A screw, or bolt, is a type of fastener, typically made of metal, and characterized by a helical ridge, known as a male thread (external thread) or just thread, wrapped around a cylinder. Some screw threads are designed to mate with a complementary thread, known as a female thread (internal thread), often in the form of a nut or an object that has the internal thread formed into it. Other screw threads are designed to cut a helical groove in a softer material as the screw is inserted. The most common
uses of Screws are to hold objects together and to position objects.A screw will almost always have a head on one end which contains a specially formed shape that allows it to be turned, or driven, with a tool. Common tools for driving screws include screwdrivers and wrenches. The head is usually larger than the body of the screw, which keeps the screw from being driven deeper than the length of the screw and to provide a bearing surface. There are exceptions; for instance, carriage Bolts have a domed head that is not designed to be driven; set screws often have a head smaller than the outer diameter of the screw; J-bolts have a J-shaped head which is not designed to be driven, but rather is usually sunk into concrete allowing it to be used as an Anchor Bolt. The cylindrical portion of the screw from the underside of the head to the tip is known as the shank; it may be fully threaded or partially threaded.
Stainless steel square slotted round head self tapping/self drilling screw
Stainless steel: All DIN ,GB Standard and part ASNI standard stainless Steel Screws, Example: ISO7380,DIN7981,DIN7982,DIN916,DIN913,DIN7985,DIN912
Free Samples for standard fastener
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Professional Manufacturer: All of our Fastener are designed and manufactured according to buyers’ specification and performance.
Quality is guaranteed: Durability testing and critical technical design to enhance fasteners lifetime.
Cost effective: Competitive prices with professional factory supply
Perfect fastening solution with 10 years experiences to solve your problem: Wide range of parts selection.
Customized Ideal Fasteners: customized services according to the samples and drawings offered.
1.How do you let me trust you.
We have own import & export right, and we are Gold mumber of alibaba and made in china, We get credit guarantee from Alibaba Group. you can make an order by alibaba to us directly.
2.How about your price.
High quality products with reasonable price. Please give me a inquire, I will quoted you a price for you refer at once.
3. How do you control your quality.
We request QC inspect every productions links for each bacth goods.And we can provide you MTC and mill certificate when the goods is finished.
4.Could you provide free samples?
For new customer, We can provide free samples for standard fastener, But the clients will pay the express charges. For old customer,We will send you free samples and pay express charges by ourself.
5.Do you accept small order?
Sure, we can accept any orders, we keep lots of stock for ALL STAINLESS STEEL FASTENER, CARBON STEEL NUT AND PART BOLT,Like hex weld nut, cage nut, Wing Nut, square weld nut,Cap Nut, Hex Nut ,Flange Nut.Metric 8.8Grade,10.9Grade 12.9Grade Hex Bolt and Hex Socket cap screw,Part ASME Hex cap screw.
6.How about your delivery time
General speaking, if the goods is in stock, we can delivery them with 2-5days, If the quantity is 1-2container, we can give you with 18-25days,if the quantity is more than 2 container and you are very urgent, we can let factory priority produce your goods.
7.What is your packing.
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallets is about 900-960kg, We also can make customer’s logo on the cartons. Or we customized cartons according to customers’ requestment
8.What is your payment term
We can accept T/T,LC for general order ,Paypal and Western union for small order or samples order.
Contact us if you need more details on Round Head Self Tapping Screw. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Square Slotted Round Head Screw、Stainless Steel Square Head Screw. If these products fail to match your need, please contact us and we would like to provide relevant information.