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Screws for Plastic -
Washer head with PH-drive

STP31A
Washer head with PH-drive

identical to WN1411 / KN1031
similar to WN1441
Washer head with PH-drive, WN1411, STP31A
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Range of Production Dimensions

Range of Production top

nominal-Ø (mm) 2.00 2.20 2.50 3.00 3.50 4.00 5.00 6.00
  • in Stock
  • available within 2 weeks
  • ≥ 4 weeks delivery time
Length (mm)
4.0
E S
4.5
E S
E S
5.0
E S
E S
E S
S
6.0
E S
E S
E S
B E S
7.0
E S
S
E S
B E S
E S
8.0
E S
E S
E S
B E S
E S
B E S
10.0
E S
E S
E S
B E S
E S
B E S
E S
12.0
E S
E S
E S
B E S
E S
B E S
E S
E S
14.0
E S
E S
E S
B E S
E S
B E S
E S
E S
16.0
E S
E S
E S
B E S
E S
B E S
B E S
E S
18.0
E S
E S
E S
B E S
E S
B E S
E S
E S
20.0
E S
E S
E S
B E S
E S
B E S
C E S
E S
22.0
E S
E S
E S
E S
E S
B E S
E S
E S
25.0
E S
E S
E S
E S
B E S
B E S
E S
30.0
E S
E S
E S
B E S
E S
E S
35.0
E S
E S
B E S
E S
E S
40.0
E S
E S
E S
E S
E S
45.0
E S
E S
E S
50.0
E S
E S
E S
55.0
E S
E S
60.0
E S
E S
65.0
E S
70.0
E S
Hint
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Dimensions top

STP31A
d1 2.00 +0.14 2.20 +0.14 2.50 +0.14 3.00 +0.14 3.50 +0.18 4.00 +0.18 5.00 +0.18 6.00 +0.18
d2 1.15 1.25 1.40 1.66 1.91 2.17 2.68 3.19
p 0.89 0.98 1.12 1.34 1.57 1.79 2.24 2.69
D 4.00 -0.30 4.40 -0.30 5.00 -0.30 6.00 -0.30 7.00 -0.36 8.00 -0.36 10.00 -0.36 12.00 -0.43
K 1.400 ±0.125 1.600 ±0.125 1.800 ±0.125 2.100 ±0.125 2.400 ±0.125 2.500 ±0.125 3.200 ±0.150 4.000 ±0.150
S 0.50 0.50 0.60 0.70 0.80 0.90 1.10 1.30
X 1.00 1.10 1.30 1.50 1.80 2.00 2.50 3.00
R 0.25 0.25 0.30 0.35 0.35 0.40 0.45 0.60
Drive H1 H1 H1 H1 H2 H2 H2 H3
t 0.51 - 0.97 0.68 - 1.14 0.82 - 1.28 1.15 - 1.61 1.07 - 1.70 1.33 - 1.96 1.98 - 2.61 2.24 - 2.90