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ISO 898-1 class 8.8 quenched-and-tempered hex bolts (DIN 933 / ISO 4017), full thread. Standard high-tensile metric fastener for machinery and steelwork — M3–M39.
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221 sizes available
ISO 898-1 property class 8.8 hex head bolts, fully threaded to DIN 933 / ISO 4017. Quenched and tempered carbon steel with 800 MPa nominal tensile strength (yield ≈ 640 MPa) — the default high-tensile metric fastener for machinery and steel construction.
Specify class 8.8 for machine bases, conveyor frames, plant equipment, racking, and general load-bearing steelwork. Full thread maximises engagement options in the DIN 933 length range; for longer assemblies that benefit from an unthreaded shank, ask about DIN 931 (ISO 4014) in the same property class. Use class 8 nuts and hardened washers as the joint design requires.
Request a quote with M×L sizes, quantities, surface finish (plain, zinc, or HDG), and delivery country.
ISO 898-1 class 8.8
DIN 933 / ISO 4017
Steel
Hex Bolt
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