DIN 436 Metal Stamping Parts Flat Stainless Steel Square Washers
Sizes M8 - M55
Stamped square washer with flat profile and blank hole in the
middle for threaded screw or bolt assembly , the width for each
side of square washer are same , usually , the width of square
washer is more bigger than head diameter of screw or bolt , square
washer provides more frictions when it is installed on material ,
this lets screw or bolt to secure material well .
Standard sizes for square washers are from 9 to 58 ( hole diameter
) which available for thread M8 to M55 as following shows , we are
capable of manufacturing more smaller and bigger customized sizes .
| d1 | a | s | Screw M |
| 9 | 18 | 2 | 8 |
| 11 | 30 | 3 | 10 |
| 13.5 | 40 | 4 | 12 |
| 17.5 | 50 | 5 | 16 |
| 22 | 60 | 5 | 20 |
| 24 | 70 | 6 | 22 |
| 26 | 80 | 6 | 24 |
| 30 | 90 | 6 | 27 |
| 33 | 95 | 6 | 30 |
| 36 | 10 | 6 | 35 |
| 39 | 110 | 8 | 38 |
| 42 | 125 | 8 | 41 |
| 45 | 135 | 8 | 44 |
| 48 | 140 | 8 | 47 |
| 52 | 150 | 10 | 51 |
| 58 | 160 | 10 | 55 |
Stamped square washers normally are made of carbon steel with grade
4.8 that suitable for grade 4.8 to 8.8 screws or bolts .
Tensile strength(σb/MPa ): 410
Density g/cm^3 : 7.85
Yiled strength N/mm2 : 365
Hardness HV : 150
Reduction of area Z ( % ) : 41
Stamped square washers are available for different finish to apply
for various applications .
Zinc
The most popular plating for the most products
Bright and smooth
Resistant corrosion
Nickel
The film thickness is 1～3μm , it improves brightness and wear
resistance
Polishing
Reduce roughness of parts and improve brightness .
Tin
With film thickness 0.13～1.27μm , tin finish with bright surface
and good ductility ,corrosion resistance ,lower melting point
,eco-friendly features .
Brass
Usually, 5gm～8gm finish coating thickness and with good
dispersibility ,Bright appearance .
Dacromet
This finish is grey color with High corrosion resistance , No
hydrogen embrittlement ,Heat resistance ,Easy to plated more
,eco-friendly etc charictersitics and the film thickness is 4-8μm .
Chrome
Chrome finish is silver white color and the thickness of film is
0．25～0．5μm normally . chrome finish has many practical Features
- Bright appearance
- Wear resistance
- Corrosion resistance
- Hard plating film
- Heat resistance
Stamped square washers are packed in boxes for convenient shipment
, customized packages are available .
| d1 | a | s | Pcs / box |
| 9 | 18 | 2 | 200 |
| 11 | 30 | 3 | 200 |
| 13.5 | 40 | 4 | 200 |
| 17.5 | 50 | 5 | 150 |
| 22 | 60 | 5 | 150 |
| 24 | 70 | 6 | 150 |
| 26 | 80 | 6 | 150 |
| 30 | 90 | 6 | 150 |
| 33 | 95 | 6 | 150 |
| 36 | 10 | 6 | 150 |
| 39 | 110 | 8 | 100 |
| 42 | 125 | 8 | 100 |
| 45 | 135 | 8 | 50 |
| 48 | 140 | 8 | 50 |
| 52 | 150 | 10 | 50 |
| 58 | 160 | 10 | 50 |
