Fasteners kit engineered for secure joining of European 20 series aluminium profiles, GLARKS M5 T Slot Drop-in Bolt Set. Having a choice of four bolt lengths and matching hexagon flange nuts keeps builds tidy and reduces fiddly trips for parts. Is the kit the sensible choice for small workshops and DIY builders?
⚡ At a Glance
- • Durability: Nickel-plated carbon steel resists corrosion and wear
- • Best for: Assemblers and hobbyists working with European 20 series aluminium profiles
- • Not ideal for: Applications that require stainless steel or specialised corrosion resistance
Includes forty M5 drop-in T bolts in four lengths plus forty M5 hexagon flange nuts. Hammer-head measures 10.2 x 6 x 3.3 mm and is designed to seat in 20 series T-slots.
Secure joints – with M5 T slot drop-in bolts
T-head (hammer head) slides into the T-slot and aligns with the slot profile, while the M5 threaded shank accepts hexagon flange nuts to clamp parts together. Clear, well-polished threads ensure reliable engagement when tightening.
Stable clamping reduces movement in frames and fixtures, making assemblies stiffer and more reliable during use.
Versatile fit – thanks to four bolt lengths (10/12/16/20 mm)
Four supplied lengths cover common profile wall thicknesses and accessory clearance requirements, with ten bolts supplied per length to match typical small projects. Bolt lengths allow matching to connectors, brackets and panel thicknesses without additional sourcing.
Keeps a range of builds moving without pausing to order specific lengths, saving time during assembly and prototyping.
Improved longevity – with nickel-plated carbon steel finish
Carbon steel core gives high hardness while a nickel-plated surface provides an oxidation-resistant barrier and wear resistance; threads are polished to reduce friction during installation.
Fewer corroded parts and less wear over time, which reduces maintenance and replacement in standard workshop environments.
✨ The 4 Key Reasons for GLARKS M5 T Slot Drop-in Bolt Set
- 80-piece kit – Sufficient bolts and nuts for multiple small projects
- Four bolt lengths – Handles common profile thicknesses and accessory clearance needs
- Pre-measured hammer head – Designed for standard 20 series T-slots with precise hammer-head sizing
- Polished threads – Polished threads help reduce cross-threading and speed assembly
📋 Technical Details at a Glance
- Category: T slot drop-in bolts and nuts kit
- Thread: M5
- Hammer head size: 10.2 x 6 x 3.3 mm (L × W × T)
- Bolt lengths: 10 mm, 12 mm, 16 mm, 20 mm (10 pieces each)
- Nut type: M5 hexagon flange nuts (40 pieces)
❓ Frequently Asked Questions
Q: Are these compatible with 20 series aluminium profiles?
A: Yes, the hammer-head dimensions and overall design are specified for European standard 20 series T-slots.
Q: What sizes and quantities are included in the kit?
A: The kit contains 40 M5 T slot drop-in bolts in four lengths (10 mm, 12 mm, 16 mm, 20 mm) with 10 bolts of each length, plus 40 M5 hexagon flange nuts, totalling 80 pieces.
Q: What material and finish do the bolts have?
A: Bolts are carbon steel with a nickel-plated surface treatment for improved hardness, wear resistance and corrosion protection; threads are polished for smooth engagement.
🏆 Our Verdict
Small workshops, makers and assembly technicians who work with 20 series aluminium profiles will benefit from the included sizes and matching nuts. The combination of multiple bolt lengths, matching hexagon flange nuts and a nickel-plated finish simplifies assembly and improves longevity. While cost depends on the retailer, the comprehensive 80-piece set delivers sensible long-term value for frequent builders.
