... hydraulic industry and etc.1. Material Available: Copper, Brass, Aluminum, Stainless Steel, Steel alloy, etc.2. Specification: OEM, according to customers ... : Plating, anodizing, black oxide etc.7. QC 1) Technicians self-check in production 2) Engineer spot check in production 3 ... can call us at:Tel: 86-757-26385090 TM: changzedianqi Stainless Steel Self-Clinching Studs, Flush-Head Self-Clinching Studs