|
Machine Screw Information
Machine Screws
Tapping & Clearance Hole
(sizes 0 - 6)
|
Machine Screw Size
|
Number of Threads Per Inch
|
Minor Dia.
|
Tap Drills
|
Clearance Hole Drills
|
|
Aluminum, Brass & Plastics
75% Thread
|
Stainless Steel, Steels & Iron
50% Thread
|
All Materials
|
|
Close Fit
|
Free Fit
|
|
No. or Dia.
|
Major Dia.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
|
0
|
.0600
|
80
|
.0447
|
3/64
|
.0469
|
55
|
.0520
|
52
|
.0635
|
50
|
.0700
|
|
1
|
.0730
|
64
|
.0538
|
53
|
.0595
|
1/16
|
.0625
|
48
|
.0760
|
46
|
.0810
|
|
72
|
.0560
|
53
|
.0595
|
52
|
.0635
|
|
2
|
.0860
|
56
|
.0641
|
50
|
.0700
|
49
|
.0730
|
43
|
.0890
|
41
|
.0960
|
|
64
|
.0668
|
50
|
.0700
|
48
|
.0760
|
|
3
|
.0990
|
48
|
.0734
|
47
|
.0785
|
44
|
.0860
|
37
|
.1040
|
35
|
.1100
|
|
56
|
.0771
|
45
|
.0820
|
43
|
.0890
|
|
4
|
.1120
|
40
|
.0813
|
43
|
.0890
|
41
|
.0960
|
32
|
.1160
|
30
|
.1285
|
|
48
|
.0864
|
42
|
.0935
|
40
|
.0980
|
|
5
|
.1250
|
40
|
.0943
|
38
|
.1015
|
7/64
|
.1094
|
30
|
.1285
|
29
|
.1360
|
|
44
|
.0971
|
37
|
.1040
|
35
|
.1100
|
|
6
|
.1380
|
32
|
.0997
|
36
|
.1065
|
32
|
.1160
|
27
|
.1440
|
25
|
.1495
|
|
40
|
.1073
|
33
|
.1130
|
31
|
.1200
|
Machine Screws
Tapping & Clearance Hole
(sizes 8 - 3/8)
|
Machine Screw Size
|
Number of Threads Per Inch
|
Minor Dia.
|
Tap Drills
|
Clearance Hole Drills
|
|
Aluminum, Brass & Plastics
75% Thread
|
Stainless Steel, Steels & Iron
50% Thread
|
All Materials
|
|
Close Fit
|
Free Fit
|
|
No. or Dia.
|
Major Dia.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
|
8
|
.1640
|
32
|
.1257
|
29
|
.1360
|
27
|
.1440
|
18
|
.1695
|
16
|
.1770
|
|
36
|
.1299
|
29
|
.1360
|
26
|
.1470
|
|
10
|
.1900
|
24
|
.1389
|
25
|
.1495
|
20
|
.1610
|
9
|
.1960
|
7
|
.2010
|
|
32
|
.1517
|
21
|
.1590
|
18
|
.1695
|
|
12
|
.2160
|
24
|
.1649
|
16
|
.1770
|
12
|
.1890
|
2
|
.2210
|
1
|
.2280
|
|
28
|
.1722
|
14
|
.1820
|
10
|
.1935
|
|
32
|
.1777
|
13
|
.1850
|
9
|
.1960
|
|
1/4
|
.2500
|
20
|
.1887
|
7
|
.2010
|
7/32
|
.2188
|
F
|
.2570
|
H
|
.2660
|
|
28
|
.2062
|
3
|
.2130
|
1
|
.2280
|
|
32
|
.2117
|
7/32
|
.2188
|
1
|
.2280
|
|
5/16
|
.3125
|
18
|
.2443
|
F
|
.2570
|
J
|
.2770
|
P
|
.3230
|
Q
|
.3320
|
|
24
|
.2614
|
I
|
.2720
|
9/32
|
.2812
|
|
32
|
.2742
|
9/32
|
.2812
|
L
|
.2900
|
|
3/8
|
.3750
|
16
|
.2983
|
5/16
|
.3125
|
Q
|
.3320
|
W
|
.3860
|
X
|
.3970
|
|
24
|
.3239
|
Q
|
.3320
|
S
|
.3480
|
|
32
|
.3367
|
11/32
|
.3438
|
T
|
.3580
|
Machine Screws
Tapping & Clearance Hole
(sizes 7/16 - 11/16)
|
Machine Screw Size
|
Number of Threads Per Inch
|
Minor Dia.
