Zhejiang Fengfan NC Machinery Co., Ltd. , https://www.ffknittingmachine.com
A bolt is a form of threaded fastener with an external male thread. Bolts are thus closely related to, and often confused with, screws.Â
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 cap screw 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.
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Products name
Bolts(Hex bolt,Heavy hex bolt,Flange bolt,Carriage bolt,Guardrail Bolt)
Standard:
DIN,ASTM/ANSIÂ JISÂ ENÂ 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;  SAE: Gr.2,5,8;  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
ProductionÂ
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 
Stainless Steel A2-70 DIN6921 with Serrated Hex Flange Bolt
A bolt is a form of threaded fastener with an external male thread. Bolts are thus closely related to, and often confused with, screws.Â
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 cap screw 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.
Â
Products name
Bolts(Hex bolt,Heavy hex bolt,Flange bolt,Carriage bolt,Guardrail Bolt)
Standard:
DIN,ASTM/ANSIÂ JISÂ ENÂ 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;  SAE: Gr.2,5,8;  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
ProductionÂ
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
Stainless Steel A2-70 DIN6921 with Serrated Hex Flange Bolt
Model NO.: DIN6921
Application: Machinery, Chemical Industry, Environmental, Building
Finish: Passivation
HS Code: 731815, 731815
MOQ: 1000PCS
Trademark: HNF
Transport Package: 20-25kg Carton+900kg/Pallet
Specification: M5-M20
Origin: China
Model NO.: DIN6921
Application: Machinery, Chemical Industry, Environmental, Building
Finish: Passivation
HS Code: 731815, 731815
MOQ: 1000PCS
Trademark: HNF
Transport Package: 20-25kg Carton+900kg/Pallet
Specification: M5-M20
Origin: China
Stainless Steel A2-70 DIN6921 with Serrated Hex Flange Bolt