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APM Hexseal invented and patented pre-assembled

self-sealing fasteners designed to provide both fastening

and sealing integrity in a single unit. Our design features

a resilient O-ring held captive in a precision engineered

groove under the fastener head. This combination of

precise groove geometry and O-ring characteristics

results in an absolute seal regardless of surface finish,

while still providing full metal-to-metal contact.

Vibration-resistant and re-usable, SEELSKREWS?,

SEELBOLTS?, and SEELRIVETS? can withstand

internal/external pressures up to 20,000 psig/vacuum at

temperatures from -100°F to +500°F (-73°C to +260°C).

Made in the U.S.A., APM self-sealing & optional selflocking

fasteners are available in standard and metric

sizes in a wide choice of head and fastening types

including thread forming, and tamper-resistant. Typically,

they are furnished in stainless steel/with different finishes

or colors as may be required. All have pre mounted

silicone rubber O-rings. Other elastomeric materials are

also available to match and handle exposure to various

chemicals and solvents (see materials table 1 on page 5).

Consult factory for further information and pricing.

They represent a superior sealing alternative to

sealing compounds, tape, chemical coatings, and

deformable washers that attempt to seal the threadform.

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