Asta Knob
A knurled drum knob on a knurled concealed rose. Diamond knurling runs the full circumference of both, so knob and rose read as one turned object, and the slim neck sets the grip clear of the door so the hand meets metal, not timber. Solid brass, half-sprung, supplied as a pair.
- Knob Ø 57.15 × 18.5 mm · knurled
- Rose Ø 63 × 10.5 mm · knurled, concealed fixing
- Projection 65.5 mm from door face
- Neck Ø 22 mm, widening to Ø 24 mm at the rose
- Solid brass
- Half-sprung — suits a lightly sprung tubular latch
- 8 mm spindle — suits all Cast latches and locks
- Requires a tubular latch or bathroom lock, ordered separately
- Supplied as a pair with spindle and fixing screws
- Termless guarantee
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Half-sprung: the rose carries a partial return spring, so on a heavier door pair the knob with a lightly sprung tubular latch to bring it back cleanly. The rose fixes concealed — no visible screws on the face. A tubular latch or bathroom lock is required and ordered separately; the Cast Latch and the Cast Bathroom Lock both run on the same 8 mm spindle. Knob and rose diameters are taken from the supplier general arrangement. Fire rating is not yet certified for this knob — specify the Asta Lever where FD30 or FD60 is required.
