High Precision Machining is defined as a process of changing the dimensions or the performance of workpiece with machining facilities.
According to the temperature of the workpiece while in machining, high precision machining can be divided into cold working and hot working. Usually, machining under indoor temperature, and won't change cause chemical change or phisical phase change is named cold working. On the other hand, if under temperature, higher or lower than room temperature, which will lead to chemical changes or phase changes, it will be called as hot working.
For high precision machining, the machining tolerance can be up to 0.0001-0.001mm, the surface finish Ra can be 0.02-0.1um.
Machining precision is to describe the actual geometrical parameter of the part after machining, such as the size, the form, the position, comparing with the theoretical geometry parameter. The difference from these two parameters is the machining tolerance. The number of the difference show the machining accuracy, the bigger, the lower of the machining precision, the smaller, the higher machining precision.
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Customized Stainless Steel DIN912 Hex Socket Head Cap Bolt Screw
     A bolt is a form of threaded fastener with an external male thread. Bolts are thus closely related to,
and often confused with, screws.
     A hex cap screw is a cap screw with a hexagonal head, designed to be driven by a wrench (spanner).
     An ASME B18.2.1 compliant cap screw has somewhat tighter tolerances than a hex bolt for the head height and the shank length. The nature of the tolerance difference allows an ASME B18.2.1 hex capscrew to always fit where a hex bolt is installed but a hex bolt could be slightly too large to be used where a hex cap screw is designed in.
Products name
Customized Stainless Steel DIN912 Hex Socket Head Cap Bolt 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
Customized Stainless Steel DIN912 Hex Socket Head Cap Bolt Screw
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.