VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
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Phillips Slot Pan Head Stainless Steel SEMS Screws M5 Assemblied Captive Square Washer
SEMS screw is made from stainles steel with high tensile strength , a captive square washer assembled to machine screws to enlarge touching area and increase friction for more tighten secure .
Normally , SEMS Screws are comprised of a screw and a washer even more parts like double washers to enable screws to fasten pieces more steadily . Washer for SEMS screws maybe a spring washer or flat washer or both washers some times , and square washer with grooves on the surface also can be used to it .
Various washers for SEMS Screws
Usually , the head style must to be kept flat under the head for the SEMS Screws so that screw to fasten washers on the surface more tightly .
Specification
| A | 9.5 |
| B | 12 |
| H | 3.8 |
| D | M5 |
| D1 | 1.5 |
| L | 12 |
We offer sizes from M2.5 to M10 SEMS screws for wide applications
| Diameter | Length | ||||||||||||||
| M2.5 | 5 | 8 | 10 | ||||||||||||
| M3 | 8 | 10 | 12 | 15 | 18 | ||||||||||
| (M3.5) | 8 | 10 | 12 | 15 | 18 | 19 | 20 | 25 | |||||||
| M4 | 8 | 10 | 12 | 15 | 18 | 19 | 20 | 25 | 30 | ||||||
| M5 | 10 | 12 | 15 | 18 | 19 | 20 | 25 | 30 | 32 | 35 | |||||
| M6 | 10 | 12 | 15 | 18 | 19 | 20 | 25 | 30 | 32 | 35 | 42 | ||||
| M8 | 15 | 18 | 19 | 20 | 25 | 30 | 32 | 35 | 42 | 51 | 60 | ||||
| M10 | 18 | 19 | 20 | 25 | 30 | 32 | 35 | 42 | 51 | 60 | |||||
Washers for SEMS screws are different for different sizes .
Finishing for SEMS screws
Zinc
The most popular plating for the most products , making parts are bright and smooth and resistant corrosion
Nickel
The film thickness is 1～3μm , it improves brightness and wear resistance . it is for the most items .
Polishing
Reduce roughness of parts and improve brightness . is workable for the most metal parts in industry .
Tin
With film thickness 0.13～1.27μm , tin finish with bright surface and good ductility ,corrosion resistance ,lower melting point ,eco-friendly features . and is used for electronics .
Brass
Usually, 5gm～8gm finish coating thickness and with good dispersibility ,Bright appearance .
Dacromet
This finish is grey color with High corrosion resistance , No hydrogen embrittlement ,Heat resistance ,Easy to plated more ,eco-friendly etc
Chrome
Chrome finish is silver white color and the thickness of film is 0．25～0．5μm normally . chrome finish has many practical Features like Bright appearance ,Wear resistance ,Corrosion resistance ,Hard plating film ,Heat resistance .
SEMS Screws Materials
We choose the best material for SEMS screws to ensure the quality .
Stainless steel : SUS 201 , SUS303 , SUS 304 ,SUS 316 , SUS 416 ,SUS 430 and SUS 420 .
Carbon steel : 1008 , 1010 , 1018 , 1022 , 1035 , 1045 , SCM 435 and 40CRO
Aluminum : 2024 , 6061 and 7075
Brass : CuZn35 , CuZn37 , CuZn40 , CuZn37Pb1 and CuZn39Pb1
SEMS Screws features
1 , Quick and easy operation
2 , Recyclable
3 , Long Service
4 , Environmental protection
5 , Standard Sizes
Applications
SEMS Screws is mainly used for electronic products as tony ,printer , robot and computer etc .
Our promise
※ Top quality with cheap price
※ Quick deliver
※ All Screws are eco-friendly
※ MOQ is accepted
※ Perfect sales-after service