Value Added Services
Screwtool integrates additional services required for fasteners, including diverse surface treatments, secondary processing, optical sorting, quality reports, and packaging services.
Finishing & Coating
We support the following conventional surface treatments:
- Zinc Plated (CR3+)
Zinc Plated Yellow Chromate (CR6+) - Black Oxide
- Passivated (for stainless steel)
- Ruspert, Dacromet, Geomet, Doerken (SST 1000hrs,720hrs,500hrs)
- Nylon Patch (180°/360°, various standards)
- Zinc-Nickel Plated (SST 1000hrs,720hrs,500hrs)
- Nickle / Cooper / Bronze / Antique Brass Plated
- Hot Dip Galvanized / Machenical Galvanized (AS3566 C1-C4)
- Green Zinc Plated
- Head Painted (Epoxy)
- Xylan / Teflon
- Waxed
Quality Test
Mill certs and dimensional report are provided every shipment. We support the following more testing upon request:
Raw Material Certificate
- Chemical element composition
Mechanical Test
- Dimensional report
- Drilling speed test (for drilling/tapping screw)
- Case depth test
- Surface hardness test
- Case hardness test
- Salt spray test
- Torque test
- Bending angle test
- Tensile (yield/strain) test
Laboratory
- Inhouse lab
- SGS (ISO17025)
- CNAS (ISO17025)
Inhouse report are free of charge, third party such as SGS may occur fees.
Optical Sorting
Optical sorting is applied when normal rejected rate(200ppm) is not critcal enough for industrial application.
We conduct optical sorting upon customer request, the rejected rate can achieve 30-50ppm after sorting for mass production parts more then 100,000pcs.
More technical information:why need optical sorting for screws? – Shanghai Screwtool Industrial
Packaging
We support following types of packaging requirement with relatively competitive labor or machinery cost :
- Bulk packing
- Small box packing (nature, white or color)
- Kitting with sealed bag packing
- Label printing
- Shipping pallets
- Custom design available
