Computer Case Thumbscrew PC Computer Case Fastener Thumb Screw for Cover/Power Supply/PCI Slots/Hard Drive

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1.Superior Mechanical Performance
Crafted from quenched-and-tempered alloy steel (e.g. SAE 4140), these PC-case thumb screws deliver tensile strengths ≥800 MPa and yield strengths ≥600 MPa, with a core hardness of 28–35 HRC. A precision zinc-plated or black-oxide finish (8–12 µm) offers moderate corrosion resistance and ensures smooth, repeatable thread engagement in standard M3, M4, or 6-32 UNC rails.

2.Broad Application Range
Suitable for all types of Cover / Power Supply / PCI Slots / Hard Drives fixing and drive bays. Engineered for fastening computer chassis panels, securing power supplies, locking down PCI-slot covers, hard-drive cages, SSD brackets, and expansion modules. Their standard sizes and thread pitches make them compatible with virtually all ATX, micro-ATX, and mini-ITX enclosures, as well as accessories like fan brackets and drive adapters.

3.Effortless Tool-Free Operation
The large, knurled head provides an ergonomic grip for secure finger-tightening up to 2–4 Nm, eliminating the need for screwdrivers or wrenches. Quick-release capability lets you swap cards or drives in seconds, and consistent torque control prevents over-tightening and frame distortion.

4.Premium Quality & Reliability
Manufactured in ISO 9001-certified facilities with full material traceability. Each lot undergoes dimensional inspection (±0.1 mm), hardness testing, and plating‐thickness verification. Zinc finishes meet or exceed 48 h salt-spray resistance per ASTM B117, ensuring long-term durability in home, office, or datacenter environments.