Metallics JDS181V 10 x 3/4 in. 5/16 Indented Hex Head Slotted Sharp Point Tapping Screws - Steel Zinc - Each

The JDS181V ships in a jar of 500 count, and 500 is the order minimum. If you need a different size or quantity in this indented hex head slotted series, Metallics offers other sizes and quantities by request.

They need a hole. The JDS181V is a Type A tapping screw with a gimlet (sharp) point, so it pierces thin sheet metal and forms its own thread in a pre-punched or pre-drilled pilot hole. It is not a self-drilling screw, so it will not cut through heavier stock on its own. At 12 threads per inch with the coarse Type A thread, it holds well in sheet metal, electrical boxes, and light gauge framing.

The JDS181V is flagged compliant for both Buy American and ARRA, which is what a government, school, or federally funded project submittal usually asks for. Country of origin is listed as multiple, so confirm the origin on the specific lot if your contract requires a single named country of manufacture.

Dimensions follow ASME B18.6.3-2010 and the thread follows ASME B18.6.4, the Type A tapping screw thread standard. Steel is per AISI 1016-1024. One caveat worth noting for a submittal: within this Metallics series, dimensions for the number 9 diameter are independent of ASME B18.6.4. The number 10 size here is the standard size.

Number 10 diameter, 3/4 inch long, with a 5/16 indented hex washer head. The integral washer under the head runs 0.384 to 0.414 inch outside diameter and 0.019 to 0.031 inch thick, so it spreads the clamp load on sheet metal without needing a separate washer.

These are steel with a zinc plated finish, which is a mild corrosion barrier meant for dry interior work, electrical enclosures, and protected locations. Zinc plating is not a substitute for hot dip galvanizing or stainless in wet, exterior, or coastal exposure. For an outdoor enclosure or a damp environment, specify a stainless or galvanized tapping screw instead.

Torsional strength is 48 lb-in minimum, with case hardness at Rockwell C28-38 on AISI 1016-1024 steel. That is adequate for hand and standard screwgun driving into sheet metal. A high torque impact driver can exceed 48 lb-in and twist the head off, so drive them with a clutched screwgun or set your impact on a low setting.

Yes, the head is slotted as well as hex. The slot runs 0.05 to 0.06 inch wide and 0.057 to 0.072 inch deep, so a small to medium flat blade seats in it. In practice the 5/16 hex is the better drive because it takes more torque without camming out; keep the slot for tight spots where a nut driver will not reach.

A jar of 500 JDS181V screws is listed at 3.15 lbs, with the container measuring 5.75 by 3.5 by 3.5 inches. Easy to stock on a van or in a job box without eating shelf space.