Aluminum +Stainless Steel Knurled Thumb Screws 6#-32 M3 M3.5 M4 Bolts Royal blue

Match the thread diameter to your existing tapped hole or threaded insert. UNC 6#-32 is the standard for most North American PC cases and ATX standoffs. M3 is common in small electronics enclosures and 3D printer frames. M3.5 fits some laptop-style chassis and mid-range enclosures. M4 is used in heavier aluminum extrusion assemblies and industrial enclosures. If unsure, use a thread gauge or check your chassis documentation before ordering.

Thread length should be at least equal to the panel or material thickness you're fastening through, plus enough engagement depth in the receiving nut or insert — typically 1× to 1.5× the thread diameter minimum. For thin sheet metal panels (1–2 mm), a 4–6 mm thread length is usually sufficient. For thicker extrusion slots or stacked panels, choose 10 mm or longer. Avoid bottoming out the screw in a blind hole.

The stainless steel shaft provides solid tensile and shear strength suitable for panel retention, access covers, and light-duty fixture mounting. These are not rated for high-vibration structural joints or load-bearing applications. For PC case panels, enclosure lids, and maker project frames, the holding strength is more than adequate for repeated hand-tightening cycles.

Hard anodizing creates an oxide layer that is integral to the aluminum surface rather than a coating sitting on top, so it resists chipping and peeling under normal use. Color may gradually fade with prolonged UV exposure or abrasive contact, but for indoor builds and enclosures the finish holds up well through repeated installation and removal cycles.

The stainless steel shaft offers good corrosion resistance in moderate humidity. The anodized aluminum head also resists surface oxidation. For fully outdoor or marine environments with salt spray or standing water, additional sealing or a fully stainless fastener may be more appropriate. For indoor electronics enclosures and workshop equipment, these perform reliably.

Yes — the UNC 6#-32 variant is the standard thread used in the vast majority of ATX, mATX, and ITX PC cases for side panel retention, drive cage covers, and expansion slot brackets. Select the 6#-32 thread diameter and a thread length of 4–6 mm for typical thin-panel applications. M3 variants suit SFF cases and some ITX builds that use metric hardware.

Each unit in the current listing ships as 1 pc (as indicated by the "Royal blue & 1pcs" variant option). If you need larger quantities for a full build or batch project, add multiple units to your cart or contact us to ask about bulk pricing options.