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About Tapping Screws
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Compare drilling, pointed, thread-forming, and thread-cutting tips to find the best choice for your material.
Steel Flanged Hex Head Drilling Screws
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Save time and effort with screws that drill and fasten in one step. The hex head gives you a firm, high-torque grip with a nutdriver or socket. Screws have a flange under the head that spreads the load to prevent crushing thin metal.
Length is measured from under the flange. Head height includes the flange.
Corrosion-Resistant-Coated Alloy Steel—The strongest steel drilling screws we sell. They have a coating that is tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments.
Drill Tip | Head | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Point Size | Lg. | Wd. | Ht. | Flange Dia. | Max. Drilling Thk. | Tapping Screw Type Designation | Approx. Threads per In. | Pkg. Qty. | Pkg. | |||
Corrosion-Resistant-Coated Alloy Steel | |||||||||||||
No. 10 Screw Size | |||||||||||||
| 3/4" | No. 3 | 13/64" | 0.313" | 0.151" | 0.414" | 0.15" | BSD | 16 | 25 | 90122A313 | 000000 | ||
No. 12 Screw Size | |||||||||||||
| 7/8" | No. 3 | 19/64" | 0.313" | 0.194" | 0.432" | 0.187" | BSD | 14 | 25 | 90122A316 | 00000 | ||
| 1" | No. 3 | 19/64" | 0.313" | 0.194" | 0.432" | 0.187" | BSD | 14 | 25 | 90122A319 | 00000 | ||
| 1 1/2" | No. 3 | 19/64" | 0.313" | 0.194" | 0.432" | 0.187" | BSD | 14 | 25 | 90122A321 | 00000 | ||
| 2" | No. 3 | 19/64" | 0.313" | 0.194" | 0.432" | 0.187" | BSD | 14 | 25 | 90122A324 | 00000 | ||
1/4" Screw Size | |||||||||||||
| 1" | No. 3 | 5/16" | 0.375" | 0.24" | 0.52" | 0.21" | BSD | 14 | 10 | 90122A329 | 00000 | ||
| 1 1/8" | No. 4 | 7/16" | 0.375" | 0.24" | 0.52" | 0.236" | CSD | 20 | 10 | 90122A335 | 00000 | ||
| 1 1/2" | No. 3 | 5/16" | 0.375" | 0.24" | 0.52" | 0.21" | BSD | 14 | 10 | 90122A333 | 00000 | ||
| 1 1/2" | No. 4 | 7/16" | 0.375" | 0.24" | 0.52" | 0.236" | CSD | 20 | 10 | 90122A338 | 00000 | ||
| 2" | No. 4 | 27/64" | 0.375" | 0.24" | 0.52" | 0.236" | CSD | 20 | 10 | 90122A341 | 00000 | ||
| 2 1/2" | No. 4 | 27/64" | 0.375" | 0.24" | 0.52" | 0.236" | CSD | 20 | 10 | 90122A345 | 00000 | ||
Steel Phillips Flat Head Drilling Screws
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In one step, drill and fasten trim, brackets, and other objects with countersunk holes. These screws have a flat, beveled head to sit flush with surfaces. The Phillips drive withstands less torque than a hex drive, so drill with even, steady pressure.
Length is measured from the top of the head.
Corrosion-Resistant-Coated Alloy Steel—The strongest steel drilling screws we sell. They have a coating that is tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments.
Drill Tip | Head | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Point Size | Lg. | Dia. | Ht. | Max. Drilling Thk. | Tapping Screw Type Designation | Drive Size | Approx. Threads per In. | Countersink Angle | Flat Head Profile | Pkg. Qty. | Pkg. | |||
Corrosion-Resistant-Coated Alloy Steel | |||||||||||||||
No. 12 Screw Size | |||||||||||||||
| 1" | No. 3 | 9/32" | 0.415" | 0.09" | 0.187" | BSD | No. 3 | 14 | 82° | Standard | 25 | 90122A617 | 000000 | ||
| 1 1/2" | No. 3 | 9/32" | 0.415" | 0.09" | 0.187" | BSD | No. 3 | 14 | 82° | Standard | 25 | 90122A346 | 00000 | ||
1/4" Screw Size | |||||||||||||||
| 3" | No. 4 | 1/2" | 0.46" | 0.1" | 0.312" | BSD | No. 3 | 20 | 82° | Standard | 10 | 90122A347 | 0000 | ||
| 4" | No. 4 | 1/2" | 0.46" | 0.1" | 0.312" | BSD | No. 3 | 20 | 82° | Standard | 10 | 90122A348 | 00000 | ||
