We are professional manufacturer of aluminum alloy wheel rims in China. Our products passed ISO9001:2000 and ISO/TS16949. We can supply products to BMW,BENZ,AUDI directly in the highest quality.
Production Procedure:
1) Casting Machine
Melting & Full Heat Treatment
2) CNC machine
CNC made in Taiwan
Full automatic Painting
Certifications : ISO/TS16949
Bending fatigue testing,
Radial run out testing
Dynamic balance testing.
Air-tightness testing,
Roundness testing
Welcome to visit our factory!
Aluminum Alloy Wheels and Rims Aluminum Alloy Wheels,Aluminum Alloy Wheel Rim,Aluminum Die Casting Wheels And Rims,Aluminum Alloy Wheel And Rim Ningbo WEIBO Molding&Machine Co.,Ltd. , https://www.diecasting-manufacturers.com
Coarse Thread, Black Phosphated Drywall Screw/Sheet Metal Screw
  A selftapping screw is a screw that can tap its own hole as it is driven into it. For hard substrates such as metal or hard plastics, the selftapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas aÂ
regular machine screw cannot tap its own hole in a metal substrate, a selftappig one can (within reasonable limits of substrate hardness and depth). For softer substrates such as wood or soft plastics,the selftapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed).
Like the tip of a nail or gimlet, such a point forms the hole by displacement of the surrounding material rather than any chipforming drilling/cutting/evacuating action.
Products nameCoarse Thread, Black Phosphated Drywall Screw/Sheet Metal Screw
Standard:
DIN,ASTM/ANSI JIS EN ISO,AS,GB
Material
Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L,F593
Steel Grade: DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9;Â SAE: Gr.2,5,8;Â
ASTM: 307A,307B,A325,A394,A490,A449,
Finishing
Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG),Black Oxide,
Geomet,Dacroment,anodization,Nickel plated,Zinc-Nickel plated
Production
ProcessM2-M24:Cold Froging,M24-M100 Hot Forging,
Machining and CNC for Customized fastener
Customized Products
Lead timeBusy season:15-30days,Slack seaon:10-15days
Stock Products
Steel:4.8Grade DIN6923,8.8Grade 10.9Grade of GB5783 and GB5782
Stainless steel: All DIN Standard stainless steel BoltFree Samples for standard fastener For more information visit:www.hainafastener.com
Service
       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 factory directly supply
       Perfect fastening solution with 20 years experiences to solve your problem: Wide range of parts selection.
       Customized Ideal Fasteners: customized services according to the samples and drawings offered.
       If you are not sure about what exactly you need - feel free to contact us anytime and get professional assistance from us.
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3) Painting Line
4) Quality Control
Impact fatigue testing
Advantages
Experienced Staff ; Prompt Delivery; Quality Approvals; Good sales service.