M4 Stainless Steel Folding Knife Handle Lock Screws – 10 Sets

10 Sets M4 Stainless Steel Folding Knife Handle Lock Screws – DIY Knife Making Accessories

Build, repair, or customize your folding knives with precision and confidence. These M4 thread stainless steel lock screws are designed specifically for DIY knife makers and hobbyists who demand reliable, rust-resistant hardware. Each set includes everything you need to securely assemble a folding knife handle — making them ideal for both first-time builders and seasoned craftspeople.

What's in the Box?

You receive 10 complete sets of hardware. Each set contains:

• 2 × Unilateral screws (M4 thread)
• 1 × Connecting rod (spindle axis)

Available in both 5mm and 6mm hole sizes, with a wide range of total lengths (13mm to 44mm), so you can match the exact thickness of your knife handle scales.

Key Features

• Material: Premium stainless steel — corrosion-resistant, strong, and durable
• Thread: M4 standard thread for secure, tight fitting
• Versatile sizing: Fits 5mm and 6mm handle holes across 10 different length variants per hole size
• Head diameter (HD): 2mm for a low-profile, clean finish
• Neck diameter (ND): 10mm for a solid pivot point
• High-concerned chemicals: None
• No hazardous substances — safe for everyday DIY use

Size Reference Table

For 5mm Hole Sizes (D=5mm, ND=10mm, HD=2mm):

• Size 1: Total 18mm | L=14mm
• Size 2: Total 20mm | L=16mm
• Size 3: Total 21mm | L=17mm
• Size 4: Total 24mm | L=20mm
• Size 5: Total 13mm | L=9mm
• Size 6: Total 16mm | L=12mm
• Size 7: Total 29mm | L=25mm
• Size 8: Total 34mm | L=30mm
• Size 9: Total 29mm | L=35mm
• Size 10: Total 44mm | L=40mm

For 6mm Hole Sizes (D=6mm, ND=10mm, HD=2mm):

• Size 1: Total 18mm | L=14mm
• Size 2: Total 20mm | L=16mm
• Size 3: Total 21mm | L=17mm
• Size 4: Total 24mm | L=20mm
• Size 5: Total 13mm | L=9mm
• Size 6: Total 16mm | L=12mm
• Size 7: Total 29mm | L=25mm
• Size 8: Total 34mm | L=30mm
• Size 9: Total 29mm | L=35mm
• Size 10: Total 44mm | L=40mm

Perfect For

• DIY folding knife assembly and repair
• Custom knife handle fabrication
• Replacing worn or damaged pivot hardware
• Home workshop and hobby projects

Made in Mainland China.

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Frequently Asked Questions

Q: How many screws are included in total with the 10-set pack?

A: Each of the 10 sets contains 2 unilateral screws and 1 connecting rod, giving you a total of 20 unilateral screws and 10 connecting rods — everything required to assemble 10 folding knife pivot points.

Q: What hole sizes do these M4 knife handle screws fit?

A: These screws are available to fit either 5mm or 6mm handle hole sizes. Each hole size comes in 10 length variants ranging from 13mm to 44mm total length, so you can select the perfect fit for your specific knife handle thickness.

Q: Are these screws rust-resistant for long-term use?

A: Yes. All hardware in this set is made from stainless steel, which provides excellent resistance to rust and corrosion — making them durable for long-term use in DIY knife making and workshop projects.

Q: Are these compatible with standard folding knife DIY kits?

A: Yes. The M4 thread standard and the range of sizes (5mm and 6mm hole diameters, 13–44mm lengths) make these screws compatible with the vast majority of DIY folding knife handle kits and custom scales available on the market.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.