Sealing Performance Under High Pressure

APM invented and patented the first pre-assembled self-sealing fasteners designed to provide both fastening and sealing integrity in a single unit. The APM design features a resilient O-ring held captive in a precision engineered groove under the fastener head. Minimum O-ring friction and wear results in maximum reusability.

This combination of precise groove geometry and O-ring sealing characteristics results in a positive seal regardless of surface finish, by providing full 360° metal-to-metal surface contact. Re-usable and Vibration-resistant, SEELSKREWS^®, SEELRIVETS^®, SEELBOLTS^®, and SEELNUTS^® can withstand internal/external pressures up to 20,000 psig (137,895kPa)/vacuum at temperatures from –150°F to +500°F (-106°C to +260°C).

The APM one-step process eliminates the need for sealants and is available with adjustable threadlocking and tamper-resistant head versions.

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Embedded O-Ring Self-Sealing Fastener System vs. O-Ring and Washer Sealing View Comparison Chart