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screws and fasteners,
Custom sandwich panel screws
Hex Washer Head Sandwich Panel Screws Galvanized Steel Tapping Thread ST 5.5
Custom sandwich panel screws are similar with self drilling screws but with longer shaft , it is designed for thick sandwich panel installation .
Sandwich panel screws are made of alloy steel with harden treatment , hex washer head and a plastic ring under head , there are two shaft sections with self tapping threads that set on under head and another section is placed close ends that can secure panels steadily , rest section is shaft . Sandwich panel screws are made by a teck drilling point that is same with roofing screws or teck screws . this design helps sandwich panel screws to cut panels as quickly as possible .
Dimesions for head and point and threads of sandwich panel screws are same as the self drilling screws
|D||ST 2.9||ST 3.5||ST 3.9||ST 4.2||ST 4.8||ST 5.5||ST 6.3|
|Material||Alloy steel||Hardness||450 HV|
Hardness for different sandwich panel screws with different specifications based on standard requests .
|d/ diam||#6||#7||#8||#10||#12||#14 (1/4)|
|Min. case Hardness||600||600||600||600||600||600|
|Core Hardness Hv 0.3||300~400||300~400||300~400||300~400||300~400||300~400|
|Min. Torsional Lb-in||24||24||42||61||92||150|
|Drill point Point #||Nr 2||Nr. 2||Nr. 2||Nr. 3||Nr. 3||Nr. 3|
|Test Plate Thick ness||0.062~0.068||0.062~0.068||0.062~0.068||0.062~0.068||0.062~0.068||0.062~0.068|
Carbon steel sandwich panel screws can be made of or from Stainless steel based on serial 300 , 400 and 200 .
Pull out torque for sandwich panel screws
Installation by screwgun if needed for sandwich panel screws
1 . A screwgun with a depth sensitive nose piece that be used to install drillers ,the screwgun should be a min of 4 amps and a RPM range from 0 to 2500c.
2 . Adjust the screwgun nose piece to properly set the fastener .
3 . Damaged bit tips should be replaced
4 . The fastener is fully setted when the head is flush with the work surface .
5 . The fastener have to penetrate beyond the metal structure a min of 3 picthes of threads
Q.How long I can get samples for approval before placing order ?
A. Normally one week for custom screws , and we can deliver samples within 24 hours for standard screws or stock once received your request .
Q How many days dispatch goods after placed orders ?
A Generally , one week for popular screws under 2 tons , final delivery is subject to requests on screws , packing and or other deamnds from you .
Q.What are your popular payement menthods ?
A. T/T is our prior choose for all , of course , we are also accept L/C , Westunion , paypall .
Q. What products you produce ?
A. We manufacture various hardwares like fasteners screws , nuts , bolts , pins , rivets and custom metal stamping parts and plastic injeciton molding products .
Contact Person: MR.LIN