AN Cap Block Off Fitting AN4 AN6 AN8 AN10 AN12, Female Flare, Black

Cap off an unused male AN port, or blank a line while you are mid-build. Keeps the dirt out and lets you pressure test the system.

• Sizes: AN4, AN6, AN8, AN10, AN12
• Female AN flare
• Black anodised aluminium
• Sold individually

AN size chart

Frequently asked questions

How do I tell what size my AN fitting is?
Measure the outside of the male thread and match it to the size chart above. For example, 9/16" (about 14.3 mm) across the thread is AN6, and 3/4" (19 mm) is AN8.

Do AN fittings need thread tape or sealant?
No. The seal is made on the 37 degree flare, not the thread, so keep tape and sealant off the AN side. Only the NPT (tapered pipe) end of an adapter needs sealant.

How tight should AN fittings be?
Snug them up by hand, then about a quarter turn with a proper AN spanner. Aluminium fittings do not need much. Over-tightening can crack the flare.

Quality and warranty

• Made in China, precision CNC-machined from solid aluminium, not cheap cast or pot-metal fittings
• Tough anodised finish, clean threads and true 37 degree flares that seal properly
• 2-year repair or replacement warranty against defects in materials and workmanship, on top of your rights under Australian Consumer Law
• Sold and backed by Tucks Performance, an Australian-owned business. Not sure what you need? Send us a message

Delivery: ships direct from our supplier partner, usually 10 to 20 days.