Metric Size, Sintered Stainless Steel
Serrated Locking Plates

GN 187.4-NI


RoHS Compliant

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Specification
Information

Locking plates: Sintered stainless steel, European Standard No. 1.4404 (American Standard Series 316)

Type A - with tapped hole in the center and two counterbored holes for socket cap screws
Type B - with bore in the center and two counterbored holes for socket cap screws
Type C - with tapped hole in the center and two tapped mounting holes
Type D - with bore in the center and two tapped mounting holes
Type E - not hardened, blank

Shipping

With the aid of GN 187.4-NI serrated locking plates, standard components can be interlocked and firmly set at a defined angle.
The range of options makes these plates adaptable for almost any application. Useful complimentary components include GN  187.1 guide pots and GN 187.2 thrust springs.
For steel version see GN 187.4.

Installation Examples


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For CAD download instructions, click
HERE
Type A - Tapped Hole / Countersunk Mounting Holes

Dimensions in:

millimeters
(inches)

Part Number d1 d2 d3
Thread
d5 d7 H11 h1
+/- .9mm
h2
(2xh1)
m1 m2 w min. stroke
Version with
48 Teeth
Version with
60 Teeth
187.4-22-48-A-NI
Download the CAD
187.4-22-60-A-NI
Download the CAD
22
(.87)
15.5
(.61)
M4 x .7 3.2
(.13)
3
(.12)
6.5
(.26)
13
(.51)
12
(.47)
12
(.47)
.06
(.002)
187.4-27-48-A-NI
Download the CAD
187.4-27-60-A-NI
Download the CAD
27
(1.06)
19.5
(.77)
M5 x .8 4.3
(.17)
4
(.16)
7.5
(.30)
15
(.59)
15
(.59)
15
(.59)
.07
(.003)
187.4-32-48-A-NI
Download the CAD
187.4-32-60-A-NI
Download the CAD
32
(1.26)
23.5
(.93)
M6 x 1.0 5.3
(.21)
5
(.20)
9
(.35)
18
(.71)
18
(.71)
18
(.71)
.09
(.004)
187.4-40-48-A-NI
Download the CAD
187.4-40-60-A-NI
Download the CAD
40
(1.57)
30
(1.18)
M8 x 1.25 6.3
(.25)
6
(.24)
11.5
(.45)
23
(.91)
23
(.91)
23
(.91)
1.3
(.051)
 
Type B - Bore / Countersunk Mounting Holes

Dimensions in:

millimeters
(inches)

Part Number d1 d2 d4 H11
Bore
d5 d7 H11 h1
+/- .9mm
h2
(2xh1)
m1 m2 w min. stroke
Version with
48 Teeth
Version with
60 Teeth
187.4-22-48-B-NI
Download the CAD
187.4-22-60-B-NI
Download the CAD
22
(.87)
15.5
(.61)
4.2
(.17)
3.2
(.13)
3
(.12)
6.5
(.26)
13
(.51)
12
(.47)
12
(.47)
.06
(.002)
187.4-27-48-B-NI
Download the CAD
187.4-27-60-B-NI
Download the CAD
27
(1.06)
19.5
(.77)
 5.2
(.20)
4.3
(.17)
4
(.16)
7.5
(.30)
15
(.59)
15
(.59)
15
(.59)
.07
(.003)
187.4-32-48-B-NI
Download the CAD
187.4-32-60-B-NI
Download the CAD
32
(1.26)
23.5
(.93)
6.2
(.24)
5.3
(.21)
5
(.20)
9
(.35)
18
(.71)
18
(.71)
18
(.71)
.09
(.004)
187.4-40-48-B-NI
Download the CAD
187.4-40-60-B-NI
Download the CAD
40
(1.57)
30
(1.18)
8.2
(.32)
6.3
(.25)
6
(.24)
11.5
(.45)
23
(.91)
23
(.91)
23
(.91)
1.3
(.051)
 
Type C - Tapped Hole / Tapped Mounting Holes

Dimensions in:

millimeters
(inches)

