Products

Product Categories

Washers
Spring and knurled washers

RZB
Knurled washers

Knurled washers RZB – standard version -  are suitable for screw / bolt grade up to 8.8.
Their particular conical shape with milling on both bearing surfaces provides an excellent screw clumping.

Download technical data sheet
Scheda prodotto - RZB
SIZE WASHER DIMENSIONS SUPPLEMENTARY DATA WEIGHT
screw
mm
d1
H14
tol
d2 h14
tol
s
h
max
Load test
Torsion torque
(Nm)
Kg/1000
2,5 2,70 0,250 0 4,80 0 -0,300 0,45 0,85            0,81   0,035
3 3,20 0,300 0 5,50 0 -0,300 0,45 0,85            1,40   0,045
4 4,30 0,300 0 7,00 0 -0,360 0,50 0,95            3,30   0,080
5 5,30 0,300 0 9,00 0 -0,360 0,60 1,05            6,70   0,150
6 6,40 0,360 0 10,00 0 -0,360 0,60 1,15          11,20   0,216
*6,35 - 1/4" 6,70 0,360 0 9,50 0 -0,360 0,60 1,15   0,150
7 7,40 0,360 0 12,00 0 -0,430 0,70 1,25          18,00   0,310
8 8,40 0,360 0 13,00 0 -0,430 0,70 1,35          27,00   0,400
10 10,50 0,430 0 16,00 0 -0,430 0,90 1,55          53,00   0,760
11 - 7/16" 11,60 0,430 0 15,90 0 -0,430 0,90 1,55   0,611
12 13,00 0,430 0 18,00 0 -0,430 1,00 1,65          93,00   0,860
*12,7 - 1/2" 13,70 0,430 0 19,00 0 -0,520 1,00 1,75   0,976
14 15,00 0,430 0 22,00 0 -0,520 1,10 1,95        145,00   1,706
16 17,00 0,430 0 24,00 0 -0,520 1,30 2,05        230,00   1,960
18 19,00 0,520 0 27,00 0 -0,520 1,40 2,25        310,00   2,721
*19 - 3/4" 20,00 0,520 0 30,00 0 -0,520 1,40 2,45   4,100
20 21,00 0,520 0 30,00 0 -0,520 1,40 2,45        440,00   3,630
*22 - 7/8" 23,00 0,520 0 33,00 0 -0,620 1,40 2,65   4,507
24 25,60 0,520 0 36,00 0 -0,620 1,60 2,85        770,00   6,120
*25,4 - 1" 27,00 0,520 0 38,00 0 -0,620 1,80 3,05   7,449
*27 28,60 0,520 0 39,00 0 -0,620 1,80 3,05   7,369
30 31,60 0,620 0 45,00 0 -0,620 1,80 3,55    1.550,00   11,070
Dimensions in mm
* Non standard size on request 
View technical data

Materials used

discover

Spring steel EN 10132 - 1/4 (DIN 17222)
Ø from 2,5 to 30 mm: strip C60S (C60)

Austenitic stainless steel A2 – AISI 304 (W.N. 1.4301)
Ø from 2,5 to 30 mm: strip

Hardness

Spring steel EN 10132 - 1/4 (DIN 17222)
Ø from 2,5 to 30 mm: HV 430 ÷ 526, HRC 44 ÷ 50

Austenitic stainless steel A2 – AISI 304 (W.N. 1.4301)
Ø from 2,5 to 30 mm: resistance 70 ÷ 80 Kg/mm²

Standard surface finish

discover

Ø from 2,5 to 30 mm: phosphated and oiled
Ø from 2,5 to 30 mm: mechanical zinc plating

Packaging

discover

Ø from 2,5 to 30 mm: loose in boxes

Additional information

Packaging on request
Upon request and for quantities / prices to be established, knurled washers RZB can be supplied in bulk packaging.