Product Center · Sealing Series

Multifunctional Sealing & Anti-Loosening Screw with Pre-Applied Adhesive and O-Ring

The same multifunctional screw shown in the sealing range, where the pre-applied sealant and the O-ring are specified as two separate barriers.

Key specifications

MaterialStainless Steel / Brass
Installationthreaded in, coating filling the clearance
StandardGB/T 197, GB/T 4208 (IP rating)
Typical substratehousing threads and end caps
Key inspectionsleak tightness, coating coverage, prevailing torque

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Product overviewOverview

A pre-applied sealant targets the thread clearance. Thread sealing and face sealing are independent: the sealant fills the helical clearance, while the O-ring is compressed against the bearing face to form a face seal. With only one of the two, that barrier becomes the single point of failure.

Material: Stainless Steel / Brass. It is threaded in so the coating fills the thread clearance.

Key featuresFeatures

Thread seal and face seal are separate, redundant barriers.
Several sealant grades for coolants, oils and gases.
Stainless or nickel-plated steel for housing and end-cap joints.
Coating fills the helical thread clearance, blocking weepage along the thread.

Typical applicationsApplications

Outdoor equipment junction cavities
Engine and gearbox housing threads
EV drive unit housings

Selection notesSelection

Choose the sealant by medium: anaerobic for metal threads, silicone for plastics and high temperature. Choose O-ring hardness by pressure, softer for low pressure to limit compression set.

Frequently asked questionsFAQ

Is an O-ring still needed if the thread is coated?

It depends on the sealing class. The coating closes the thread clearance but not the micro-unevenness of the bearing face; above IP67, or where pressure is present, an O-ring is added as the second barrier.

What matters during installation of the Multifunctional Sealing & Anti-Loosening Screw?

Thread it in so the coating fills the thread clearance. Thread seal and face seal are separate, redundant barriers.

Specifications

Material	Stainless Steel / Brass
Sealing Method	Pre-applied sealant / O-ring
Standard	GB/T 197, GB/T 4208 (IP rating)
Installation	threaded in, coating filling the clearance
Typical substrate	housing threads and end caps
Key inspections	leak tightness, coating coverage, prevailing torque

Manufacturing and inspection

Pressure test at 1.5 times working pressure, watching for decay or seepage.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.