Steel Set Screw
ISO 898-5 class 45H hex-socket cup-point set screws to DIN 916 / ISO 4029. Headless fasteners for locking collars, pulleys, and adjustable stops. Listed M3–M24.
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Available Sizes & Finishes
67 sizes available
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Applications & Selection Guide
ISO 898-5 hardness class 45H hex-socket set screws (grub screws) to DIN 916 / ISO 4029, cup point. Headless — the entire body is threaded — so the screw sits inside a tapped hole and the cup bites the shaft. Listed M3–M24.
Used to lock collars, pulleys, gears, knobs, and adjustable stops on round shafts. Cup point is the general-purpose tip; it marks the shaft. Set screws are not tensile bolts — do not use them to clamp two plates together. Class 45H is a hardness designation (ISO 898-5), not an ISO 898-1 4.8/8.8/10.9 property class.
Select M×L from the table above. Quote with quantity, coating, and destination.
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 898-5 class 45H
Manufacturing Standard
DIN 916 / ISO 4029
Material Type
Steel
Category
Set Screw
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