DIN 933 A4-80 Stainless Steel Hex Bolt Marine Grade Corrosion-Resistant Anti-Seize Thread Locking Hex Bolt

توضیحات

What Are Hex Bolts?

Hex bolts, also known as hexagon head bolts or hex cap screws, are fasteners with a six-sided hexagonal head designed for turning with a wrench . They feature machine threads for use with a nut or in a tapped hole, providing strong, secure connections between components . Hex bolts are available in fully threaded or partially threaded configurations, with the unthreaded shank portion offering additional shear strength.

Materials

• Carbon Steel (Grades: Low carbon, Medium carbon; Strength classes: 4.8, 5.8, 8.8)

• Stainless Steel (A2-70, A4-80; Grades: SUS304, SUS316)

• Alloy Steel (SCM, 35/40铬钼, SCM435; Strength classes: 10.9, 12.9)

• Brass (H62, H65, H68)

• Aluminum / Titanium

Surface Finishes

• Plain (No finish)

• Zinc Plated (Electroplated, Chromate plating, Trivalent White/Black)

• Hot-Dip Galvanized (HDG)

• Black Oxide Coating

• Nickel Plating (Electroless Nickel, Bright Nickel)

• Chrome Plating

• Dacromet / Geomet Coated

• Parkerizing

• Tin / Copper Plating

Specifications

• Diameter Range: M3 to M64 (Metric); 1/4″ to 2-1/2″ (Imperial)

• Length Range: 5mm to 400mm (Metric); up to 30″ (Imperial)

• Thread Pitch: Coarse (standard) and Fine thread options

• Strength Grades: 4.8, 8.8, 10.9, 12.9 (Metric); Grade 2, Grade 5, Grade 8 (Imperial)

• Tensile Strength (Grade 8.8): 120,000 psi minimum

• Tensile Strength (Grade 12.9): 150,000 psi minimum

• Key Standards: ASME B18.2.1, ISO 4014/4017, DIN 931/933, GB/T 5782-2016

• Temperature Range: -40°C to +85°C (standard); up to +120°C (special alloys)

Applications

• Structural steel connections in bridges, buildings, and highway structures

• Heavy machinery and equipment assembly (mining, construction, manufacturing)

• Automotive and transportation infrastructure (rail tracks, vehicle assemblies)

• Flange joints in piping systems (oil, gas, petrochemical)

• Wind turbine tower assembly and nacelle components

• Headed anchor bolts for concrete foundations

• General MRO and industrial maintenance

Best Practice Case Example

Scenario: Assembling a primary structural steel beam connection for a commercial building requiring seismic compliance.

• Selected Product: M20 x 100mm Heavy Hex Structural Bolt.

• Material: Medium Carbon Steel, ASTM A325 Type 1 .

• Strength Grade: 8.8 (120,000 psi minimum tensile strength) .

• Finish: Hot-Dip Galvanized (HDG) per ASTM A123 .

• Installation Data: Requires 21mm clearance hole; 46mm thread length; installed with ASTM A194 Grade 2H heavy hex nut and hardened washer; tensioned to specified torque per AISC standards .

• Performance: Provides 120,000 psi minimum tensile strength with corrosion resistance for exterior exposure. Larger head bearing area (31mm across flats) distributes load effectively, meeting seismic requirements for structural connections.