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Black carbon steel nuts bolts washers in compartmented plastic box 516 pieces M3 to M6

smseace 516Pcs Nuts and Bolts Assortment Kit 21-Sizes M3-M6

SKU CH-N8QA-CB313

Contains 516 carbon-steel screws, nuts and washers in 21 metric sizes M3–M6, organised in a plastic box for machinery, automotive and DIY repairs

  • Fit and compatibilityM3, M4, M5, M6, 516Pcs M3-M6
  • Main materialSteel
  • Sold as516Pcs M3-M6
  • Number of items516Pcs M3-M6
  • 516-piece kit covers M3 to M6 fasteners for diverse repairs
  • Carbon steel construction resists corrosion and rust for lasting use
  • Precision rolled threads prevent slipping and deformation during tightening
  • Organised plastic box keeps 21 sizes sorted and portable
  • Suits machinery, automotive, furniture and DIY assembly tasks

516-Piece M3–M6 Fastener Kit

This 516-piece assortment supplies metric screws, nuts and flat washers in sizes M3 through M6, all made from carbon steel with a black finish. The components are organised in a plastic storage box for easy transport and selection. It is aimed at technicians, hobbyists and DIYers who need a broad range of common machine-thread hardware in one place.

Who It Suits and Who It Does Not

The kit suits anyone repairing machinery, furniture, automotive or motorcycle parts, plus general electronics and DIY work using M3 to M6 threads. It does not help buyers who need larger diameters such as M8 or M10, imperial threads, specialised drive types, or graded high-tensile fasteners for structural loads.

21 Sizes Across Four Diameters

The assortment covers 21 distinct sizes across the four metric diameters M3, M4, M5 and M6, including 13 screw sizes, four nut sizes and four washer sizes. This breadth decides whether the kit matches the thread sizes required for the job at hand.

How it compares

Measured against everything we stock in Workshop Hardware, Springs & Clamps, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 73% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameSmseace
Part numberCAsm-17-2
Size & build
Main materialSteel
Compatibility
Fit and compatibilityM3, M4, M5, M6, 516Pcs M3-M6
In the box
Number of items516Pcs M3-M6

Questions about this item

What storage box dimensions are needed for the 516-piece M3-M6 assortment?

The kit includes a plastic storage box that holds all 516 pieces of M3, M4, M5 and M6 screws, bolts, nuts and flat washers in labelled compartments.

Which step is often missed when installing these carbon-steel fasteners?

Users frequently skip cleaning the mating threads before assembly, which lets grit damage the rolled threads and reduces clamping force.

What replacement items will be needed after the original 516 pieces are used?

Individual M3, M4, M5 or M6 bolts, nuts or flat washers in carbon steel can be restocked to refill the same compartmented box.

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