6 pack of M4-3
10mm x 1.25 Course thread, male steel nut with non-threaded lead, 19mm long
This nut works with both SAE (45 degree/inverted/double) and DIN (bubble/ISO) flares
Sometimes found on ABS units and vintage Fiats.
Save 50% off individual nut prices.
Use with 3/16"/4.75mm (CNF-3) tubing