Metallics JBSC634 6-32 x 3/4 in. Socket Button Head Hex Cap Screws - Alloy Steel Black - Each

The head measures 0.25 to 0.262 in. across and only 0.063 to 0.073 in. tall, so it sits nearly flush and clears tight spaces where a standard socket cap head would foul a cover or a sliding part. That head width spans a drilled hole up to about a quarter inch, but it will pull through anything larger, so use a washer on oversize or slotted holes.

No. These screws are supplied plain, with no protective plating, in alloy steel with a black finish. Plain alloy steel will rust in wet or washdown locations. Keep them inside dry enclosures and interior panels, and specify a plated or stainless fastener for exterior, damp, or corrosive service.

No. Metallics states plainly that these button head socket screws are not recommended for critical, high-strength applications. They are hardened to Rockwell C39-44 with a 1260 lb minimum tensile, which is fine for mounting plates, brackets, covers, and device hardware, but a structural or safety-critical joint calls for a standard socket head cap screw rated for that duty.

Hex (Allen) drive, not a slot or Phillips, and the socket depth is 0.044 in. Keep the key seated fully in that shallow socket. The small socket on a 6-32 button head strips easily if the key is cocked or worn, so use a sharp key rather than a ball end for final tightening.

Head geometry follows ASME B18.3-2012 for socket head products, and the thread is to ANSI/ASME B1.1. If a submittal or drawing calls out B18.3 button head socket screws, the JBSC634 meets that dimensional callout at 6-32 x 3/4 in.

They ship in a jar, with a 100-count minimum order. That is the buy unit, so a single jar of 100 is the smallest purchase. Metallics also offers other sizes and quantities of this button head socket line by request.

The JBSC634 carries both ARRA and Buy American compliance flags, with country of origin China. On federally funded work, confirm which clause your contract actually invokes, since a domestic-melt or domestic-manufacture requirement is a different test than the ARRA designation.

Profile is the whole reason. At 0.063 to 0.073 in. tall with a 0.25 in. wide dome, a button head sits low and wide, which is what you want where a cover must close over the fastener or where a taller cylindrical head would catch a hand or a moving part. The tradeoff is the shallow 0.044 in. socket and the lower strength rating: for anything carrying real load, go to a standard socket head cap screw instead.

Yes. Metallics notes that screws must be at least 3 diameters long to be subject to tensile testing. A number 6 screw is roughly 0.138 in. in diameter, so 3/4 in. is well past three diameters, and the 1260 lb minimum tensile applies.