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

We offer sizes from M2.5 to M10 SEMS screws for wide applications

                                   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