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STP21A0350180S
Screw for Plastic
STP21A 3.5x18.0 - Z2
steel, hardened
zinc-plated 5-7 µm, baked, blue / transparent passivated

identical to WN1411 / KN1031
similar to WN1441
Item Number STP21A0350180S
Standard KN1031
Material steel, hardened
Surface zinc-plated 5-7 µm, baked, blue / transparent passivated
Thread Outside-Ø d1 3.50+0.18 mm
Thread Core-Ø d2 1.91 mm
Thread Pitch p 1.57 mm
Length L 18.00±0.55 mm
Head-Ø D 7.00-0.36 mm
Head Height K 2.400±0.125 mm
Flange Thickness S 0.80 mm
Thread Run-Out X 1.80 mm
Radius R 0.35 mm
Size Cross Recess Z2
Penetration Depth t 1.08 - 1.54 mm
Thread STS
Weight 1.026 kg / 1000 pieces
Add item to cart
Stock level 0 pcs.
minimum order quantity 7,000 pcs.
Lead time 10 weeks
Quantity pcs.
Unit Price from 0.02740 $
excl. shipping and tax
Quantity discounts
Quantity Price each
from 1 $ 1.37000
from 10 $ 0.68000
from 20 $ 0.55000
from 50 $ 0.42000
from 100 $ 0.34400
from 200 $ 0.28100
from 300 $ 0.25000
from 400 $ 0.23100
from 500 $ 0.21600
from 1,000 $ 0.17800
from 2,000 $ 0.13800
from 3,000 $ 0.11900
from 4,000 $ 0.10700
from 5,000 $ 0.09920
from 6,000 $ 0.09320
from 7,000 $ 0.08840
from 8,000 $ 0.08450
from 9,000 $ 0.08130
from 10,000 $ 0.07850
from 11,000 $ 0.07490
from 12,000 $ 0.07150
from 13,000 $ 0.06830
from 14,000 $ 0.06530
from 15,000 $ 0.06240
from 16,000 $ 0.05980
from 17,000 $ 0.05720
from 18,000 $ 0.05490
from 19,000 $ 0.05260
from 20,000 $ 0.05050
from 22,000 $ 0.04780
from 24,000 $ 0.04550
from 26,000 $ 0.04360
from 28,000 $ 0.04190
from 30,000 $ 0.04040
from 32,000 $ 0.03910
from 34,000 $ 0.03800
from 36,000 $ 0.03690
from 38,000 $ 0.03600
from 40,000 $ 0.03510
from 42,000 $ 0.03440
from 44,000 $ 0.03360
from 46,000 $ 0.03300
from 48,000 $ 0.03240
from 50,000 $ 0.03180
from 55,000 $ 0.03060
from 60,000 $ 0.02970
from 160,000 $ 0.02910
from 170,000 $ 0.02860
from 180,000 $ 0.02820
from 190,000 $ 0.02780
from 200,000 $ 0.02740
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Erik Braam
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