Hollow Knurled Screws
GN 421
Technopolymer Plastic, with Steel or Stainless Steel Threaded Stud
Inch | Metric
Inch table
1
Dimensions in: inches - millimeters
2
d1
Length l
Steel
Thread
10 x 32
d2
.375
9.5
d3
d4
h
k
.50
12.7
.75
19.1
.38
9.7
.47
11.9
.75
19.1
.54
13.7
.31
7.9
1/4 x 20
.50
12.7
.75
19.1
1.00
25.4
.47
11.9
.55
14.0
.94
23.9
.65
16.5
.37
9.4
5/16 x 18
.50
12.7
.75
19.1
1.00
25.4
.55
14.0
.63
16.0
1.18
30.0
.77
19.6
.43
10.9
Metric table
1
Dimensions in: millimeters - inches
2
d1
Length l
Thread
Steel
M 4
10
M 5
10
M 6
10
M 8
16
M 10
20
.39
.39
.39
.63
.79
d2
d3
d4
h
k
Stainless steel NI
15
15
16
20
25
.59
.59
.63
.79
.98
20
30
1.18
-
-
-
-
-
-
9
25
-
10
15
20
25
-
9
.98
30
1.18
10
.98
30
1.18
40
1.57
20
30
1.18
40
1.57
-
20
20
20
25
.79
.79
.79
25
.98
Specifi cation
3
.39
16
.39
25
.79
25
.79
.59
20
.63
.79
.79
25
.98
.98
30
1.18
12
.98
30
1.18
40
1.57
-
14
.98
30
1.18
45
1.77
55
2.17
16
.35
.35
.47
.55
.63
12
12
14
16
18
.47
.47
19
19
.75
14
14
.55
.55
8
8
.31
.31
.94
16.5
.65
.63
30
1.18
19.5
.77
11
.71
36
1.42
22.5
.89
12.5
.49
.55
24
.75
9.5
.37
.43
Information
• Plastic
Technopolymer (Polyamide PA)
- Temperature resistant up to 248 °F (120 °C)
- Black, shiny finish
On clamping operations, the partially protruding steel / stainless steel hub of the GN 421 hollow knurled
screws prevents chipping of the plastic.
• Threaded stud
- Steel, zinc plated, blue passivated finish —
- Stainless steel
NI
European Standard No. 1.4567 (AISI 304 Cu)
• Hollow Knurled Knobs GN 421.10 (with Brass / Plastic Tip)
• RoHS compliant
see also...
• Knurled Screws EN 591
• Knurled Screws EN 591.5 (Stainless Steel Threaded Stud)
• Hollow Knurled Screws GN 421 with Loss Protection GN 111.7
How to order (Steel)
1
Thread d1
GN 421-5/16X18-0.75
2
Length l
How to order (Stainless steel)
1
Thread d1
2
Length l
3
Material
1
1
2
2
3
GN 421-M6-30-NI
www.jwwinco.com | phone: 1-800-877-8351
2.2 Tensioning, Clamping with Knobs |
121
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