Set Screw

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About Set Screw

Set (grub) screws are fully threaded and headless, sitting flush inside the hole. They lock pulleys, gears and couplings to shafts by pressing their point against the shaft; the point style sets how they grip.

Standards ISO 4029 · DIN 916 · ISO 4026 · DIN 913 · ISO 4027 · DIN 914 · ISO 4028 · DIN 915

Alloy steel 45H, black

Hard point, the standard choice.

304 stainless

Corrosion resistant, lower hardness.

Nickel plated

Bright finish.

How to choose

• Cup point grips best but marks the shaft; flat point suits shafts with a machined flat.
• Cone point bites deepest; dog point locates into a drilled seat.
• At high speed use two screws 90 degrees apart or threadlocker.