BUTTON CAP SCREW

BASIC SCREW
DIAMETER
A
H
S
M
T
J
Y
HEAD
HEAD
HD SIDE
SPLINE
6 LOBE
SOCKET
KEY
FILLET
MAX STD
DIAMETER
HEIGHT
HEIGHT
SIZE
SIZE
SIZE
DEPTH
EXTENSION
LENGTH
max
min
max
min
ref
nom
ref
nom
min
max
min
nom
0
0.0600
0.114
0.104
0.032
0.026
0.010
0.048
---
0.0350
0.020
0.010
0.005
0.500
1
0.0730
0.139
0.129
0.039
0.033
0.010
0.060
---
0.0500
0.028
0.010
0.005
0.500
2
0.0860
0.164
0.154
0.046
0.038
0.010
0.060
---
0.0500
0.028
0.010
0.005
0.500
3
0.0990
0.188
0.176
0.052
0.044
0.010
0.072
---
1/16
0.035
0.010
0.005
0.500
4
0.1120
0.213
0.201
0.059
0.051
0.015
0.072
TX-7
1/16
0.035
0.010
0.005
0.500
5
0.1250
0.238
0.226
0.066
0.058
0.015
0.096
---
5/64
0.044
0.010
0.005
0.500
6
0.1380
0.262
0.250
0.073
0.063
0.015
0.096
TX-10
5/64
0.044
0.010
0.005
0.630
8
0.1640
0.312
0.298
0.087
0.077
0.015
0.111
TX-15
3/32
0.052
0.015
0.010
0.750
10
0.1900
0.361
0.347
0.101
0.091
0.020
0.145
TX-25
1/8
0.070
0.015
0.010
1.000
1/4
0.2500
0.437
0.419
0.132
0.122
0.031
0.183
TX-27
5/32
0.087
0.020
0.015
1.000
5/16
0.3125
0.547
0.527
0.166
0.152
0.031
0.216
TX-40
3/16
0.105
0.020
0.015
1.000
3/8
0.3750
0.656
0.636
0.199
0.185
0.031
0.251
TX-45
7/32
0.122
0.020
0.015
1.250
1/2
0.5000
0.875
0.851
0.265
0.245
0.046
0.372
TX-55
5/16
0.175
0.030
0.020
2.000
5/8
0.6250
1.000
0.970
0.331
0.311
0.062
0.454
TX-60
3/8
0.210
0.030
0.020
2.000

Button cap screws are designed and recommended for light, non-critical high strength applications. The low profile heads keep in line with sleek designs. A button head should be used when materials are too thin for a countersink but require a heat treated fastener.

The socket drive may be either FORGED or BROACHED at the manufacturer's option and is available in hex drive , spline and 6 lobe drive (TORX®). The maximum standard length listed above refers to lengths which are equal to or shorter, than the designated length. For longer screws, the length of the complete thread shall be the option of the manufacturer unless specified when manufactured to order.

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