These are #6-32 UNC screws — the standard thread used in the vast majority of PC cases worldwide. The shank length is 6mm (≈1/4″), which is the standard length for GPU brackets, PSU mounts, 3.5″ HDD bays, and PCI slot covers. If your case uses #6-32 standoffs (which most ATX, Micro-ATX, and Mini-ITX cases do), these will fit directly.

The O-rings are made from durable rubber and measure M4 × 8 × 2mm (inner diameter × outer diameter × thickness). The 2mm rubber layer sits between the screw head and the chassis surface, absorbing micro-vibrations and providing a degree of electrical insulation between the fastener and the panel.

In most cases, yes. The #6-32 UNC thread is the industry-standard for PC case fasteners and is compatible with cases from NZXT, Fractal Design, Corsair, Lian Li, Phanteks, Cooler Master, and most other major brands. If you're unsure, check your case manual or measure the existing screws — a 3.5mm thread diameter and 6mm length is the standard.

Both are functionally identical #6-32 hex screws made from Grade 8.8 carbon steel. The Black version has a black oxide finish for a stealthy, all-black interior aesthetic. The Silver version is nickel-plated for a classic chrome look. Choose based on your build's color scheme — performance and thread spec are the same.

No. The hand-tight thumb screws feature a knurled head designed for tool-free installation. They're ideal for side panels, top mesh covers, or any component you access regularly. They can generally be tightened to a secure fit by hand, though a light assist with a driver is fine if you prefer extra torque.

The rubber O-rings act as a mechanical buffer between the screw head and the metal chassis, absorbing micro-vibrations from spinning components like HDDs, PSUs, and case fans. Users typically notice a measurable reduction in resonance and low-frequency hum, especially in builds with multiple 3.5″ drives or high-RPM fans. Results vary by case material and component load.

Yes. The screws use a self-locking thread design that resists loosening under vibration. The Grade 8.8 carbon steel provides reliable clamping force, and the O-ring adds slight friction that further helps maintain tension. For long-term builds, these are generally more vibration-resistant than standard smooth-shank screws.

These screws are designed for indoor PC case use. The black oxide and nickel-plated finishes provide a basic level of corrosion resistance suitable for typical indoor environments. They are not recommended for outdoor use or high-humidity applications. For outdoor or marine environments, stainless steel fasteners would be a more appropriate choice.