A563 Heavy Hex Nuts Dh with Blue Wax
Product:Heavy hex nuts
Standard: ASTM A563 GR.DH
Raw material: 45K
Surface: H.D.G with blue wax
Specification Range:M12-M36
Property Class:DH
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Product Introduction
Product:Heavy hex nuts
Standard: ASTM A563 GR.DH
Raw material: 45K
Surface: H.D.G with blue wax
Specification Range:M12-M36
Property Class:DH
Mechanical Properties
Advantages and Applications of A563 DH Heavy Hex Nuts with Blue Wax Coating
A563 DH heavy hex nuts (hot-dip galvanized + blue wax coating) are high-strength, high-corrosion-resistant, easy-to-install structural fasteners. Their core advantages are high strength + long-lasting corrosion protection + smooth installation + easy on-site identification, mainly used in heavy steel structures, bridges, infrastructure, anchor bolts, industrial heavy-duty and other critical connection scenarios.
Core Advantages of A563 DH Heavy Hex Nuts with Blue Wax
High Strength & Structural Reliability (DH Grade)
•Material & Heat Treatment: Made from quenched and tempered medium carbon steel, meeting the ASTM A563 Grade DH high-strength standard, with tensile and proof loads far exceeding ordinary nuts.
•Heavy Hex Design: Larger width across flats and height, providing a larger bearing surface and stronger torsion resistance, suitable for high torque and heavy loads to reduce stress concentration.
•Coarse Thread: Deep engagement, stronger shear and pull-out resistance, matching high-strength structural bolts such as A325 and A490.
Three Values of Blue Wax Coating (Hot-Dip Galvanizing + Wax + Blue Dye)
•Long-Lasting Corrosion Protection (Hot-Dip Galvanizing): Thick zinc layer ensures long rust-proof service life in outdoor, humid or corrosive environments (coastal, industrial, underground).
•Smooth Installation (Wax Layer): Lubricates threads, reduces friction, prevents galling, and stabilizes torque, improving assembly efficiency.
• Easy On-Site Identification (Blue Dye): Blue marking allows quick differentiation between DH grade and other specifications, reducing misinstallation and facilitating quality inspection.
Comprehensive Performance Advantages
•Consistent Torque-Tension Relationship: The wax layer enables more accurate preload control and higher connection reliability.
•Strong Compatibility: Perfectly matches high-strength bolts/threaded rods such as A325, A490, B7, and A307 Grade B.
• Compliance: Conforms to ASTM A563, AISC, IFI and other structural specifications, suitable for critical engineering projects.
Main Sales Markets of the Product:
Europe
Packaging and Logistics
Main packaging materials include: small bags, small boxes, cartons, pallets and iron drums.
Customized packaging is available according to customer requirements.
Flexible bulk ordering plans are provided, and both transportation terms and delivery schedules are negotiable.
Certification and Warranty
We are certified by ISO9001:2015, IATF16949:2016, and other international quality standard certifications.
Long-term quality warranty and comprehensive after-sales service are provided.
Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide
Our factory & quipment
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