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A divided plastic case holding 950 black M3 socket head screws nuts and washers

Kernmax M3 Screws Assortment Kit 950pcs 12.9 Alloy Steel M3x6-30mm Hex Socket Head Cap Bolts Nuts Washers Set

SKU CH-NWGN-V5SH8

950-piece M3 hex socket cap bolt kit with nuts and washers in eight lengths from 6 mm to 30 mm, made from 12.9 grade alloy steel with black zinc plating and supplied in a labelled storage case

  • Main materialSteel
  • Sold asKit
  • Number of items950
  • Key featuresM3 Screws Assortment Kit (950 Piece)
  • 950-piece kit covers eight metric lengths from 6 to 30 mm
  • 9 grade alloy steel delivers high tensile strength for demanding assemblies
  • Black zinc plating resists rust and corrosion in indoor or outdoor use
  • Precision tolerance under 0.01 mm ensures accurate fit across all components
  • Divided storage case with labelled compartments keeps bolts, nuts and washers organised

Kernmax M3 950-piece fastener kit

This 950-piece M3 assortment supplies hex socket head cap bolts, nuts and washers in eight lengths from 6 mm to 30 mm. It targets hobbyists and professionals working on 3D printers, electronics, RC models, CNC machinery, furniture, bicycles and automotive repairs. The kit replaces multiple small purchases with one organised box. Builders needing larger diameters or different head styles will not find them here.

Indoor and outdoor corrosion resistance

Black zinc plating on the 12.9 grade alloy steel provides rust protection without an oily residue, keeping hands and workpieces clean during assembly. The supplier notes the finish suits long-lasting indoor and outdoor use. No thermal, noise or power-draw data applies to fasteners.

Precision tolerance and compartmented storage

Each bolt is manufactured to a tolerance under 0.01 mm for accurate fit in high-stress joints. The divided plastic case labels every compartment so the 950 pieces stay sorted by length and type, reducing search time on the bench. The kit contains only M3 hardware; M4, M5 or M6 requirements are not covered.

How it compares

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

Price $13.99
Cheaper than about 70% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameKernmax
Model nameM3 Screws Assortment Kit (950 Piece)
Part numberKN260327-007
Size & build
Main materialSteel
In the box
Number of items950

Questions about this item

How do I install the M3x6 through M3x30 socket-head cap screws without stripping the drive?

Select the hex key that fits the 3 mm internal drive, insert it fully, apply steady axial pressure while turning, and stop when the head seats flush against the surface.

What maintenance or replacement will the 12.9 grade alloy steel fasteners with black zinc plating need over time?

Inspect periodically for plating damage or corrosion; replace any screw, nut, or washer that shows rust, thread deformation, or stretched shank after high-load cycles.

Which limit appears first when the M3 bolts are used continuously in a high-vibration 3D printer frame?

The 12.9 tensile strength resists shear well, but the M3 thread engagement length — shortest at 6 mm — reaches its preload limit before the shank yields.

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