Metric Size, Steel or Stainless Steel
Grub Screw and Thrust Pad Assemblies
GN 638
GN 638-NI

GN 638

ISO 9001 Supplier

RoHS Compliant

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Specification
Information

Grub screw:
GN 638: Steel, black oxide finish
GN 638-NI: Stainless steel, European standard No. 1.4305 (American standard 303)
Thrust pad: Matte black technopolymer plastic (Polyacetal POM)

 GN 638 and GN 638-NI grub screw and thrust pad assemblies are a low cost solution for clamping operations or for load bearing purposes.
Another good feature is a smaller size ball diameter than the trunk of the threaded stud. As a result, the studs can be screwed into position from the ball side. The thrust pad can easily be hammered onto the ball end of the screw, and also easily dismantled.
Static load capacity has been determined by a series of tests but are approximate. For these tests the loads were placed vertically and centrally over the stud. At the measured load of 3500 N there was no remaining deformation visible on the thrust pad nor was there any breakage.
A combination of these assemblies with any handle component will give useful clamping options.
Temperature resistant to 80°C (175°F).
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Dimensions in:

millimeters
(inches)
Part Number
d2
Thread
l1
Stud Length
d1
l2
l3
A/F
Static Load [N]
GN 638
Steel
Version
GN 638-NI
Stainless Steel Version
M6 x 1
26
15
 (.59)
7.6
 (.30)
3.6
 (.14)
3
 (.12)
3500
36
46
M8 x 1.25
20
15
(.59)
7.6
 (.30)
2.5
 (.10)
4
 (.16)
3500
35
45
58
M8 x 1.25
20
18
(.71)
9.2
 (.36)
4.2
 (.17)
4
 (.16)
3500
35
45
58
M10 x 1.5
34
18
 (.71)
9.2
 (.36)
3.8
 (.15)
5
 (.20)
3500
44
57
74
Part Number
d2
Thread
l1
Stud Length
d1
l2
l3
A/F
Static Load [N]
GN 638
Steel
Version
GN 638-NI
Stainless Steel Version
M8 x 1.25
20
21
 (.83)
10
 (.39)
5
 (.20)
4
 (.16)
3500
35
45
58
M10 x 1.5
34
21
 (.83)
10
 (.39)
4.3
 (.17)
5
 (.20)
3500
44
57
74
M12 x 1.75
34
21
 (.83)
10
 (.39)
3.4
 (.13)
6
 (.24)
3500
57
74
94
M8 x 1.25
20
25
 (.98)
10.5
 (.41)
5.5
 (.22)
4
 (.16)
3500
35
45
58
Part Number
d2
Thread
l1
Stud Length
d1
l2
l3
A/F
Static Load [N]
GN 638
Steel
Version
GN 638-NI
Stainless Steel Version
M10 x 1.5
34
25
 (.98)
10.5
 (.41)
4.6
 (.18)
5
 (.20)
3500
44
57
74
M12 x 1.75
34
25
 (.98)
10.5
(.41)
3.6
 (.14)
6
 (.24)
3500
57
74
94
M8 x 1.25
20
32
 (1.26)
11
(.43)
6
 (.24)
4
 (.16)
3500
35
45
58
M10 x 1.5
34
32
 (1.26)
11
(.43)
5
 (.20)
5
 (.20)
3500
44
57
74
Part Number
d2
Thread
l1
Stud Length
d1
l2
l3
A/F
Static Load [N]
GN 638
Steel
Version
GN 638-NI
Stainless Steel Version
M12 x 1.75
34
32
 (1.26)
11
(.43)
4.2
 (.17)
6
 (.24)
3500
57
74
94
M8 x 1.25
20
40
 (1.57)
13
(.51)
8
 (.31)
4
 (.16)
3500
35
45
58
M10 x 1.5
34
40
 (1.57)
13
(.51)
7
 (.28)
5
 (.20)
3500
44
57
74
M12 x 1.75
34
40
 (1.57)
13
(.51)
6.2
 (.24)
6
 (.24)
3500
57
74
94