Metric Size, Steel
Tommy Screws
Stud Type with Fixed Bar
DIN 6304
wo
DIN 6304
RoHS Compliant

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DIN 6304
Specification
Information

Body: Sandblasted steel, black oxide finish
Machined from solid bar
Tommy bar pressed in
Thrust point end of stud hardened
Thrust pad, see DIN 6311

The thrust point of these screws DIN 6304 is designed to be used with or without a thrust pad for clamping.
The snap ring is a simple and quick method to connect the thrust pad to the tommy screw.

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Dimensions in:

millimeters
(inches)

Part Number d1
Thread
l1
Stud
Length
d2 d3 d4 l2 l3 l4 l5 z
Without
Thrust Pad
With
Thrust Pad
6N40B21/E
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6N40B21/F
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M6 x 1.0 40 12
(.47)
5
(.20)
4.5
(.18)
10
(.39)
50
(1.97)
10
(.39)
2.2
(.09)
5.4
(.21)
6N50B21/E
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6N50B21/F
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50
8N50B21/E
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8N50B21/F
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M8 x 1.25 50 14
(.55)
6
(.24)
6
(.24)
12
(.47)
60
(2.36)
15
(.59)
3
(.12)
6.8
(.27)
8N60B21/E
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8N60B21/F
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60
10N60B21/E
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10N60B21/F
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M10 x 1.5 60 18
(.71)
8
(.31)
8
(.31)
14
(.55)
80
(3.15)
20
(.79)
3.6
(.14)
8.2
(.32)
10N70B21/E
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10N70B21/F
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70
12N70B21/E
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12N70B21/F
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M12 x 1.75 70 20
(.79)
10
(.39)
8
(.31)
18
(.71)
100
(3.94)
20
(.79)
4.5
(.18)
8.6
(.34)
12N80B21/E
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12N80B21/F
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80
16N75B21/E
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16N75B21/F
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M16 x 2.0 75 24
(.94)
12
(.47)
12
(.47)
20
(.79)
120
(4.72)
20
(.79)
5.3
(.21)
10.6
(.42)
16N90B21/E
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16N90B21/F
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90
16N110B21/E
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16N110B21/F
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110
20N75B21/E
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20N75B21/F
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M20 x 2.5 75 30
(1.18)
16
(.63)
15.5
(.61)
28
(1.10)
140
(5.51)
20
(.79)
5.6
(.22)
12.4
(.49)
20N90B21/E
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20N90B21/F
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90
20N110B21/E
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20N110B21/F
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110