Massive 500 Piece M3 Countersunk Head Socket Cap Screws Set 4 6 8 10 12 14 16 20mm Fully Threaded Ten Nine Grade Black Alloy Steel Metric Machine Screws Bolts Nuts Washers Kit
✔️ 500pcs M3 countersunk screws, 8 lengths 4-20mm, nuts & washers
These M3 countersunk hex socket machine screws come in a 500-piece kit, designed for flush installation in metal parts. They’re ideal for machinery, electronics, automotive, and construction projects where a smooth, low-profile fastener is required. The eight available lengths (4, 6, 8, 10, 12, 14, 16, 20 mm) include 25 pieces per length, with M3 hex nuts and flat washers included, all stored in a sturdy plastic storage box.
✅ 500 pieces total with M3 countersunk hex socket screws
✅ Material: 10.9 grade alloy steel with black oxide finish
✅ Drive: internal hex (Allen) head, right-hand thread
✅ Finish: corrosion-resistant black oxide for rust protection
✅ Includes M3 hex nuts (150 pcs) and flat washers (150 pcs), plus 2 Allen keys
✅ Packaged in sturdy plastic storage box for easy organization
💡 What is a M3 countersunk hex socket screw used for in metal assemblies? This fastener is handy for flush mounting and secure fastening in many projects. - flush mounting on panels, enclosures, and equipment - secure joining with nuts and washers included in the kit - compatibility with standard M3 hex keys for quick assembly - multiple lengths (4-20 mm) allow depth control in tight spaces
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