White Truss Head Screws Spanner Painted Temper Proof Security Bolt

The white truss head screws are made of carbon steel or stainless steel or the other material, the white is painted just on the head. The spanner screw drive uses two round holes opposite each other and is designed to prevent tampering. Ever Hardware provides custom-made white truss head screws and customizable packaging.
Other informal names include pig nose, drilled head, or twin hole. This type is often seen in elevators and restrooms in the United States, the London Underground in the United Kingdom, some train wagons, and the Montreal Metro in Montreal, Quebec, and is seen in all Panama Metro wagons. The driving tool is called a “spanner driver” or “spanner screwdriver” in the US, and a “pin spanner” in the UK. They are also often used for soft spikes on golf shoes.
The knife and gun manufacturer Microtech uses a variation of this with 3 round holes arranged in a triangle shape. The camera company Leica Camera has used versions of this on rewind knobs and other levers on their rangefinder cameras.

Truss head refers to a screw head that is extra wide and has a slightly rounded surface, or top. In other words, the head or top on the screw protrudes just above the surface to be fastened but contains a wider surface area just under the head.
These screws can be used for applications like securing thin membranes, such as one-ply, through insulation. Wooden truss head screws are also commonly used to attach cabinets to steel studs; or to attach sliding shelf supports, since the low-profile head of the truss head screw does not interfere with guide operation.
Truss head screws are well suited for sheet metal and other material with large diameter holes due to their wide head. Additionally, because of their low-dome shaped head, these screws make tampering with or removing the head difficult.

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