Crest Cup™ Washer Assemblies - Dimensional Information
Pan Head

Pan Head Fasteners          HOME    BACK

 
  
 
NOTE: TORX® Drive shown. Specifications for other drive systems available upon request.
For TORX PLUSŪ Drive see Hex Head Specifications shown below

Pan Head Fasteners with Crest Cup Washers- Inch Sizes

()
Head
Drive
Washer
Screw Size
W
max-min
H
max-min
I
max-min
A ref
Size
D
max-min
T
max-min
C
max-min
2
.167 - .155
.062 - .053
.037 - .032
.081
T8
.210 - .200
.020 - .010
.040 - .020
4
.219 - 205
.080 - .070
.051 - .043
.111
T10
.250 - .244
.025 - .015
.050 - .030
6
.270 - 256
.097 - .087
.061 - .051
.132
T15
.320 - .307
.035 - .025
.070 - .050
8
.322 - .306
.115 - .105
.071 - .060
.155
T20
.380 - .370
.040 - .030
.080 - .060
10
.373 - .357
.133 - .122
.082 - .069
.178
    T25
.446 - .433
.040 - .030
.080 - .060
12
.425 - .407
.151 - .139
.092 - .078
.200
T27
.446 - .433
.040 - .030
.080 - .060
1/4
.492 - .473
.175 - .162
.102 - .086
.221
T30
.630- .610
.050 - .040
.100 - .080
5/16
.615 - .594
.218 - .203
.122 - .104
.266
T40
.880 - .870
.075 - .065
.150 - .130

Pan Head Fasteners with Crest Cup Washers- Metric Sizes

()
Head
Drive
Washer
Screw Size
W
max-min
H
max-min
I
max-min
A ref
Size
D
max-min
T
max-min
C
max-min
M2
4.00 - 3.70
1.60 - 1.40
0.81 - 0.68
1.75
T6
5.33 - 5.08
0.50 - 0.25
1.00 - 0.50
M2.5
5.00 - 4.70
2.10 - 1.90
1.10 - 0.93
2.39
T8
6.35 - 6.20
0.63 - 0.38
1.26 - 0.76
M3
5.60 - 5.30
2.40 - 2.20
1.30 - 1.10
2.82
T10
6.35 - .620
0.63 - 0.38
1.26 - 0.76
M3.5
7.00 - 6.60
2.60 - 2.30
1.54 - 1.31
3.35
T15
8.12 - 7.79
0.88 - 0.63
1.76 - 1.26
M4
8.00 - 7.60
3.10 - 2.80
1.81 - 1.54
3.94
T20
8.46 - 8.20
0.88 - 0.63
1.76 - 1.26
M5
9.50 - 9.10
3.70 - 3.40
2.08 - 1.76
4.52
T25
11.33 - 11.00
1.00 - 0.76
2.00 - 1.53
M6
12.00 - 11.50
4.60 - 4.30
2.58 - 2.19
5.61
T30
16.00 - 15.49
1.27 - 1.00
2.54 - 2.00
M8
16.00 - 15.50
6.00 - 5.60
3.11 - 2.64
6.76
T40
22.35 - 22.09
1.90 - 1.65
3.81 - 3.30
 
Crest Cup™ Sems Fasteners - Continued

Hex Head Fasteners

 
  
 
NOTES: Indent in top of hex optional. TORX PLUS® Drive shown. Specifications for other drive systems available upon request.

Hex Head Fasteners with Crest Cup Washers - Inch Sizes

()
Head
Drive
Washer
Screw Size
W
max-min
W1
min
H
I
max-min
A ref
Size
D
max-min
T
max-min
C
max-min
4
.188 - .181
.201
.090 - .080
.046 -.038
.111
10IP
.250 - .244
.025 - .015
.050 - .030
6
.205 - .244
.272
.100 - .090
.054 - .045
.132
15IP
.320 - .307
.035 - .025
.070 - .050
8
.250 - .244
.272
.121 - .111
.064 - .053
.155
20IP
.380 - .370
.040 - .030
.080 - .060
10
.312 - .305
.340
.133 - .122
.073 -.061
.178
25IP
.446 - .433
.040 - .030
.080 - .060
12
.312 - .305
.340
.155 - .138
.082 - .068
.200
27IP
.446 - .433
.040 - .030
.080 - .060
1/4
.375 - .367
.409
.190 - .172
.102 - .075
.221
30IP
.505 - .495
.050 - .040
.100 - .080
5/16
.500 - .489
.545
.230 - .208
.109 -.090
.266
40IP
.880 - .870
.075 - .065
.150 - .130

Hex Head Fasteners with Crest Cup Washers - Metric Sizes
(all dimensions shown in mm)
()
Head
Drive
Washer
Screw Size
W
max-min
W1
min
H
I
max-min
A ref
Size
D
max-min
T
max-min
C
max-min
M2
3.20 - 3.02
3.38
1.60 - 1.30
0.72 - 0.60
1.75
6IP
5.33 - 5.08
0.50 - 0.25
1.00 - 0.50
M2.5
4.00 - 3.82
4.28
2.10 - 1.80
0.98 - 0.81
2.39
8IP
6.35 - 6.20
0.63 - 0.38
1.26 - 0.76
M3
5.00 - 4.82
5.40
2.40 - 2.10
1.16 - 0.96
2.82
10IP
6.35 - .620
0.63 - 0.38
1.26 - 0.76
M3.5
5.50 - 5.32
5.96
2.70 - 2.40
1.37 - 1.14
3.35
15IP
8.12 - 7.79
0.88 - 0.63
1.76 - 1.26
M4
7.00 - 6.78
7.59
3.30 - 2.90
1.62 - 1.34
3.94
20IP
9.65 - 9.40
1.00 - 0.76
2.00 - 1.53
M5
8.00 - 7.78
8.71
3.80 - 3.30
1.85 - 1.54
4.52
25IP
11.33 - 11.00
1.00 - 0.76
2.00 - 1.53
M6
10.00 - 9.78
10.95
4.70 - 4.10
2.30 - 1.91
5.61
30IP
12.83 - 12.57
1.27 - 1.00
2.54 - 2.00
M8
13.00 - 12.73
14.26
6.00 - 5.20
2.77 - 2.30
6.76
40IP
22.35 - 22.09
1.90 - 1.65
3.81 - 3.30

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