Audited Supplier
Metric Standard M8-1.25x20mm Grade 8.8 Steel Hex Flange Head Silo Bolt
Pre-Assembly with EPDM or HDPE Flat Washers
Compatiable with Hex Flange Nut (Class 8, to be ordered seperately)
White or Yellow Zinc at same price!
| Thread Standard | M8-1.25 ISO 6g |
| Bolt Length | 20mm (under head), more lengths options |
| Surface | Zinc Plating+Sealant (500Hrs Salt Spray Test no Rust) |
Related agriculture storages that need high strength, long last and good sealing features.
The hex head with a curved collar design is to fit a HDPE or EPDM washers.
Bolt size M8x20, pre-assemblied with HDPE (or EPDM) flat washer)
1,000pcs per Carton (Factory's Standard packing)
Zinc galvanized (Bichromate plus sealant coatings)
ANTI-CORROSION features up to 500 hours without red rust after NSS test.
Compatiable with Hex Nut DIN934 or Flange Nut DIN6923
Prices hereby not including any nut (please order seperately)
Plese note we offer various surface finishes to meet all customers' need or industrial standards. Please tell us your choice on the followings,
Electric zinc galvanizing with trivalent chromate conversion (blue/white or yellow converter).
Anti-Corrosion Quality from 96hrs up to 240hrs pass Neutral Salt Spray Test without Red Rust!
Coating thickness around 8~20Um.
Trivalent chromate conversion with yellow converter is one of a variety of chromate conversion coatings available for use on Eberhard parts. Chromate conversion coatings are produced on various metals through chemical or electrochemical treatment with mixtures of trivalent chromate conversion and certain other compounds. Through these treatments, the metal surface is converted to a superficial layer containing a complex mixture of trivalent chromate conversion compounds. Thickness from 12~20micro
Various Zinc Flake Coating, Organic Coatings & Mechanical Coatings
Its a kind of non-electric zinc alloy coating which is enviroment-friendly. The coating layer thickness usually from 12um up to 25umi. Mostly zinc_aluminium coating, zinc_nickle coatings with an extra baked film layer. High anti-corrosin features, from 500 up to 2000 hours neutral salt spray test with our red rust. Transhow have long experience on Anti-Corrosion treatment, we carry on netural salt spray test all the times.
Please see our below photos for various coating surface. Please inform us your demands as to suggest you the best choice. Cost various on different coating qualities!
Color can be blue/white, yellow/color, grey, silver, black or green
Transhow, not only a fastener manufacturer & exporter, but world wide supplier, stockist, we produce and supply a wide range of hexagon bolt, hex flange screw and related bolts nuts. For most of the standard fasteners and regular sizes we have in_stock that support us fast delivery. We can also offer OEM, design and produce customized fasteners. 
