Secure Shoulder Sealing DIN 910 316 Stainless Steel Hexagon Hex Head Screw Plugs with Collar

Product Overview

Our DIN 910 screw plugs are precision-manufactured hexagon head fasteners with a collar, featuring secure shoulder sealing for reliable leak prevention. Crafted from 316 stainless steel, they offer exceptional corrosion resistance and durability, making them suitable for harsh industrial environments. Designed in compliance with DIN 910-2020 standard, these plugs ensure perfect compatibility and stable performance in pressure-containing systems.

Product Specifications

Material: 316 stainless steel, containing 16-18% chromium, 10-14% nickel, and 2-3% molybdenum for superior pitting and crevice corrosion resistance, ideal for marine and corrosive settings. Thread Standard: Parallel (straight) pipe threads conforming to DIN EN ISO 228-1, with right-hand rotation and 55° thread angle. Head Type: External hexagon head for easy installation with a wrench, enabling higher tightening torque. Collar Design: Integrated collar provides a larger bearing surface, ensuring flush fit with mating surfaces and enhancing sealing stability.

Key Dimensions (Typical for G1/4A): Head diameter 17.57-18mm, across flats width 12.57-13mm, head height 5.76-6.24mm, total length 21mm, thread pitch 1.337mm, and shoulder height 3-3.5mm. Surface Finish: Bright polished for smooth surface and improved corrosion resistance. Performance Grade: A4L, with mechanical strength ranging from 500-700MPa, complying with GB/T3098.6 standard.

Application Scope

Widely used in sealing cylindrical threaded holes of pipes, machinery, and fittings to prevent leakage of air, steam, gases, water, oil, and other fluids under pressure. Suitable for multiple industries including marine (ships, offshore platforms), chemical processing (reaction vessels, pipelines), petroleum (oil transmission systems), food processing (aseptic equipment), pharmaceuticals (drug delivery pipelines), automotive (engine blocks, water pumps), and sanitation facilities.

Recommended for use with copper, aluminum, or bonded sealing gaskets; applying thread sealant or Teflon tape during installation further enhances sealing effectiveness. It is an essential fastener for ensuring long-term operational stability in corrosive, high-pressure, and hygienic-critical applications.