Round Head Studs
All dimensions are in inches (Size Unit: inch)
UNIFIED
Thread Size
Type
Thread Code
Length "L" ±.015
( Length Code is in 16ths of an inch)
Min.Sheet Thickness
Hole Size In Sheet +.003
Max.Hole in Attach Parts
H
±.015
S Max.
Min.Dist Hole C/L To Edge
Steel
Stainless Steel
Aluminum
.250
.312
.375
.500
.625
.750
.875
1.00
1.25
1.50
.086-56(#2-56)
FH
FHS
FHA
256
4
5
6
8
10
12
/
/
/
/
.040
.085
.105
.144
.075
.187
.112-40(#4-40)
FH
FHS
FHA
440
4
5
6
8
10
12
14
16
/
/
.040
.111
.135
.176
.085
.219
.138-32(#6-32)
FH
FHS
FHA
632
4
5
6
8
10
12
14
16
20
24
.040
.137
.160
.206
.090
.250
.164-32(#8-32)
FH
FHS
FHA
832
4
5
6
8
10
12
14
16
20
24
.040
.163
.185
.237
.090
.281
.190-24(#10-24)
FH
FHS
FHA
024
/
5
6
8
10
12
14
16
20
24
.040
.189
.210
.256
.100
.281
.190-32(#10-32)
FH
FHS
FHA
032
/
5
6
8
10
12
14
16
20
24
.040
.189
.210
.256
.100
.281
.250-20(1/4-20)
FH
FHS
FHA
0420
/
/
6
8
10
12
14
16
20
24
.062
.249
.270
.337
.135
.312
.313-18(5/16-18)
FH
FHS
FHA
0518
/
/
/
8
10
12
14
16
20
24
.093
.311
.333
.376
.160
.375
All dimensions are in millimeters (Size Unit: mm)
METRIC
Thread Size
Type
Thread Code
Length Code"L" ± 0.4
( Length Code is in millimeters)
Min.Sheet Thickness
Hole Size In Sheet +0.08
Max.Hole in Attach Parts
H
±0.4
S Max.
Min.Dist Hole C/L To Edge
Steel
Stainless Steel
Aluminum
M2.5X0.45
FH
FHS
FHA
M2.5
6
8
10
12
15
18
/
/
/
/
1
2.5
3.1
4.1
1.95
5.4
M3X0.5
FH
FHS
FHA
M3
6
8
10
12
15
18
20
25
/
/
1
3
3.6
4.6
2.1
5.6
M3.5X0.6
FH
FHS
FHA
M3.5
6
8
10
12
15
18
20
25
30
/
1
3.5
4.1
5.3
2.25
6.4
M4X0.7
FH
FHS
FHA
M4
6
8
10
12
15
18
20
25
30
35
1
4
4.6
5.9
2.4
7.2
M5X0.8
FH
FHS
FHA
M5
/
8
10
12
15
18
20
25
30
35
1
5
5.6
6.5
2.7
7.2
M6X1.0
FH
FHS
FHA
M6
/
/
10
12
15
18
20
25
30
35
1.6
6
6.6
8.2
3
7.9
M8X1.25
FH
FHS
FHA
M8
/
/
/
12
15
18
20
25
30
35
2.4
8
8.6
9.6
3.7
9.6