• 522 piece screw kit box containing M3 and M4 black carbon steel hex bolts and accessories.
  • Organized plastic storage case filled with assorted black M3 M4 screws, nuts, and washers.
  • Layout of M3 and M4 round and flat head screws, hex keys, lock nuts, and r-clips included in the set.
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522pcs M3 M4 Hex Socket Screw & Nut Kit - Black Carbon Steel Assortment

522pcs M3 M4 Hex Socket Screw & Nut Kit - Black Carbon Steel Assortment

HK$65.00
HK$65.00
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Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

Upgrade your workshop with this comprehensive 522-piece M3 and M4 Hex Socket Screw Kit. Whether you are repairing RC cars (drones/models), working on 3D printer maintenance, or handling precision electronics, this assortment provides the high-quality fasteners you need in one organized case.

Key Features:

  • Premium Material: Screws are crafted from high-grade Black Carbon Steel for durability and strength. Washers are made from 304 Stainless Steel for corrosion resistance.
  • Versatile Assortment: Includes a wide range of M3 and M4 sizes (8mm to 16mm lengths), covering both Flat Head (Countersunk) and Round Head styles.
  • Complete Accessories: Comes with essential hardware including Nylon Lock Nuts, Flat Washers, O-rings, R-clips, E-clips, and Grub Screws.
  • Ready to Use: Includes 2 matching Hex Keys (Allen Wrenches) so you can start working immediately.
  • Organized Storage: Packaged in a sturdy 15-grid PP plastic box with clear labeling, keeping your parts sorted and easy to find.

Package Contents (522pcs Total):

  • Screws (Black Carbon Steel):
    • M3 Series:
      • Flat Head: M3x8 (30pcs), M3x10 (30pcs), M3x12 (30pcs), M3x16 (30pcs)
      • Round Head: M3x8 (30pcs), M3x10 (30pcs), M3x12 (30pcs), M3x16 (30pcs)
    • M4 Series:
      • Flat Head: M4x8 (20pcs), M4x12 (20pcs)
      • Round Head: M4x8 (20pcs), M4x12 (20pcs)
  • Nuts & Washers:
    • Nylon Insert Lock Nuts: M3 (20pcs), M4 (20pcs) - Stainless Steel
    • 304 Stainless Steel Flat Washers: M3 (20pcs), M4 (20pcs)
  • Specialty Fasteners:
    • Red Silicone O-Rings (5x1mm): 20pcs
    • Galvanized R-Type Cotter Pins (1.5x28mm): 20pcs
    • Dowel Pins (φ2x10mm): 20pcs
    • Black Manganese Steel E-Clips (3.0mm): 20pcs
    • Hex Set Screws (Grub Screws) DIN913: M3x3 (20pcs), M4x4 (20pcs)
  • Tools & Storage:
    • Hex Key φ1.5mm (for M3 set screws): 1pc
    • Hex Key φ2.0mm (for M4 set screws): 1pc
    • 15-Grid Plastic Storage Box (17.8 x 10.5 x 2.3cm): 1pc
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