A compression spring for automotive assemblies with a black coating, produced to customer drawings. Automotive parts are defined by their approval regime as much as by their geometry, and the reference sample is what production is measured against.
Non-standard and OEM drawings are the normal basis for automotive work here, with an approved sample held as reference.
Matches the dark hardware used through most vehicle interiors and accessory assemblies.
Magnetic powder flaw detection catches the surface cracks that cause fatigue failures in cycled automotive parts.
Reference the approved sample number on your purchase orders. It removes ambiguity when a drawing has been revised but the sample has not.
Force variation between batches failing a tier supplier's incoming check
Fatigue failures traced to surface flaws that were never inspected for
Dimensional and load figures are set per order against your drawing or sample, so they are marked TBC rather than filled with catalogue numbers.
| Product Type | Compression Springs |
|---|---|
| Raw Material Options | Stainless steel, Spring steel, Carbon steel, 65Mn, Music wire |
| Wire Diameter Range | 0.1-8 mm |
| Surface Treatment Options | Zinc plating, Nickel plating, Silver plating, Gold plating, Tin plating, Galvanizing in various colours, Dacromet, Black oxide, Phosphating |
| Standard | ISO, non-standard and OEM drawings |
| Processing Route | Material sourcing → Coiling and forming → Heat treatment → Surface treatment → Quality inspection → Packing → Shipping |
| Inspection Equipment | Grinding and shot peening machinery; Precision tensile strength testers; Magnetic powder flaw detectors |
| Packing | Plastic bags, cartons or pallets, or packing to your own specification |
| Payment Terms | L/C, T/T, D/A, D/P, Western Union, 30% deposit before production, 70% balance before shipment |
| Lead Time | 7-15 days after the order is confirmed |
| Minimum Order Quantity | Quoted per part — tell us your requirement (TBC) |
| Dimensions and Load Rating | Made to your drawing or sample (TBC per part) |
Every batch follows the same seven step route, with tensile testing and magnetic powder flaw detection carried out before packing.
Available in Stainless steel, Spring steel, Carbon steel, 65Mn, Music wire, in wire from 0.1-8 mm, with any of our nine surface finishing routes. Geometry, end treatment and finish are all specified per order.
ISO 9001, SGS certificate and RoHS report (stated on the legacy site, certificates pending re-confirmation). Certificate copies are sent on request once re-confirmed.
Against a general industrial compression spring, this part carries the same steel and a stricter approval and inspection regime. That regime is what the automotive price reflects.
Samples first, approval against your drawing, then production measured against the approved sample.
Magnetic powder flaw detection is part of our inspection route for ferrous springs.
Yes. Recorded programme settings and finishing routes are what make repeat schedules consistent.
Send your drawing, dimensions or a sample. We will confirm the specification and come back with a price and a lead time.