HONGQI INSTRUMENT (CHANGXING) CO.,LTD , https://www.hongqi-instrument.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
Model NO.: A490
Application: Machinery, Building
Finish: Black
HS Code: 731815, 731815
MOQ: 900kgs
Trademark: HNF
Transport Package: 20-25kg Carton+900kg/Pallet
Specification: M2-M120, 1/2"-1-1/2"
Origin: China
ASTM A490 A325 DIN933 DIN931 4.8 5.8 8.8 10.9 Grade  Black Oxide Heavy Hex Head Bolts