Why source fasteners locally for projects and production
When a prototype or maintenance job stalls because of a missing screw, nut or mounting kit, weeks of waiting destroys momentum. Communica keeps a broad, locally accessible selection of fasteners and hardware so South African makers, students, technicians and procurement teams can finish jobs on schedule. Local availability reduces lead times, simplifies VAT invoicing for schools and businesses, and enables branch collection from Samrand, Pretoria or Cape Town.
Practical value beyond part numbers
Choosing the right fastener isn’t just about diameter and length - it’s about material, thread form, surface finish and application constraints (electrical contact, vibration, thermal cycling). Below you’ll find focused guidance to match common SA use cases: student lab rigs, embedded electronics enclosures, motor mounts for robotics, and light industrial repairs.
Quick access to stock and local support
Check live availability and pickup options across branches - or request a consolidated quote for larger buys. For branch locations and trading hours see our branches page: Branches & Trading Hours. Prefer to browse by category? See our hardware and supplies in the collections: Shop by Category.
Selection criteria: match material, thread and treatment to the job
Material choices and when to use them
- Steel (zinc-plated) - cost-effective for chassis and non-corrosive indoor use.
- Stainless steel (304/316) - for mildly corrosive environments or where staining must be avoided.
- Brass - for electrical terminations or where galling should be avoided on small threads.
- Nylon/Delrin fasteners - electrically insulating, lightweight, useful in prototypes and student projects.
Thread types, fit and strength
Coarse vs fine threads influence grip and adjustment. Metric ISO threads (M) are most common in hardware sourced for electronics and enclosures. For thin-sheet mounting pair with appropriate washers or rivet nuts. For high-vibration assemblies consider prevailing torque locknuts or nyloc variants.
Specification snapshot
| Type | Use case | Typical sizes stocked |
|---|---|---|
| Pan head machine screws | PCB standoffs, enclosures | M2, M2.5, M3, M4 |
| Hex bolts | Structural mounts, motor brackets | M5-M12 |
| Self-tapping screws | Plastics and sheet metal | 3.5mm, 4.2mm |
| Nuts & washers | Vibration protection and load distribution | Various |
Accessory bundles and compatibility guidance
When ordering hardware for PCBs or enclosures, bundle screws, standoffs, washers and corresponding nuts to ensure compatibility. For electronics racks and 19" mounting use M6 kits; for Arduino/RPi shields M2/M2.5 standoffs are typical. Explore brand and component ranges at our brand index: Shop by Brand.
