Kenji sighed. He wasn't worried about the seals or the springs. He was worried about the housing. The casing had cracked, and he had managed to salvage it by machining a new flange, but he needed to bolt it back together with precision. If the torque was off, the pressure would blow the seals out within an hour of operation. If the bolts were too tight, the cast iron would spiderweb with new cracks.
The defining characteristic of a JIS B 1188 screw is its "captive" nature. These fasteners are manufactured by mounting a washer onto the screw blank before the threads are rolled; this ensures the washer is permanently attached and cannot fall off. The standard typically covers several assembly types: jis b 1188 pdf
JIS B 1188 PDF can be obtained from various sources, including: Kenji sighed
