ZAGO Oversized Socket Cap Seal Screws provide strength, precision and leak-proof sealing for high-performance applications. The oversized socket cap head provides strong, stable tool engagement that is ideal for high-stress and high-load assemblies where security and control are essential.
Under the head, each screw features an elastomeric O-ring that fits into a specially designed groove. Once installed, the O-ring compresses to fill that groove, forming a 360-degree airtight and liquid-tight seal. This barrier prevents contaminants such as water, oil, gas, chemicals, dust and moisture from entering or escaping sensitive equipment, protecting both system integrity and the surrounding environment.
This unified design eliminates the need for secondary washers, gaskets, and sealants, reducing assembly time, lowering total part count, and improving long-term reliability.
Oversized head fasteners increase the load-bearing surface, distributing clamp force over a wider area. This reduces localized stress on thin or soft materials and helps prevent deformation, cracking or pull-through. It also improves stability across uneven or rough surfaces, where standard heads may concentrate load in smaller contact zones.
Increased surface area also supports more consistent compression of sealing elements, such as ZAGO’s O-rings. By allowing for more uniform compression of the sealing element without excessive torque, oversized head designs help reduce the risk of thread stripping, over tightening, and material damage.
All components are fully customizable (see detail below) and engineered-to-order to ensure optimal performance. ZAGO’s team of US-based engineers is available to share their expertise and help make the best choice for your application.
Feature | Detail |
|---|---|
Drive Style | Allen aka socket cap |
Head Type | Oversized head enhances stability |
Seal Type | O-ring under head, 360° sealing |
Reusability | Yes (seal maintains integrity over multiple assemblies) |
Material Options | 18-8 Stainless Steel, Carbon Steel, AIA 316 Stainless Steel, Titanium, Brass, Aluminum; custom materials available on request (see detail) |
O-Ring Options | Silicone, Buna, Fluorosilicone, Viton® (FKM), EPDM, Neoprene, FDA APP (see detail) |
Temperature Range | Varies by O-Ring material (see detail) |
Compliance | REACH / RoHS / DFARS (upon request) |
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Parameter | Options |
|---|---|
Thread Sizes | M1.6-M12 and 0-80-1/2" |
Thread Type | UNC / UNF / Metric Coarse / Metric Fine |
Lengths | From 3mm (1/8") to TK 50mm (2") standard; custom lengths available |
Plating/Coatings | Black oxide, zinc, black zinc, cadmium |
Torque Specs | Available by size/material request |
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