Thread Cutting Screws Selection Guide

Thread Cutting Screw

YOUR EASY GUIDE TO SHAKEPROOF FOR USE IN METALS MATERIAL

Thick ness	Material	Screw Size	8-32		8-63		10-24		10-32		12-24		12-28		1/4-20			1/4-20
Thick ness	Material	Drill Size	NO.	DIA.	NO.	DIA.	NO.	DIA.	NO.	DIA.	NO.	DIA.	NO.	DIA.	NO.	DIA.	NO.	DIA.
Up To .047	Steel Stainless Steel Aluminum-Sheet		29	.136	28	.140	23	.154	20	.161	15	.180	13	.185	5	.205	7/32	.2188
			29	.136	28	.140	23	.154	20	.161	15	.180	13	.185	5	.205	7/32	.2188
			29	.136	29	.136	24	.152	20	.161	16	.177	14	.182	13/64	.2031	7/32	.2188
.063	Steel Stainless Steel Aluminum-Sheet		29	.136	28	.140	23	.154	19	.166	15	.180	13	.185	4	.209	7/32	.2188
			28	.140	27	.144	21	.159	19	.166	13	.185	12	.189	3	.213	2	.221
			29	.136	28	.140	24	.152	20	.161	16	.177	14	.182	13/64	.2031	7/32	.2188
.078	Steel Stainless Steel Aluminum-Sheet		28	.140	28	.140	3/32	.1562	19	.166	14	.182	3/16	.1875	4	.209	2	.221
			28	.140	27	.144	3/32	.1562	19	.166	14	.182	3/16	.1875	4	.209	7/32	.2188
			29	.136	28	.140	23	.154	20	.161	15	.180	13	.185	5	.205	7/32	.2188
.094	Steel Stainless Steel Aluminum-Sheet		28	.140	27	.144	21	.159	19	.166	13	.815	12	.189	3	.213	2	.221
			27	.144	27	.144	20	.161	18	.169	12	.189	11	.191	7/32	.2188	1	.228
			29	.136	28	.140	3/32	.1562	19	.166	14	.182	3/16	.1875	4	.209	2	.221
.109	Steel Stainless Steel Aluminum-Sheet		27	.144	27	.144	21	.159	19	.166	13	.185	12	.189	3	.213	2	.221
			27	.144	27	.144	20	.161	18	.169	12	.189	11	.191	7/32	.2188	1	.288
			28	.140	28	.140	3/32	.1562	19	.166	14	.182	3/16	.1875	4	.209	2	.221
.125	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron		27	.144	26	.147	19	.166	18	.169	11	.191	10	.193	7/32	.2188	1	.228
			26	.147	25	.149	19	.166	11/64	.1719	10	.193	9	.196	2	.221	1	.228
			28	.140	27	.144	21	.159	19	.166	13	.185	11	.191	3	.213	2	.221
			26	.147	26	.147	19	.166	11/64	.1719	11	.191	9	.196	2	.221	1	.228
			24	.152	24	.152	17	.173	16	.177	8	.199	7	.201	1	.228	15/64	.2344
.141	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron		26	.147	26	.147	19	.166	11/64	.1719	11	.191	9	.196	2	.221	1	.228
			26	.147	25	.149	18	.169	17	.173	9	.196	8	.199	1	.228	A	.234
			28	.140	27	.144	21	.159	19	.166	13	.185	11	.191	3	.213	2	.221
			26	.147	26	.147	19	.166	11/64	.1719	11	.191	9	.196	2	.221	1	.228
			24	.152	23	.154	16	.177	15	.180	7	.201	13/64	.2031	A	.234	B	.238
.188	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron		24	.152	24	.152	17	.173	16	.177	8	.199	7	.201	1	.228	15/64	.2344
			23	.154	23	.154	16	.177	15	.180	7	.201	13/64	.2031	A	.234	B	.238
			26	.147	25	.149	19	.166	11/64	.1719	11	.191	9	.196	2	.221	1	.228
			26	.147	25	.149	19	.166	17	.173	10	.193	9	.196	2	.221	1	.228
			23	.154	5/32	.1562	16	.177	15	.180	13/64	.2031	5	.205	15/64	.2334	B	.234
.250	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron		23	.154	23	.154	16	.177	15	180	13/64	.2031	6	.204	A	.234	B	.238
			5/32	.1562	5/32	.1562	15	.180	14	.182	5	.205	5	.205	15/64	.2344	C	.242
			25	.149	25	.149	18	.169	17	.173	9	.196	8	.199	1	.228	A	.234
			25	.149	25	.149	18	.169	17	.173	9	.196	8	.199	1	.228	A	.234
			22	.157	22	.157	15	.180	14	.182	5	.205	5	.205	B	.238	C	.242
.313	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron		23	.154			16	.177	15	.180	13/64	.2031	6	.204	A	.234	B	.238
			5/32	.1562			15	.180	14	.182	5	.205	5	.205	b	.238	C	.242
			23	.154			16	.177	15	.180	13/64	.2031	5	.205	15/64	.2344	B	.2344
			25	.149			11/64	.1719	16	.177	9	.166	7	.201	1	.228	A	.234
			22	.157			15	.180	14	.182	5	.205	5	.205	B	.238	C	.242
.375 and Up	Steel Stainless Steel Aluminum-Sheet Cast Aluminum & Zinc Die Cast Cast Iron						16	.177			13/64	.2031			A	.234
							15	.180			5	.205			B	.238
							16	.177			13/64	.2031			15/64	.2344
							11/64	.1719			9	.196			1	.228
							15	.180			5	.205			B	.238
			Note: Type 1 Thread Cutting screws are recommended for steel parts with thickness less than 1/2 of the screw diameter Type 23 Thread Cutting screws are recommended for all other applications.

TYPE 23

TYPE 25

Screw Size

Cellulose Compounds

Phenolics Ploystyrene Urea- Foraldehyde Coumpounds

Recommended Counterbore

Screw Size

Cellulose Compounds

Phenolics Ploystyrene Urea- Foraldehyde Coumpounds

Drill No.

Dia.

Drill No.

Dia.

Drill No.

Dia.

Drill No.

Dia.

Depth

Drill No.

Dia.

2-56
3-48
4-40
5.40
6.32
8-32
1 0-24
1 2-24
1/4.20

48
44
40
35
31
27
19
12
2

.0760
.0860
.0980
.1100
.1200
.1440
.1660
.1890
.2210

5/64
43
39
33
V.
26
lB
10
1

.0781
.0890
.0995
.1130
.1250
.1470
.1695
.1935
.2280

43
38
32
29
28
19
12
7/32
E

.0890
.1090
.1160
.1360
.1400
.1660
.1890
.2187
.2500

2-32
3-28
4-24
5-20
6-20
8-18
10.1 6
12.14
'1/4-14

48
43
39
33
31
27
19
I2
2

.0760
.0890
.0995
.1130
.1200
.14 40
.1660
.1890
.2210

5/64
43
37
32
1/8
26
18
10
1

.0781
.0890
.1040
.1160
.1250
.1470
.1695
.1935
.2280

For Use in Plastics Recommended Hole Sizes

Thread Cutting Screws
Click on the Items Below:

· Thread-Cutting Screws
· Thread Cutting ScrewsTypes
· Type 1 and 23 Screws
· Type 25 For Plastics Screws
· Screw Selections
· Thread Cutting Screw Guide
· Point Specifications
· Torque Specifications
· Special Heads and Points
· Flat Head
· Pan Head
· Hex Head
· Hex Washer Head
· Oval Head
· Sems and Nib Screws

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