Threaded knurled insert Nuts Assortment Kit Set M8 40-Piece for Mechanical Assembly

Specifications:

• Thread Size: M8 (Metric)
• Material: Solid Brass
• Nut Style: Standard 
• Quantity: 40 pieces
• Corrosion Resistance: High
• Packaging: Plastic compartmentalized storage box
• Set Type : Boxed Set
• Application : Mechanical Assembly

Minimum hardware to get started:

• Standard M8 bolts, machine screws, or M8 threaded rods : these are the mating components required to utilize the nuts in any assembly.
• 13mm spanner or socket wrench : to properly tighten the hex nuts without rounding the edges.

Mechanical Assembly Warnings:

• Cross-Threading Risk: Brass is softer than hardened steel. Always start threading the nut by hand for the first few turns before using a wrench to avoid stripping the internal threads.
• Torque Limits: Do not over-torque brass nuts on steel bolts, as the softer brass threads will deform and strip.
• Galvanic Corrosion: While brass is highly corrosion-resistant, mating it with aluminum parts in wet environments can cause galvanic corrosion. Use nylon washers as isolators if necessary.

Accessories
Included in the Box:

• 40× M8 Brass Threaded Hex Nuts
• 1× Compartmentalized Plastic Storage Bo

Frequently Asked Questions

• Are these nuts compatible with standard M8 threaded rods?
  Yes, they feature a standard M8 coarse thread pitch (1.25mm) and will fit perfectly on standard M8 threaded rods and machine bolts.
• Can I use these M8 brass nuts on a 3D printer Z-axis?
  Yes, brass is an excellent choice for 3D printer Z-axis lead screws because its self-lubricating properties reduce friction and wear against steel rods.
• Are these compatible with T-slot aluminum extrusions?
  They can be used to fasten brackets to extrusions if paired with the correct M8 bolts, but they are standard hex nuts, not drop-in T-nuts.
• Can I use these in marine or high-moisture environments?
  Yes, solid brass offers excellent corrosion resistance, making these nuts highly suitable for outdoor or high-moisture applications where steel would rust.
• What is the thread pitch of these M8 nuts?
  These feature the standard metric M8 coarse thread pitch of 1.25mm.
• Will these handle high-torque structural tightening?
  Brass is a relatively soft metal, so while they provide a strong hold, they should not be over-torqued to the same extreme levels as hardened steel nuts to avoid stripping.
• Can these withstand high temperatures?
  Yes, solid brass can easily withstand operating temperatures exceeding 200°C without losing structural integrity, unlike nylon-insert nuts.
• Do I need a specific tool to tighten these?
  You will need a standard 13mm spanner or socket wrench, which is the universal size for M8 hex nuts.
• Should I use a washer with these nuts?
  We highly recommend using a flat washer when tightening these against softer materials like wood or 3D printed plastics to prevent the nut from digging in.
• Do I need to apply lubrication when threading these?
  While brass is naturally lubricious against steel, applying a drop of light machine oil or PTFE grease on moving linear assemblies will significantly extend the nut's lifespan.
• Will these brass nuts wear down over time?
  If used in continuous linear motion (like on a CNC lead screw), the softer brass is designed to act as a sacrificial wear part, wearing down before your more expensive steel lead screw does.
• How do I prevent the nuts from vibrating loose?
  For assemblies subject to heavy vibration, we recommend using a medium-strength threadlocker (like Loctite Blue) or pairing the nut with an M8 lock washer.
• Do these nuts require regular cleaning?
  In static assemblies, no maintenance is required, but in linear motion setups, you should periodically wipe the lead screw and reapply clean grease to prevent brass dust buildup.