Name: Hex Washer Head Buttress Thread Type 17 Self Tapping Screw With EPDM Washer
Rating: 5 (99 reviews)

Specification: 14#-13*3"

Material: SUS410

Surface Treatment: Brightening

Product Introduction

The Hex Washer Head Buttress Thread Type 17 Self-Tapping Screw With EPDM Washer is designed for heavy-duty metal fastening applications requiring enhanced sealing and secure thread engagement. The hex washer head combines high torque transmission with an integrated washer that eliminates the need for a separate washer, providing accurate load distribution across the bearing surface. The Type 17 buttress thread design features a specialized thread profile that provides improved engagement in metal substrates, reducing driving torque while maintaining pull-out resistance. The EPDM washer creates a watertight seal that prevents moisture ingress through the fastener penetration point. Manufactured from SUS410 stainless steel with brightening surface treatment, this screw provides hardness for metal fastening with an aesthetic bright finish. The 14#-13 thread specification with 3-inch length offers extended engagement for structural connections and heavy-duty metal assemblies requiring weatherproof sealing.

Core Advantages

Hex Washer Head Design

Combines high torque transmission with integrated washer for accurate load distribution without separate washer requirement.

Type 17 Buttress Thread

Specialized thread profile provides improved engagement with reduced driving torque while maintaining pull-out resistance.

EPDM Washer Integration

Integrated sealing washer creates a watertight seal that prevents moisture ingress through the fastener penetration point.

Self-Tapping Thread

Cuts mating threads in pre-drilled holes, providing secure engagement without requiring a separate tapping operation.

SUS410 Stainless Steel

Provides hardness for metal fastening applications with corrosion resistance for demanding environments.

Extended Length

3-inch length provides extended engagement for structural connections and heavy-duty metal assemblies.

Product Features

Hex washer head configuration Combines high torque transmission capability with integrated washer for accurate load distribution without separate washer requirement.

Type 17 buttress thread design Specialized thread profile provides improved engagement in metal substrates, reducing driving torque while maintaining pull-out resistance.

EPDM washer integration Integrated sealing washer creates a watertight seal preventing moisture ingress through the fastener penetration point for weatherproof connections.

Self-tapping thread Cuts mating threads in pre-drilled holes, providing secure engagement without requiring a separate tapping operation.

SUS410 stainless steel material Provides hardness for metal fastening applications with corrosion resistance for demanding environments.

Brightening surface treatment Aesthetic bright finish with enhanced surface smoothness and improved corrosion resistance.

14#-13 thread specification Imperial thread configuration provides consistent performance for structural connections and heavy-duty metal assemblies.

3-inch length Extended length provides engagement for structural connections and heavy-duty metal assemblies.

Application Scenarios

Roofing systems

Metal building cladding

Weatherproof enclosures

Structural steel connections

Outdoor metal assemblies

Heavy equipment mounting

Industrial roofing

Bridge and infrastructure

This hex washer head self-tapping screw with Type 17 buttress thread and EPDM washer is deployed in heavy-duty outdoor and weather-exposed metal fastening applications requiring enhanced sealing and secure thread engagement. Applications include roofing systems where weatherproof connections are essential, metal building cladding and enclosures, structural steel connections, outdoor metal assemblies, heavy equipment mounting, industrial roofing, and bridge and infrastructure projects where the Type 17 thread provides efficient engagement, the EPDM washer offers sealing, and the extended length enables through-thickness fastening.

Common Questions and Solutions

What is the Type 17 buttress thread and what are its benefits?

The Type 17 buttress thread features a specialized thread profile with a flat driving face and angled back face. This design provides improved engagement in metal substrates, reducing driving torque during installation while maintaining pull-out resistance and holding power in structural applications.

What is the function of the EPDM washer?

The EPDM (ethylene propylene diene monomer) washer provides a watertight seal between the fastener head and the workpiece surface. This prevents moisture ingress through the fastener penetration point, making it suitable for outdoor and weather-exposed applications requiring weatherproof connections.

What is the recommended pilot hole size for this screw?

The pilot hole size for the 14#-13 self-tapping screw varies based on material thickness and hardness. Refer to the technical datasheet for recommended pilot hole diameter to ensure proper thread engagement and prevent material damage or thread stripping.

What material thickness can the 14#-13*3" screw accommodate?

The 14#-13 specification with 3-inch length provides engagement for thicker material assemblies and structural connections. The actual maximum material thickness depends on the thread length and substrate hardness. Consult the technical datasheet for specific thickness recommendations.

What is the recommended installation speed for this screw?

Install at controlled speeds to prevent thread galling and ensure proper thread formation. The Type 17 buttress thread is designed for efficient engagement; use torque-controlled drivers to prevent over-tightening when the EPDM washer compresses against the workpiece surface without distorting the washer or sealing performance.

Is this screw suitable for outdoor applications?

Yes. The SUS410 stainless steel material combined with EPDM washer provides corrosion resistance and weatherproof sealing for outdoor applications. The Type 17 thread provides efficient engagement in structural steel, and the brightening finish offers aesthetic appearance.

Installation Considerations

Select the correct hex socket size for the washer head to prevent rounding and ensure positive torque transmission during installation.

Drill pilot holes to the recommended diameter for the 14#-13 thread size and material thickness to ensure proper thread engagement for the Type 17 buttress thread.

Use torque-controlled installation tools to prevent over-driving. The EPDM washer should seal against the workpiece surface without being over-compressed or damaged.

Apply appropriate spindle speed to prevent thread galling; the Type 17 thread design allows efficient engagement at controlled speeds.

Ensure perpendicular alignment between screw axis and workpiece surface to prevent cross-threading and ensure proper sealing of the EPDM washer.

The brightening treatment provides aesthetic and corrosion protection. Handle screws with clean gloves to maintain surface appearance and prevent contamination.