Coatings are used on fasteners to improve their performance, while also increasing their longevity and improving their resistance to corrosion. One such method of improving the fastener’s performance is by using dacromet finish bolts in any given application. An inorganic material, the production of Dacromet is made by melting zinc and aluminum flakes. The flakes are connected by chromate. Most dacromet coated fasteners suppliers recommend the use of this inorganic finish simply because of the material, which acts firmly because of its adhesive nature.
The use of dacromet coated bolts is considered to be ideal for applications that have high corrosion resistance requirements. Since the finish is an adhesive layer, dacromet coated stud bolts are known to have a thin layer, in terms of their thicknesses. This is why this coating is used in the automotive industry, especially because the fastener is used to hold various elements in place. Another characteristic of the dacromet coated screws is that the coating exhibits good heat resistance while offering a low friction coefficient.
The danger of hydrogen embrittlement does not exist. The dacromet coating process takes place in an aqueous media, where the application of the layer takes place with the dispersion of chromate zinc flakes in an aqueous dip-spin process. The coated layer is then dried, followed by subsequent burning at a temperature of 300 °C. The Dacromet® Coated Fasteners also exhibit superior resistance to mechanical damage.
| Standard | IS, ANSI, ASTM DIN, ISO, JIS, GB, ASME, BS, UNI and all International Standards |
|---|---|
| Threads: | BSF, UNF METRIC, UNC, BSW or as required |
| Standard | ANSI – American National Standards Institute
DIN:DIN 933, DIN 931, DIN 970, DIN 934 UTS – Unified Thread Standard : UNF, NPT, NPTF, UNS, UNC, UNEF ISO – International Organization for Standardization ISO 4033, : ISO 4032, JIS standards |
| Fasteners/ Bolts Size | M10, M4, M16, M36 M2.5, M6, M30, M12, M8, M14, M2, M3, M20, M24, M5 to M160 |
| Length | 3 mm to 200 mm |
| Head drive: | Phillips, Slotted, Phillips/Slot, Six-Lobe etc |
| Test Certificate | as per EN 10204 / 3.1 Manufacturer Test Certificate |
| Finishing | Zinc white, (yellow, black, blue), black oxide,
Dacroment, Geometry, plated zinc-nickel, anodizing, nickel plated, Stainless steel: Passivated Self-Colour, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Sherardized, Stainless Steel, some special one like DACROMET and Mechanically Applied coating |
| raw materials of Source | JSPL, Usha Martin, Tata Steel, Mukund Steel, RINL, Dhamm Steel etc. |
| Form | Square, Hex, Threading as per Gauge, Round Etc. |
| Process of Production | M2-M24: Cold Froging, hot forging M24-M100, machining and CNC for Customized connecting element |
| Surface Coating |
|
| Packing | IN BULK: pallet, canton, carton / Small Boxs / pallet or customer request |
| Sr. No. | Size (mm) | Drill Point | Drilling Capacity (mm) | Pcs / Box | Pcs / Carton |
| 1 | 5.5 x 14 x 25 | #4 | 6 | 500 | 2000 |
| 2 | 5.5 x 14 x 35 | 400 | 1600 | ||
| 3 | 5.5 x 14 x 45 | #5 | 8 | 350 | 1400 |
| 4 | 5.5 x 14 x 55 | 250 | 1000 | ||
| 5 | 5.5 x 14 x 68 | 200 | 800 |
| Sr. No. |
Size (mm) | Drill Point | Drilling Capacity (mm) | Pcs / Box | Pcs / Carton |
| 1 | 5.5 x 24 x 25 | #4 | 6 | 500 | 4000 |
| 2 | 5.5 x 24 x 38 | 400 | 1600 | ||
| 3 | 5.5 x 24 x 55 | #5 | 8 | 250 | 1000 |
| 4 | 5.5 x 24 x 60 | 200 | 1600 | ||
| 5 | 5.5 x 24 x 65 | 200 | 800 |
| Temperatures Range | 800 F (426 C) |
