Steel Socket Cap Screw 10.9
ISO 898-1 class 10.9 alloy-steel socket head cap screws to DIN 912 / ISO 4762. High-preload cylindrical-head fasteners for compact, counterbored machine joints. Listed M3–M33.
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Available Sizes & Finishes
263 sizes available
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Applications & Selection Guide
ISO 898-1 property class 10.9 socket head cap screws to DIN 912 / ISO 4762. Alloy steel, quenched and tempered to 1000 MPa, for high-preload counterbored joints. Listed M3–M33. This is the grade most machine designers mean by “high-tensile cap screw”.
Choose 10.9 for machine tools, presses, hydraulic manifolds, and compact joints that would otherwise need a larger 8.8 screw. Mate with class 10 nuts. Electroplated coatings on 10.9 require controlled process (hydrogen embrittlement). Button or countersunk heads of the same class do not develop the same tensile capacity as this cylindrical head.
Include M×L sizes, quantities, coating requirements, and destination in your quote request.
Technical guides
Bolt grades and sizes: 8.8, 10.9, 12.9, A2 and A4, and metric hex bolt dimensions
What the property classes 4.8, 8.8, 10.9 and 12.9 and stainless A2-70 and A4-70 mean, minimum strength and tensile loads, metric thread pitch and hex head sizes, DIN 933 vs DIN 931, and which nut goes with which bolt.
Read the guide →Screw types compared: socket head, countersunk, set, carriage, tapping and self-drilling screws, with their DIN and ISO standards
How socket head, button head, countersunk, low-head and set screws differ, what DIN 912, ISO 7380, DIN 7991, DIN 916, DIN 603, DIN 965, DIN 7981 and DIN 7504 stand for, and which screw to order for machinery, timber and sheet metal.
Read the guide →Product Information
Material Grade
ISO 898-1 class 10.9
Manufacturing Standard
DIN 912 / ISO 4762
Material Type
Steel
Category
Socket Cap Screw
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