Concealed 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
Blind Mounting Hole Dia
+.003
-.000
Min.Depth Of Blind Hole (1)
A
Max.
E
±.010
C
Max.
Min.Dist Hole C/L To Edge
Max.
Hole in Attached Parts
Aluminum
Stainless Steel
.250
.375
.500
.625
.750
1.00
.112-40(#4-40)
CHA
CHC
440
4
6
8
10
12
/
.062
.172
.043
.041
.205
.171
.156
.135
CFHA
CFHC
.093
.075
.071
.138-32(#6-32)
CHA
CHC
632
4
6
8
10
12
16
.062
.213
.043
.041
.250
.212
.188
.160
CFHA
CFHC
.093
.075
.071
.164-32(#8-32)
CHA
CHC
832
4
6
8
10
12
16
.062
.290
.043
.041
.328
.289
219
.185
CFHA
CFHC
.093
.075
.071
.190-32(#10-32)
CHA
CHC
032
/
6
8
10
12
16
.062
.312
.043
.041
.350
.311
.250
.210
CFHA
CFHC
.093
.075
.071
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
Blind Mounting Hole Dia
+0.08
Min.Depth Of Blind Hole (1)
A
Max.
E
±0.25
C
Max.
Min.Dist Hole C/L To Edge
Max.
Hole in Attached Parts
Aluminum
Stainless Steel
M3X0.5
CHA
CHC
M3
4
6
8
10
12
16
1.6
4.37
1.1
1.04
5.21
4.35
4.0
3.6
CFHA
CFHC
2.4
1.91
1.8
M4X0.7
CHA
CHC
M4
4
6
8
10
12
16
1.6
7.37
1.1
1.04
8.33
7.35
5.6
4.6
CFHA
CFHC
2.4
1.91
1.8
M5X0.8
CHA
CHC
M5
/
6
8
10
12
16
1.6
7.93
1.1
1.04
8.89
7.9
6.4
5.6
CFHA
CFHC
2.4
1.91
1.8
Blind holes may be deeper than minimums except where sheet material is at or near minimum thickness .
Fasteners should always be installed so the flange is flush with the surface of the sheet.