Windlass offers a wide range of standard and sour gas hammer unions. Each union whether standard or sour gas is carefully inspected to assure long, dependable service even under extreme conditions. Three lug nuts and self-locking ACME threads provide quick make-up and break-out are there. There are Color coded for quick identification. All unions provide pressure-tight & positive sealing for low-pressure services (1,000 to 2,000 PSI). Material used meet ASTM and/or AISI standards.