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How do we determine the material of a screw or a bolt? - Rainbow Hardware - Fasteners Specialist Made in Taiwan Since 1980.
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Considerations for selecting the proper fastener materials for your application - UC Components, Inc.
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Wood screw M3*4/5/6.5 Flat Thin Head Machine Screw Wafer Head Screws Steel Black Zinc Plated (Color : 1000pcs, Size : M3x6.5 D8x0.8) : Amazon.co.uk: DIY & Tools
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Qualfast M8 Hex Socket Countersunk Screw, Steel, Material Grade 10.9, 20mm, DIN 7991 6042074G | Cromwell Tools
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