The 4550 Series mini nut and bolt hose clips are W1 zinc plated steel clamps designed for small bore fuel lines, vacuum hoses, breather pipes and carburettor connections. The slim profile fits where standard worm-drive clamps will not — particularly under bonnets and around manifolds where space is tight.

Tightened with a standard 7mm spanner or socket, mini nut and bolt clips can be released and refitted as often as required, making them the practical choice over crimped 2 ear clamps when fuel system diagnosis or rebuild work is likely. The W1 finish suits dry, non-corrosive applications.

Available sizes (boxes of 10)

• F9-W1 — 7-9mm
• F11-W1 — 9-11mm
• F12-W1 — 10-12mm
• F13-W1 — 11-13mm
• F14-W1 — 12-14mm
• F15-W1 — 13-15mm
• F16-W1 — 14-16mm
• F20-W1 — 18-20mm

For an assortment with all sizes in one case, see the 4550 Series F50-W1 workshop kit.