A bolt is a form of threaded fastener with an external male thread. Bolts are thus closely related to, and often confusedwith, screws. The Carbon Steel ASTM A325 HDG Heavy Hex Head Structural Bolt and Nut is a specialized type of fastener designed for structural applications that demand high strength and reliability. Compliant with ASTM A325 standards, these bolts feature a heavy hex head design, providing a larger bearing surface and better wrenching for ease of installation. The bolts are made from carbon steel and are treated with a hot-dip galvanized (HDG) finish, enhancing their resistance to corrosion, especially in outdoor and harsh environmental conditions. Paired with accompanying nuts, these structural bolts are specifically engineered for use in critical structural connections, such as in steel-framed buildings, bridges, and other heavy construction projects. They provide high tensile and shear strength, contributing to the overall stability and safety of the structures.
The ASTM A325 HDG Heavy Hex Head Structural Bolt and Nut combination is chosen for its reliability, strength, and corrosion resistance, ensuring secure connections and structural integrity in critical load-bearing applications.
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.
1:Metric Hex BOLT:GB/T 3098.1-2010,ISO898.1-2009 | ||||||||||
CLASS | 4.6;4.8 | 5.8 | 6.8 | 8.8 | 9.8 | 10.9 | 12.9 | |||
SIZE | ALL SIZE | ≦M12 | >M12 | ≦M8 | >M8 | ALL SIZE | ||||
COMMON MATERIALS | 1008 ~ 1015 | 1012 ~1017 | 10B21 / 1022 | 10B21 | 10B33 | 10B21 | 10B33 | 10B33 / SCM435/ML20MnTiB | SCM435 | |
ML08AL SWRCH8A~ SWRCH15A | SWRCH15A~ SWRCH18A | SWRCH22A | 35K |
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35ACR | 10B35 |
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AISI 4140 | ||
HEAT TREATMENT(YES/NO) | NO | YES | ||||||||
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2:ASME Hex BOLT:SAE J429 | ||||||||||
CLASS | G1 | G2 | G5 | G5.2 | G8 | SK |
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SIZE | ALL SIZE | ≦3/8 | >3/8 | ALL SIZE |
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COMMON MATERIALS | 1008 ~ 1015 ML08AL SWRCH8A~ SWRCH15A | 1017 | C(0.28~0.55) 10B33 or MEDIUM CARBON STEEL | C(0.15~0.25) or 10B21 | 10B33 or SCM435 | SCM435 |
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HEAT TREATMENT(YES/NO) | NO | YES |
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Product Name |
Carbon Steel ASTM A325 HDG Heavy Hex Head Structural Bolt And Nut |
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Standard: | DIN,ASTM/ANSI JIS EN ISO,AS,GB | ||||||
Material | Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L | ||||||
Stainless Steel 304 316 316L GrB8 B8M. Carbon Steel | |||||||
Finishing |
Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG) phosphorization, Black Oxide,Geomet,Dacroment,anodization,Nickel plated,Zinc-Nickel plated |
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Customized Products Lead time |
Busy season:15-25days,Slack seaon:10-15days | ||||||
Stock Products |
stainless steel screws, Example: ISO7380,DIN7981,DIN7982,DIN916,DIN913,DIN7985,DIN912 |
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Get Free Samples for standard fastener from Gangtong Zheli Fastener | |||||||
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Environmental protection equipment, medical equipment, communications equipment, electric power facilities, electronic products, food machinery, petrochemical industry, ship assembly, pump valve, pipe, building curtain wall, Buildings, machanical equipments, bridges, tunnels, high speed railways etc