Best Screw & Bolt Assortment Sets for Diy Projects (2026)

We ranked sets by material grade and coating, size range and included hardware (nuts/washers), piece-count usefulness for DIY, and verified customer ratings to measure real-world fit and value

This roundup covers metric and mixed screw & bolt assortment sets suited for DIY projects, comparing fit, material grade, and included hardware for general home, auto, and hobby use. Picks were chosen by evaluating bolt grades (8.8), material/coating (yellow zinc, carbon/alloy steel), piece counts, and customer ratings to balance fit and value

Top Picks

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    Kadrick metric flange bolt set 700Pcs M6-M10

    Kadrick metric flange bolt set 700Pcs M6-M10

    Kadrick • ★ 4.0/5 • Budget

    Comprehensive set of flange bolts, nuts, and washers totaling 700 pieces in metric sizes. Includes 175 bolts, 175 nuts, and 175 washers per size group, with black zinc plating for durability. Customers note good quality and handy case, with some mixed feedback on quantity

    • comprehensive 700-piece set
    • metric M6-M10 range
    • case for organization
    Check current price on Amazon →
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Buying Guide

Match bolt grade to application

Choose 8.8-grade bolts (common in listed kits) for structural or mechanical DIY tasks; lower grades or unspecified ratings are better for light fixtures and trims

Prefer coated or alloy steel for corrosion resistance

Yellow zinc or alloy/carbon steel finishes on several kits improve rust resistance for outdoor or garage projects compared with plain steel

Check included sizes and standards

Confirm kits list the specific metric sizes you need (M5–M12, M6/M8/M10, etc.) so you don’t buy a set missing critical diameters for your projects

Evaluate piece count vs. diversity

Higher-piece assortments give quantity and variety (useful for mixed repairs), while smaller focused kits concentrate on common sizes like M5–M8 for targeted work

Look for nuts, washers, and flange options

Sets that include nuts, washers, and flange bolts reduce the need to source matching hardware separately and help ensure proper fit and clamping