300-series stainless steel fasteners can develop slight magnetism after cold forming due to austenite-to-martensite phase transformation. Learn the science behind it and how to select the right grade for your...
Read MoreHot-dip galvanizing applies a thick, dense pure zinc coating to fasteners, delivering superior corrosion resistance for outdoor steel structures. This guide covers the process, key standards, OEM specifications, and why...
Read MoreZintek is a zinc flake coating system for fasteners that offers adjustable friction coefficients, no hydrogen embrittlement, and excellent corrosion resistance — approved by Bosch, Daimler, Volkswagen, and PSA.
Read MoreA technical overview of Magni series zinc-aluminum flake coatings for fasteners, covering how the system works, OEM specifications (GMW3359, PS11036, WSS-M21 P37-A3, GS90010), key performance advantages, and a comparison with...
Read MoreGeomet is a chromium-free zinc-aluminum flake coating widely used on fasteners in automotive, heavy truck, and renewable energy industries. This guide covers how it works, its key benefits, available grades,...
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FULLERKREG explains the cryogenic Charpy impact test (ASTM E23-2024, KV8, −196°C) performed on raw material test bars for A193 B8M CL2 stud bolts — what the results mean, why −196°C...
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FULLERKREG explains the low-temperature Charpy impact test (ISO 898-1:2013, KV2, -20°C) for DIN933 A4-80 SUS316 stainless steel bolts — what the results mean, why the test matters, and how to...
Read MoreA comprehensive technical reference covering hex nut across-flats (S), hex bolt head across-flats (S), socket head cap screw drive sizes, and metric/imperial thread pitch tables across GB, ISO, DIN, ASTM...
Read MoreA side-by-side technical comparison of 9Cr18Mo, 9Cr18MoV martensitic stainless steels, and 1.7729 (20CrMoVTiB4-10) high-temperature bolting steel — covering GB/T 1220 and EN 10269 chemical composition, mechanical properties, and application selection...
Read MoreA lighthearted look at how a FULLERKREG fastener grows up — from raw material inspection through forming, heat treatment, surface finishing, and final quality checks before shipping. A fun introduction...
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