SEELSKREWS® Pan Head, Recessed Phillips Drive are designed to seal out air, water, lubricants and other liquid or gaseous contaminants. SEELSKREWS® are available in many standard thread sizes and with optional sealing materials. They can also be supplied with either self-locking pellets, strips or patch, a black oxide, painted heads, or in a captivated (KAPTO-SKREW®) configuration.SEELSKREWS® Pan Head, Recessed Phillips Drive are designed to seal out air, water, lubricants and other liquid or gaseous contaminants. SEELSKREWS® are available in many standard thread sizes and with optional sealing materials. They can also be supplied with either self-locking pellets, strips or patch, a black oxide, painted heads, or in a captivated (KAPTO-SKREW®) configuration.