|
Tap Drills
|
Clearance Hole Drills
|
|
Aluminum, Brass & Plastics
75% Thread
|
Stainless Steel, Steels & Iron
50% Thread
|
All Materials
|
|
Close Fit
|
Free Fit
|
|
No. or Dia.
|
Major Dia.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
|
7/16
|
.4375
|
14
|
.3499
|
U
|
.3680
|
25/64
|
.3906
|
29/64
|
.4531
|
15/32
|
.4687
|
|
20
|
.3762
|
25/64
|
.3906
|
13/32
|
.4062
|
|
28
|
.3937
|
Y
|
.4040
|
Z
|
.4130
|
|
1/2
|
.5000
|
13
|
.4056
|
27/64
|
.4219
|
29/64
|
.4531
|
33/64
|
.5156
|
17/32
|
.5312
|
|
20
|
.4387
|
29/64
|
.4531
|
15/32
|
.4688
|
|
28
|
.4562
|
15/32
|
.4688
|
15/32
|
.4688
|
|
9/16
|
.5625
|
12
|
.4603
|
31/64
|
.4844
|
33/64
|
.5156
|
37/64
|
.5781
|
19/32
|
.5938
|
|
18
|
.4943
|
33/64
|
.5156
|
17/32
|
.5312
|
|
24
|
.5114
|
33/64
|
.5156
|
17/32
|
.5312
|
|
5/8
|
.6250
|
11
|
.5135
|
17/32
|
.5312
|
9/16
|
.5625
|
41/64
|
.6406
|
21/32
|
.6562
|
|
18
|
.5568
|
37/64
|
.5781
|
19/32
|
.5938
|
|
24
|
.5739
|
37/64
|
.5781
|
19/32
|
.5938
|
|
11/16
|
.6875
|
24
|
.6364
|
41/64
|
.6406
|
21/32
|
.6562
|
45/64
|
.7031
|
23/32
|
.6562
|
Machine Screws
Tapping & Clearance Hole
(sizes 3/4 - 1-3/16)
|
Machine Screw Size
|
Number of Threads Per Inch
|
Minor Dia.
|
Tap Drills
|
Clearance Hole Drills
|
|
Aluminum, Brass & Plastics
75% Thread
|
Stainless Steel, Steels & Iron
50% Thread
|
All Materials
|
|
Close Fit
|
Free Fit
|
|
No. or Dia.
|
Major Dia.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
|
3/4
|
.7500
|
10
|
.6273
|
21/32
|
.6562
|
11/16
|
.6875
|
49/64
|
.7656
|
25/32
|
.7812
|
|
16
|
.6733
|
11/16
|
.6875
|
45/64
|
.7031
|
|
20
|
.6887
|
45/64
|
.7031
|
23/32
|
.7188
|
|
13/16
|
.8125
|
20
|
.7512
|
49/64
|
.7656
|
25/32
|
.7812
|
53/64
|
.8281
|
27/32
|
.8438
|
|
7/8
|
.8750
|
9
|
.7387
|
49/64
|
.7656
|
51/64
|
.7969
|
57/64
|
.8906
|
29/32
|
.9062
|
|
14
|
.7874
|
13/16
|
.8125
|
53/64
|
.8281
|
|
20
|
.8137
|
53/64
|
.8281
|
27/32
|
.8438
|
|
15/16
|
.9375
|
20
|
.8762
|
57/64
|
.8906
|
29/32
|
.9062
|
61/64
|
.9531
|
31/32
|
.9688
|
|
1
|
1.000
|
8
|
.8466
|
7/8
|
.8750
|
59/64
|
.9219
|
1-1/64
|
1.0156
|
1-1/32
|
1.0313
|
|
12
|
.8978
|
15/16
|
.9375
|
61/64
|
.9531
|
|
20
|
.9387
|
61/64
|
.9531
|
31/32
|
.9688
|
|
1-1/16
|
1.0625
|
18
|
.9943
|
1.000
|
1.000
|
1-1/64
|
1.0156
|
1-5/64
|
1.0781
|
1-3/32
|
1.0938
|
|
1-1/8
|
1.1250
|
7
|
.9497
|
63/64
|
.9844
|
1-1/32
|
1.0313
|
1-9/64
|
1.1406
|
1-5/32
|
1.1562
|
|
12
|
1.0228
|
1-3/64
|
1.0469
|
1-5/64
|
1.0781
|
|
18
|
1.0568
|
1-1/16
|
1.0625
|
1-5/64
|
1.0781
|
|
1-3/16
|
1.1875
|
18
|
1.1193
|
1-1/8
|
1.1250
|
1-9/64
|
1.1406
|
1-13/64
|
1.2031
|
1-7/32
|
1.2188
|
Machine Screws
Tapping & Clearance Hole
(sizes 1-1/4 - 1-3/4)
|
Machine Screw Size
|
Number of Threads Per Inch
|
Minor Dia.
