STAINLESS STEEL 2HOLE RAISED COUNTERSUNK SECURITY SCREWS

2Hole Raised Countersunk Security Screws — This head style pairs the 2Hole drive pattern — two round holes that only a matching two-pin driver can engage — with a head that seats flush at its base but rises into a domed crown above the surface, giving a more traditional, finished look than the flat countersunk version in the same range. It sits between the pan head, which stands fully proud, and the flat countersunk head, which finishes entirely level, offering a slightly larger bearing surface and a decorative profile while retaining a countersunk fixing hole. Because the 2Hole pattern is one of the least commonly available security drives, this head style is often chosen for visible, higher-security fittings where appearance still matters — decorative panelling, signage, and fixtures in controlled-access or public environments where a very high level of tamper resistance is required alongside a finished look rather than a purely utilitarian one. It's a machine-thread screw for use with an existing tapped hole, nut, or insert; the pan or countersunk self-tapping versions within the 2Hole group are the ones to look at if the base material needs a thread formed directly into it instead. Grade choice depends on the environment rather than the drive pattern: A2 is generally sufficient indoors or under shelter, while A4 is worth the extra cost outdoors, in coastal locations, or anywhere exposed to washdown or de-icing salt, since it resists pitting corrosion far longer than A2 under sustained exposure. As with the rest of the 2Hole range, there's no ISO or DIN standard covering this proprietary drive; it's a manufacturer-specific pattern, and its driver bits are correspondingly specific to the same source rather than generally available. Deciding between this and the flat countersunk head in the same range mostly comes down to whether the marginally larger, domed profile and its more traditional appearance are worth the head standing slightly above the surface, rather than finishing completely flush.

FAQs
Does the head sit fully flush?
No, only the countersunk base is flush; the domed crown sits proud of the surrounding surface.

Is a self-tapping equivalent available?
This is the machine-thread version. Check the pan or countersunk self-tapping ranges within the 2Hole group for thread-forming equivalents.

How does the 2Hole driver differ from the other security drive types PTS stocks?
It uses two pins rather than a lobed or hex profile, and is not interchangeable with Hexalobular + Pin or Hex Socket + Pin bits, even though all three are described as security drives.