Solid Pure Copper Bar Stock

Straight, uncoated solid copper rod in diameters from 2mm to 50mm, manufactured to BS EN 13601 CW004A specification. Contains >99.90% Cu with controlled oxygen content (0.02–0.04%) for optimal balance of conductivity and workability. No zinc, nickel, or tin alloying — preserving pure copper behaviour in soldering, bending, and electrochemical environments. Surface is smooth, scale-free, and free from laminations or seams — verified by ultrasonic testing on batches ≥20mm diameter. Used in low-volume production of custom grounding electrodes, machined plumbing adaptors for retrofitting period properties, thermal interface shims for server rack cooling, hand-forged jewellery findings, and calibration standards for multimeter verification. Tolerances conform to ISO 286-2 h11 for diameters ≤10mm and h12 for larger sizes — ensuring interchangeability with off-the-shelf tooling and fixturing across UK workshops. Supplied dry-packed in recyclable cardboard sleeves with desiccant; full 3m lengths or customer-specified cut lengths (minimum 100mm). Mill certificates available, including chemical composition, mechanical properties, and conductivity test summary — aligned with UKCA marking guidance for construction products.