Fastening hardware for secure sheet-metal joins, promising vibration-resistant threads for workshops and site work, Mardatt Self Clinching Nuts. Confidence during repairs and builds comes from corrosion-resistant fixings organised in a practical kit. Are the assorted sizes and galvanised construction suited to both hobbyists and professional applications?
⚡ At a Glance
- • Holding Strength: Knurled, self-clinching design locks into sheet metal to create firm thread engagement
- • Best for: Workshops, manufacturers and DIYers needing permanent threaded anchors in metal and wood assemblies
- • Not ideal for: Applications outside metal or wood substrates where clinching cannot form a reliable joint
Galvanised carbon steel construction combines corrosion resistance with locking, self-clinching threads. The kit contains 220 pieces across M3, M4 and M5 sizes, stored in a plastic box.
Secure, vibration-resistant joins - with knurled self-clinching retention
Knurled round-head inserts press into prepared sheet-metal holes so internal inserts form a close fit with bolt threads, generating frictional anti-loosening resistance. Deep, even threads and a burr-free finish ensure consistent torque transfer.
Strong mechanical locking keeps fastenings stable under vibration and impact, ideal for chassis, refrigeration frames and machinery. Access panels and assemblies stay reliably fixed over time.
Long-term corrosion protection - thanks to galvanised carbon steel
Galvanised carbon steel plating gives anti-rust and anti-corrosion properties that slow surface oxidation in damp or exposed environments. The material choice suits repeated use where environmental resistance matters.
Fastenings remain serviceable outdoors and in humid locations without rapid deterioration. Maintenance intervals lengthen compared with untreated inserts.
Ready-to-use assortment for on-site work - with organised 220-piece kit
The set contains twelve size variations across M3, M4 and M5, packaged in a plastic box for easy selection and transport. Each sub-pack contains 20 pieces, enabling quick swaps and bulk use.
A widely ranged stock avoids repeated trips for parts and suits both one-off repairs and small production runs. Quick access saves time when fitting units or carrying out maintenance.
✨ The 4 Key Reasons for Mardatt Self Clinching Nuts
- Galvanised Carbon Steel - Resists rust, extending usable life in damp environments
- Assorted M3–M5 Sizes - Covers common thread requirements across small to medium assemblies
- Knurled Round Head - Improved grip during press-in installation reduces rotation under load
- Plastic Storage Box - Keeps 220 pieces organised for quick access and effortless transport
📋 Technical Details at a Glance
- Material: Galvanised carbon steel
- Quantity: 220 pieces total
- Sizes included: M3 x 2.3mm, M3 x 2.5mm, M3 x 2.88mm; M4 x 2.8mm, M4 x 3.1mm, M4 x 3.3mm, M4 x 4.2mm; M5 x 2.8mm, M5 x 3mm, M5 x 3.4mm, M5 x 4.2mm
- Pieces per size: 20 of each listed size
- Finish: Galvanised (anti-rust)
❓ Frequently Asked Questions
Q: What exactly is included in the kit?
A: The kit contains 220 self-clinching nuts, with 20 pieces of each listed M3, M4 and M5 size, supplied in a plastic storage box.
Q: Are the fasteners suitable for outdoor use?
A: Galvanised carbon steel gives anti-rust and anti-corrosion properties, making the fastenings suitable for many indoor and outdoor applications.
Q: How do the nuts stay secure once fitted?
A: Internal inserts form a close fit with bolt threads to generate friction resistance and reduce loosening, while knurled heads lock into sheet metal for stability.
🏆 Our Verdict
Suitable for workshop users, manufacturers and maintenance teams who need reliable, corrosion-resistant threaded anchors for metal and wood assemblies. The wide assortment of M3, M4 and M5 sizes, plus galvanised carbon steel construction, makes the kit especially useful for repetitive repairs and production tasks. Durable materials and organised storage deliver solid long-term value for ongoing maintenance and assembly work.