|
Tap Drills
|
Clearance Hole Drills
|
|
Aluminum, Brass & Plastics
75% Thread
|
Stainless Steel, Steels & Iron
50% Thread
|
All Materials
|
|
Close Fit
|
Free Fit
|
|
No. or Dia.
|
Major Dia.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
Drill Size
|
Decimal Equiv.
|
|
1-1/4
|
1.2500
|
7
|
1.0747
|
1-7/64
|
1.1094
|
1-5/32
|
1.1562
|
1-17/64
|
1.2656
|
1-9/32
|
1.2812
|
|
12
|
1.1478
|
1-11/64
|
1.1719
|
1-13/64
|
1.2031
|
|
18
|
1.1818
|
1-3/16
|
1.1875
|
1-13/64
|
1.2031
|
|
1-5/16
|
1.3125
|
18
|
1.2443
|
1-1/4
|
1.2500
|
1-17/64
|
1.2656
|
1-21/64
|
1.3281
|
1-11/32
|
1.3438
|
|
1-3/8
|
1.3750
|
6
|
1.1705
|
1-7/32
|
1.2187
|
1-17/64
|
1.2656
|
1-25/64
|
1.3906
|
1-13/32
|
1.4062
|
|
12
|
1.2728
|
1-19/64
|
1.2969
|
1-21/64
|
1.3281
|
|
18
|
1.3068
|
1-5/16
|
1.3125
|
1-21/64
|
1.3281
|
|
1-7/16
|
1.4375
|
18
|
1.3693
|
1-3/8
|
1.3750
|
1-25/64
|
1.3906
|
1-29/64
|
1.4531
|
1-15/32
|
1.4688
|
|
1-1/2
|
1.500
|
6
|
1.2955
|
1-11/32
|
1.3437
|
1-25/64
|
1.3906
|
1-33/64
|
1.5156
|
1-17/32
|
1.5312
|
|
12
|
1.3978
|
1-27/64
|
1.4219
|
1-7/16
|
1.4375
|
|
18
|
1.4318
|
1-7/16
|
1.4375
|
1-29/64
|
1.4531
|
|
1-9/16
|
1.5625
|
18
|
1.4943
|
1-12
|
1.500
|
1-33/64
|
1.5156
|
1-37/64
|
1.5781
|
1-19/32
|
1.5938
|
|
1-5/8
|
1.625
|
18
|
1.5568
|
1-9/16
|
1.5625
|
1-37/64
|
1.5781
|
1-41/64
|
1.6406
|
1-21/32
|
1.6562
|
|
1-11/16
|
1.6875
|
18
|
1.6193
|
1-5/8
|
1.6250
|
1-41/64
|
1.6406
|
1-45/64
|
1.7031
|
1-23/32
|
1.7188
|
|
1-3/4
|
1.750
|
5
|
1.5046
|
1-9/16
|
1.5625
|
1-5/8
|
1.6250
|
1-49/64
|
1.7659
|
1-25/32
|
1.7812
|
|
