| 摘要 |
It is an object of the present invention to solve the disadvantages such as high cost, variations in dimension, complicated treatment of cutting chips, low productivity, long manufacturing process, collapse of nipple, oil leak, and the like in the conventional process for making hose couplings. The hose coupling intermediate of the present invention comprising a main body portion 22 constituting a head portion 4, a recessed portion formed in the main body portion 22, a tubular portion 26 formed integrally with the main portion 22, and a projected portion 24 within the tubular portion 26. |
