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screws and fasteners,
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