 DIN6905
Size: M2-M8
Product level: 4.8, 8.8, 10.9, 12.9 and so on
Surface treatment: galvanization
Assembly: screws, flat washers, spring washers
Material: stainless steel
Standard: DIN7985 C/W SPRING DIN6902A
Size: M2-M8
Product level: 4.8, 8.8, 10.9, 12.9 and so on
Surface treatment: galvanization
Assembly: screws, flat washers, spring washers
Material: brass
Type：cheese head 6 lobe recess screw
Standard: DIN912 C/W DIN6904 DIN6905
Size: M2-M8
Product level: 8.8, 10.9
Surface treatment: color zinc-plated
Assembly: screws, flat washers
Material: brass
Standard: DIN933 C/W
Size: M2-M8
Product level: 8.8. 10.9
Surface treatment: color zinc-plated
Assembly: screws, flat washers
Material: brass
Type: hex head SEMS screw
standard: CHEESE TORX
Size: M2-M8
Product level : 8.8, 10.9
Surface treatment: color zinc-plated
We can provide custom screws according to customer requirements for head types, dimensions, hardness and materials. Please contact us for more information.
