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STP21A0400180S
Screw for Plastic
STP21A 4.0x18.0 - Z2
steel, hardened
zinc-plated 5-7 µm, baked, blue / transparent passivated

identical to WN1411 / KN1031
similar to WN1441
Item Number STP21A0400180S
Standard KN1031
Material steel, hardened
Surface zinc-plated 5-7 µm, baked, blue / transparent passivated
Thread Outside-Ø d1 4.00+0.18 mm
Thread Core-Ø d2 2.17 mm
Thread Pitch p 1.79 mm
Length L 18.00±0.55 mm
Head-Ø D 8.00-0.36 mm
Head Height K 2.500±0.125 mm
Flange Thickness S 0.90 mm
Thread Run-Out X 2.00 mm
Radius R 0.40 mm
Size Cross Recess Z2
Penetration Depth t 1.40 - 1.86 mm
Thread STS
Weight 1.366 kg / 1000 pieces
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local stock 0 pcs.
remote stock (10 working day(s) transfer time) 7,305 pcs.
Quantity pcs.
Unit Price from 0.03090 $
excl. shipping and tax
Quantity discounts
Quantity Price each
from 1 $ 1.37000
from 10 $ 0.68000
from 20 $ 0.56000
from 50 $ 0.43000
from 100 $ 0.34700
from 200 $ 0.28400
from 300 $ 0.25300
from 400 $ 0.23300
from 500 $ 0.21900
from 1,000 $ 0.18100
from 2,000 $ 0.14000
from 3,000 $ 0.12200
from 4,000 $ 0.11000
from 5,000 $ 0.10200
from 6,000 $ 0.09600
from 7,000 $ 0.09130
from 8,000 $ 0.08740
from 9,000 $ 0.08410
from 10,000 $ 0.08130
from 11,000 $ 0.07770
from 12,000 $ 0.07430
from 13,000 $ 0.07110
from 14,000 $ 0.06810
from 15,000 $ 0.06530
from 16,000 $ 0.06260
from 17,000 $ 0.06010
from 18,000 $ 0.05770
from 19,000 $ 0.05550
from 20,000 $ 0.05340
from 22,000 $ 0.05070
from 24,000 $ 0.04840
from 26,000 $ 0.04640
from 28,000 $ 0.04480
from 30,000 $ 0.04330
from 32,000 $ 0.04200
from 34,000 $ 0.04080
from 36,000 $ 0.03980
from 38,000 $ 0.03880
from 40,000 $ 0.03800
from 42,000 $ 0.03720
from 44,000 $ 0.03650
from 46,000 $ 0.03580
from 48,000 $ 0.03520
from 50,000 $ 0.03490
from 130,000 $ 0.03410
from 140,000 $ 0.03340
from 150,000 $ 0.03290
from 160,000 $ 0.03240
from 170,000 $ 0.03190
from 180,000 $ 0.03160
from 190,000 $ 0.03120
from 200,000 $ 0.03090
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