Seal screw
APM HEXSEAL

The APM SEELBOLT® is the original self-sealing bolt designed and patented by APM. The APM line of self-sealing bolts, screws, and nuts are designed to seal out air, water, lubricants and other liquid or gaseous contaminants. Our self-sealing bolts and screws are available in many standard thread sizes and with optional O-ring sealing materials. Self-sealing bolts and screws can also be supplied with either self-locking pellets, strips or patch, Black oxide, painted heads, or in a captivated (KAPTO-SKREW®) configuration. Sheet metal and other type fasteners available on special order.

APM's patented, pre-assembled self-sealing bolts and screws provide both fastening and sealing integrity in a single unit. Unique design features a resilient silicone O-ring held captive in a precision engineered groove under the head. Vibration-resistant and reusable bolts, screws and nuts withstand internal and external pressures/vacuum to 20,000 psig (137,895kPa). When vibration is an issue, APM offers a full line of self-locking add-ons (pellets, strips, patches).