One-Way Sheet Metal Screws

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Approximate Threads per Inch

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For Use In

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Maximum Drilling Thickness

0.025"

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Round

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Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

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Rounded Head Profile

25 Products

About Tapping Screws

Compare drilling, pointed, thread-forming, and thread-cutting tips to find the best choice for your material.

Tamper-Resistant One-Way Stainless Steel Rounded Head Screws for Sheet Metal

Image of Product. Front orientation. Contains MultipleImages. Tapping Screws. Tamper-Resistant One-Way Stainless Steel Rounded Head Screws for Sheet Metal.

Simple to install but hard to remove, these screws tighten with a common slotted driver. Once installed, the drive is difficult to turn with anything other than a one-way screw remover. Screws have a pointed tip that starts a hole in sheets up to 0.025" thick, but for thicker material you’ll need to drill first. These screws resist corrosion and have a rounded head for a finished look.

Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

One-Way Screw Removers—With two pins on the end, these tools grip one-way screws to loosen them when slotted drivers just slip.

	Tapping Screws									One-Way Screw Removers
		Head
	Lg.	Dia.	Ht.	Tapping Screw Type	Approx. Threads per In.	Drill Bit Size	Pkg. Qty.		Pkg.		Each
18-8 Stainless Steel







				No. 6 Screw Size

				3/8"	0.262"	0.104"	AB	18	32 Ga.	100	000000000	000000	0000000	000000


				1/2"	0.26"	0.103"	AB	18	32 Ga.	100	000000000	00000	0000000	00000
				3/4"	0.26"	0.103"	AB	18	32 Ga.	100	000000000	00000	0000000	00000
				1"	0.26"	0.103"	AB	18	32 Ga.	50	000000000	00000	0000000	00000




						No. 8 Screw Size

						3/8"	0.312"	0.123"	AB	15	29 Ga.	50	000000000	00000	0000000	00000


						1/2"	0.309"	0.12"	AB	15	29 Ga.	50	000000000	00000	0000000	00000
						3/4"	0.309"	0.12"	AB	15	29 Ga.	50	000000000	00000	0000000	00000
						1"	0.309"	0.12"	AB	15	29 Ga.	50	000000000	00000	0000000	00000
						1 1/4"	0.309"	0.12"	AB	15	29 Ga.	50	000000000	00000	0000000	00000
						1 1/2"	0.309"	0.12"	AB	15	29 Ga.	50	000000000	0000	0000000	00000




								No. 10 Screw Size

								1/2"	0.359"	0.137"	AB	12	21 Ga.	50	000000000	00000	0000000	00000


								3/4"	0.359"	0.137"	AB	12	21 Ga.	50	000000000	00000	0000000	00000
								1"	0.359"	0.137"	AB	12	21 Ga.	50	000000000	00000	0000000	00000
								1 1/2"	0.359"	0.137"	AB	12	21 Ga.	50	000000000	00000	0000000	00000
								2"	0.359"	0.137"	AB	12	21 Ga.	25	000000000	00000	0000000	00000




										No. 12 Screw Size

										1"	0.425"	1/8"	A	11	3/16"	25	000000000	0000	0000000	00000


										1 1/2"	0.425"	1/8"	A	11	3/16"	25	000000000	00000	0000000	00000
										2"	0.425"	1/8"	A	11	3/16"	25	000000000	00000	0000000	00000




												No. 14 Screw Size

												1/2"	0.472"	0.175"	AB	10	5.5 mm	50	000000000	00000	0000000	00000


												3/4"	0.472"	0.175"	AB	10	5.5 mm	25	000000000	00000	0000000	00000
												1"	0.472"	0.175"	AB	10	5.5 mm	25	000000000	00000	0000000	00000
1 1/2"												0.472"	0.175"	AB	10	5.5 mm	25	000000000	00000	0000000	00000
2"	0.472"											0.175"	AB	10	5.5 mm	25	000000000	00000	0000000	00000
3"	0.472"											0.175"	AB	10	5.5 mm	10	000000000	00000	0000000	00000