Step key with adapter | 9.6 / 11.6 / 12.7 / 16.4 / 21 mm (YT-03319)

Brand
Yato
Series
GRD
Symbol
YT-03319

Graduated key with a 1/2" drive designed for installation work on heating fittings and threaded connections. Made of chrome-vanadium steel (CrV), it ensures high resistance to torsional loads and wear during frequent use. The graduated construction allows for handling multiple diameters with one tool, and the notches on both sides enable secure fitting in screws with protrusions.

Application:

assembly and disassembly of external threaded fittings
installation of radiator valves
handling of bottom cut-offs on radiator returns
screwing in valve extensions
Size range:

3/8" (9.6 mm)
29/68" (11.6 mm)
1/2" (12.7 mm)
21/32" (16.4 mm)
27/32" (21 mm)
Design features:

drive: 1/2" (12.7 mm) – compatible with ratchet or handle
material: CrV steel – increased durability and resistance to deformation
working notches on both sides – stable guidance in elements with protrusions
graduated construction – one tool replaces multiple installation keys