Metallics JSPMP122434SS 12-24 x 3/4 in. Pan Head Phillips Machine Screws - 18-8 Stainless - Each

Yes. 12-24 is the standard thread used in steel outlet boxes, mud rings, and device plaster rings, and the Metallics JSPMP122434SS is a 12-24 screw at 24 threads per inch. The 3/4 inch length gives enough engagement for mounting fixtures, straps, and brackets to tapped box holes.

A #3 Phillips bit. The recess is 0.252 inch in diameter with a gaging depth of 0.098 to 0.124 inch, so a #2 bit will ride high in the recess and cam out under torque.

18-8 stainless is the usual choice for wet, damp, and exterior locations where plated steel screws would rust out, and these Metallics pan head screws are 18-8 throughout. For heavy chloride exposure, such as coastal or pool chemical rooms, 316 stainless is the step up.

Head height runs 0.139 to 0.151 inch and head width 0.407 to 0.425 inch. That matters when the screw head sits behind a cover plate or inside a raceway, since the pan profile stands proud of the surface rather than sitting flush like a flat head.

They come in a jar, with a 100 count minimum order. Good for a shop shelf or a truck stock bin rather than a single-screw pull.

Both the Buy American and ARRA fields are flagged compliant for the JSPMP122434SS. Country of origin is China, so confirm which clause your contract is written under before you submit them on a federally funded project.

Tensile strength is listed at 80,000 psi minimum, with hardness in the Rockwell B range. Metallics notes that tensile values for stainless screws are approximations because there is no single performance standard for stainless machine screws, so where a specific graded strength is required on a structural connection, a graded steel fastener is the correct call.

ASME B18.6.3-2010, with material called out to SAE. That is the standard spec sheet reference for inch-series machine screw head and recess dimensions, so the head and drive will match anything else specified to B18.6.3.