Metallics JFWP20SS 8 x 1-1/4 in. Flat Head Phillips Wood Screws - 18-8 Stainless - Each

They are made from 18-8 stainless, which is the usual choice for exterior and damp-location work where a plated steel screw would rust. Stainless wood screws like these ship with no additional finish or coating, so the corrosion resistance comes from the base material, not a plating that can wear off at the drive recess.

Yes, if the countersink is cut for a #8 flat head. The head measures 0.292 to 0.332 in. across with a head height of 0.100 in., so a standard 82 degree countersink for a #8 brings it level with the surface. In softwood you can often just drive it and let the flat head pull itself in; in hardwood or on a metal plate, countersink first.

No. The JFWP20SS is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your project carries domestic sourcing language, these will not satisfy it.

A #2 Phillips bit. The JFWP20SS is a Phillips drive screw with a recess diameter of 0.191 to 0.204 in. and a recess depth of 0.113 to 0.136 in., so a #2 seats fully without camming out. A #1 will spin in the recess and a #3 will not bottom.

On lengths of 1 inch and over, roughly two thirds of the screw is threaded, so on the 1-1/4 in. JFWP20SS you get about 2/3 thread with a plain shank under the head. The thread runs 15 per inch and ends in a tapered point, so it draws two pieces of wood tight rather than jacking them apart.

The tapered point starts on its own in soft woods. In hardwood, near an edge, or in trim you care about, drill a pilot: a tapered-point #8 wood screw at 15 threads per inch relies on the wood to form the thread, and without a pilot hole the shank can split the stock. Clearance-drill the top piece so the flat head pulls the joint tight.

They ship in a jar of 100, and 100 is the order minimum. Shipping weight on the jar is 0.61 lbs. Other sizes and quantities in the JFWP series can be had by request.

That is the intended use. Metallics lists the JFWP series for the electrical, plumbing, heating and air conditioning trades, and a #8 x 1-1/4 in. flat head with a 2/3 thread length is the common size for fastening device boxes, clamps and straps to wood studs or blocking. The stainless material means you can use the same screw indoors and in wet or exterior locations without switching fasteners.

Head, drive and thread geometry follow ASME B18.6.1, with the thread specifically to ASME B18.6.1-1997. That is the inch wood screw standard, so the #8 head and 15 TPI thread will interchange with any other B18.6.1 #8 wood screw on a submittal.