Modern SF Fastener Logo Design

I’m rebranding my fastener, nut and washer manufacturing company and need a fresh logo built only around the letters “S” and “F”. Think clean, modern lines rather than anything ornate, and please stick to a red-and-yellow palette so it pops on machinery, packaging and our website.

Because the business revolves around strength and precision, I’d like those qualities to come through visually—subtle suggestions of bolts, threads or industrial geometry are welcome as long as the two letters remain the clear focal point. No additional words, icons or taglines should appear.

Deliverables (all in vector format):
• Full-colour logo on transparent background
• One-colour version suitable for engraving
• Source file (AI or SVG) plus high-res PNG

I’ll review initial concepts quickly and provide prompt feedback so we can refine and finalise.