Part Number d1 d2 d3
Thread
d6
Thread
d7 H11 h1
+/- .9mm
h2
(2xh1)
m1 m2 w min. stroke
Version with
48 Teeth
Version with
60 Teeth
187.4-22-48-C-NI
Download the CAD
187.4-22-60-C-NI
Download the CAD
22
(.87)
15.5
(.61)
M4 x .7 M3 x .6 3
(.12)
6.5
(.26)
13
(.51)
12
(.47)
12
(.47)
.06
(.002)
187.4-27-48-C-NI
Download the CAD
187.4-27-60-C-NI
Download the CAD
27
(1.06)
19.5
(.77)
M5 x .8 M4 x .7 4
(.16)
7.5
(.30)
15
(.59)
15
(.59)
15
(.59)
.07
(.003)
187.4-32-48-C-NI
Download the CAD
187.4-32-60-C-NI
Download the CAD
32
(1.26)
23.5
(.93)
M6 x 1.0 M5 x .8 5
(.20)
9
(.35)
18
(.71)
18
(.71)
18
(.71)
.09
(.004)
187.4-40-48-C-NI
Download the CAD
187.4-40-60-C-NI
Download the CAD
40
(1.57)
30
(1.18)
M8 x 1.25 M6 x 1.0 6
(.24)
11.5
(.45)
23
(.91)
23
(.91)
23
(.91)
1.3
(.051)
 
Type D - Bore / Tapped Mounting Holes

Dimensions in:

millimeters
(inches)

Part Number d1 d2 d4 H11
Bore
d6
Thread
d7 H11 h1
+/- .9mm
h2
(2xh1)
m1 m2 w min. stroke
Version with
48 Teeth
Version with
60 Teeth
187.4-22-48-D-NI
Download the CAD
187.4-22-60-D-NI
Download the CAD
22
(.87)
15.5
(.61)
4.2
(.17)
M3 x .6 3
(.12)
6.5
(.26)
13
(.51)
12
(.47)
12
(.47)
.06
(.002)
187.4-27-48-D-NI
Download the CAD
187.4-27-60-D-NI
Download the CAD
27
(1.06)
19.5
(.77)
 5.2
(.20)
M4 x .7 4
(.16)
7.5
(.30)
15
(.59)
15
(.59)
15
(.59)
.07
(.003)
187.4-32-48-D-NI
Download the CAD
187.4-32-60-D-NI
Download the CAD
32
(1.26)
23.5
(.93)
6.2
(.24)
M5 x .8 5
(.20)
9
(.35)
18
(.71)
18
(.71)
18
(.71)
.09
(.004)
187.4-40-48-D-NI
Download the CAD
187.4-40-60-D-NI
Download the CAD
40
(1.57)
30
(1.18)
8.2
(.32)
M6 x 1.0 6
(.24)
11.5
(.45)
23
(.91)
23
(.91)
23
(.91)
1.3
(.051)
 
Type E - Blank

Dimensions in:

millimeters
(inches)

Part Number d1 d2 h1
+/- .9mm
h2
(2xh1)
w min. stroke
Version with
48 Teeth
Version with
60 Teeth
187.4-22-48-E-NI
Download the CAD
187.4-22-60-E-NI
Download the CAD
22
(.87)
15.5
(.61)
6.5
(.26)
13
(.51)
.06
(.002)
187.4-27-48-E-NI
Download the CAD
187.4-27-60-E-NI
Download the CAD
27
(1.06)
19.5
(.77)
7.5
(.30)
15
(.59)
.07
(.003)
187.4-32-48-E-NI
Download the CAD
187.4-32-60-E-NI
Download the CAD
32
(1.26)
23.5
(.93)
9
(.35)
18
(.71)
.09
(.004)
187.4-40-48-E-NI
Download the CAD
187.4-40-60-E-NI
Download the CAD
40
(1.57)
30
(1.18)
11.5
(.45)
23
(.91)
1.3
(.051)