Metallics JBSC834 8-32 x 3/4 in. Socket Button Head Hex Cap Screws - Alloy Steel Black - Each

It's an 8-32 machine screw thread, 32 threads per inch, cut to the UN thread form under ANSI/ASME B1.1. Any clean 8-32 tapped hole or 8-32 nut takes it. Thread length runs the full 3/4 inch shank callout, and the screws are supplied plain, so no coating allowance to worry about when you chase the hole.

No. The manufacturer states these button head screws are not recommended for critical, high-strength applications. They are rated at 1940 lb minimum tensile with a core hardness of Rockwell C39-44, which is fine for enclosure covers, device mounting, brackets and panel work. If a joint is load bearing or life safety, use a socket head cap screw made to a structural grade instead.

The JBSC834 uses a hex (Allen) socket drive, not a slot or Torx. The socket depth is 0.052 inch, so a short-reach key or bit seats fully. Head width measures 0.298 to 0.312 inch with a head height of 0.077 to 0.087 inch, which is the low profile you want when clearance above the surface is tight.

They ship plain, black alloy steel with no corrosion plating called out. Plain alloy steel will rust in wet or exterior locations, so keep these indoors, in dry enclosures, or coat them yourself. For damp or outdoor runs pick a stainless or zinc plated screw in the same 8-32 x 3/4 size.

The JBSC834 is flagged compliant for both Buy American and ARRA. Country of origin is China, so if your specification requires domestic melt and manufacture rather than the compliance flag, confirm against the project's exact clause before submitting.

Head and body geometry follow ASME B18.3-2012, the socket cap screw standard, and threads follow ANSI/ASME B1.1. That means head width and height fall inside the published button head envelope, so they interchange with any other B18.3 button head screw of the same 8-32 x 3/4 size in a submittal.

Button head screws have a low, rounded crown. On the 8-32 size that's 0.077 to 0.087 inch of head height over a 0.298 to 0.312 inch head, so the fastener sits nearly flush and there is little to snag on in a wireway, trough or cover plate. A standard socket head cap screw of the same thread is taller with a larger bearing face, so go that route when you need more clamp load or a deeper hex engagement.

They come in a jar, and the order minimum is 100 count. So the buying unit is a 100-piece jar rather than loose pieces, which suits a service van or MRO stockroom where 8-32 hardware gets consumed steadily.