Tapping Screws, Sheet Metal Screws

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Discount good for orders placed from July 21 through July 31, 2010. May be used multiple times. Not combinable with any other offers or discounts.

TAPPING SCREWS (SHEET METAL SCREWS)

Tapping screws/sheet metal screws are threaded fasteners with the unique ability to “tap” their own mating internal thread when driven into preformed holes in metallic and non-metallic materials. Tapping screws/sheet metal screws are high strength, one-piece, one-side-installation fasteners. Because they form or cut their own mating thread, there is unusually good thread fit which enhances resistance to their loosening in service. Tapping screws/sheet metal screws can be disassembled and are generally reusable.

Hole Sizes for Tapping Screws

Tapping Screw Point

Type A

Type AB

Type B

Sizes Usually Available - (see Online Store for details)
#4 TAPPING SCREWS
#5 TAPPING SCREWS
#6 TAPPING SCREWS
#7 TAPPING SCREWS
#8 TAPPING SCREWS
#10 TAPPING SCREWS
#12 TAPPING SCREWS
#14 TAPPING SCREWS

Lengths Usually Available - (see Online Store for details)
3/16 in.
1/4 in.
5/16 in.
3/8 in.
7/16 in.
1/2 in.
9/16 in.
5/8 in.
11/16 in.
3/4 in.
7/8 in.
1 in.
1 1/8 in.
1 1/4 in.
1 1/2 in.
1 5/8 in.
1 3/4 in.
2 in.
2 1/4 in.
2 1/2 in.
3 in.
3 1/2 in.
3 3/4 in.
4 in.

Suggested Hole Sizes for Types A, AB, and B Tapping Screws

Nominal Screw Size	Hole Diameter			Closest Drill Size to Mean Hole Diameter
Nominal Screw Size	Max	Mean	Min	Drill size	Drill Dia
0 - 48	0.049	0.046	0.043	56	0.0465
1 - 42	0.063	0.059	0.055	53	0.0595
2 - 32	0.077	0.072	0.067	49	0.073
3 - 28	0.090	0.084	0.078	45	0.082
4 - 24	0.103	0.096	0.089	41	0.096
5 - 20	0.114	0.107	0.100	36	0.1065
6 - 20	0.124	0.116	0.108	32	0.116
7 - 19	0.138	0.129	0.120	30	0.1285
8 - 18	0.148	0.138	0.128	29	0.136
10 - 16	0.170	0.159	0.148	21	0.159
12 - 14	0.194	0.182	0.169	14	0.182
1/4 - 14	0.226	0.211	0.196	4	0.209
5/16 - 12	0.289	0.270	0.251	I	0.272
3/8 - 12	0.356	0.333	0.310	Q	0.332
7/16 - 10	0.413	0.386	0.359	W	0.386
1/2 - 10	0.480	0.449	0.418	29/64	0.4531

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