The Black Diamond 10.0 mm x 1.0 mm Metric Straight Grease Fittings are engineered for dependable, high-pressure lubrication applications up to 6,000 PSI. Manufactured from steel and heat treated to SAE J534 specifications, they feature a hardened greasing end for long service life and consistent performance. Each fitting includes a ball check and heat-treated spring, while the zinc-plated finish provides corrosion resistance and meets the SAE J534 specification. Sold in a convenient 10-piece pack, these fittings are precision-controlled to ensure accurate fit, reliable sealing, and long-lasting durability.