Thumbscrew
DIN 464 knurled head, DIN 465 wing head (no single master standard)
Sizes
M3-M10 typical
Drive & head
Hand tightened - knurled or winged head, no tool
Materials
Steel, stainless, nylon
Strength / grades
General commercial, not strength graded
Hole and pilot guidance
Same tapped or clearance hole as the equivalent machine screw, plus finger room around the head.
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Where it is used
Tool-free access panels
Test equipment covers, PC cases and enclosures opened often by hand
View sourceWatch out for
- Hand tight is not very tight - poor choice where vibration is present.
- Small knurled heads hurt to grip hard.
- Plastic thumbscrews go brittle in heat and sunlight.