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.
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.