1/4"-20 x 1-1/2 in Phillips Flat Machine Screw, Plain Titanium It is also the most affordable and used in cooling systems, boat and ship These flat head screws are TRUE TITANIUM(TM), specifically commercially pure Grade 2 (CP) titanium.
Tighter tolerances in the aftermarket vs. BLADE-MOWER, XHT, 21-3/16", 6 PT Star, C to C: 2-1/2", Center Hole: 6 pt. star, Outer Hole: 5/16", Type: High Lift - Notched, Width: 3", Web Notes: Replacement XHT Lawnmower blade.