The Kirby Morgan 530-099 Cover Retainer Screw for the 455 Regulator Assembly is compatible with the following:
- Kirby Morgan Diamond Helmet w/Posts P/N: 500-710
- Kirby Morgan Diamond Helmet w/MWPC P/N: 500-711
- Kirby Morgan 97 Commercial Diving Helmet with Posts P/N: 500-700
- Kirby Morgan 97 Commercial Diving Helmet with Male Waterproof Connectors P/N: 500-701
- Kirby Morgan 455 Regulator Cover Retainer Assembly P/N: 505-086
- Kirby Morgan Regulator Cover Assembly P/N: 505-373
- Kirby Morgan Water Shroud Kit for KM 97 P/N: 525-761
- Kirby Morgan (525-756) 455 Balanced regulator P/N: 505-455
