Slotted screws, that is, the groove type is a slot. This type of groove type requires one less milling process than the commonly used Phillips screws, and the cost is slightly lower than that of the cross recessed groove. Slotted head screws include slotted machine screws, slotted self tapping screws,slotted wood screws.Screw heads can be the pan head, countersunk head,round head etc
The material requirements include iron and stainless steel, iron has low, medium, and high carbon steel, and the material of slotted screws includes stainless steel 201, stainless steel 304 and stainless steel 316, etc. The thread tolerance is 6G, and the mechanical performance grades of carbon steel slotted pan head screws are 4.8 and 8.8. The 4.8 combined screw is ordinary steel, and the allowable maximum hardness is 255HV. The 8.8 slotted pan head screw is generally used The wire rod 10B21 is punched out, and then hardened, and hydrogen is removed after hardening. Dehydrogenation is to prevent hydrogen embrittlement of spring washers in composite screws.
To prevent the spring washer from breaking, the tolerance grade of the combined screw is A. The cross recess is H-shaped. The surface treatment of slotted pan head screws includes blue zinc, colored zinc, black zinc, white nickel and so on. The technical requirement of the combination screw for the elastic flat washer is that the washer should be able to rotate automatically without falling off.
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As a 20-year industry experience manufacturer with a factory equipped with precision machines, we can provide, from consultation to production, a one-stop solution for you. For an accurate quotation, you need to tell us the following information:
Please tell us the specific details, like what is material and finish do you, and the fastener size, if you have drawings or pictures, please send them to us
Normally small order quantities are acceptable, while large quantities can help us to lower the cost and get you a more competitive price.
Tell us your application or detailed information for your projects. We can offer you the best choice, meanwhile, our engineers can give you more suggestions under your budget.
What We Can Offer You..
We have rich experience in the manufacture, design, and application of custom fasteners, and served more than 10000 customers worldwide
we have an absolute advantage in the cost of raw materials. Under the same quality, our price is generally 10%-30% lower than the market.
With more than 22 years, we already have completed the control system and test equipment, we can provide all tests you need
Any feedback will be replied to within 24hours, We provide a 3-5 years guarantees policy. And all costs by us will be on our account.
If you need urgently, we can deliver samples within 8hours. Bulk order can be within one week
Why Choice us
2. Finish surface treatment-ROHS Compliance
-Stringent salt spray testing and environmental testing, rust-free
-Stainless steel salt spray test reach 1000 hours.
3. Systematic Quality Control,100% Optimal product
-Sclerometer+Salt Spray test machine+Dynamometer
-QC+Screening Machine+Optical detection machine
4. Mass Stock, The 24hours delivery
-More than 10000 kinds of screws are in stock
-Samples can be made and sent out within 24 hours
5. Custom made service
-We bring your drawing design to reality
-100%non-defective and friendly environmental compliant
-SGS,ISO 9001,ROHS,IATF 16949
Shenzhen Heat Hardware Co., Ltd is a leading custom screw manufacturer in China founded in 2000 years. We are specializing in custom screws, security screws, Sems screws, Chicago Screws, Weld Screws, Long screws, Micro Screws, Thumb Screws, Set Screws, Custom bolts, carriage bolts, nuts, and other custom Fasteners. With more than 20years of industry experience. We have serviced over 20000customers including the aerospace industry, automotive industry, electronics, mechanical and electrical products, robots, the Medical industry, communications industry, Outdoor sports products, smart appliances, etc. we can provide one-stop fastener customized service for you no matter what kind of custom fastener you need.
We have a variety of production requirements of equipment, can meet any customized demands. can provide comprehensive fastener solutions. Anything you need can make by Heatscrew.
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