The Hillman Group, Inc.

Michael K Falkenstein

Farhad Lajewardi

Beesham Mahadeo

Hamid Faghidi

Shreenivas Iyer

A sheet metal screw includes one or more of a tapered self-drilling tip, an asymmetric thread angle and/or a trilobular thread edge profile.

Sheet metal screw

A screw includes: a head end, a shank and a tapered end, the head end including a tool engaging part, the head end located at one end of the shank and the tapered end located at an opposite end of the shank, wherein a thread is formed along the shank, the thread begins on the tapered end, extends onto the shank and terminates at a set location short of the head end, the thread being a right-hand thread and having a peripheral edge, at least a first helical portion of the peripheral edge includes a plurality of notches and a second helical portion of the thread lacks any notches, wherein the first helical portion is closer to the tapered end than the second helical portion, wherein the head includes an underside formed by a frustoconical part with a plurality of nibs. The head may also include an outer ledge.

Screw-type fastener

A screw includes at least one helical thread with a peripheral edge having notched regions spaced apart by notch-free regions. An underside of a head of the screw includes projecting nibs.

Screw type fastener

A threaded fastener includes a head end, a shank and an entry end, the head end located at one end of the shank and the entry end located at an opposite end of the shank. The head end includes an end face with a drive recess configured for being driven by multiple drive bit shapes, including a star or six lobe drive, a Phillips drive, a square drive and a flat blade drive.

Combination recess for driven fastener

A multi-thread screw includes a head end, a shank and a tapered end. Both a high thread and a low thread begin on the tapered end and extend onto the shank. The tapered end of the thread may include a polygonal cross-sectional shape.

A multi-thread screw includes a head end, a shank and a tapered end. Both a high thread and a low thread begin on the tapered end and extend onto the shank. A set of intermediate threads are located on the shank portion only and overlap with and intersect at least part of the high thread.

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Oakville, Canada

Michael K Falkenstein