Description

rolling shutter spring Material grade: CK*0, CK*7, CK*0, CK*5, C*5CR1, Thickness: 0.*5mm to 2.5mm, tolerance max +/*0.*1 mm Width: 8.0mm to **0mm tolerance max +/*0.*5mm Finish: nature, bright, grey, polished, yellow, blue, bronze, black Hardness: ****8HRC for cold rolled process, ****5HRC for hardened&tempered process, below *0HRC for anneal process, according to user`s requirements Edge: slit, round, square Packing: each bundle with anti-rust paper and light oil then wrapped in plastic film with metallic pallet and put in *0ft contatiner for standard sea worthy Standard: GB, JIS, DIN Aplication: roller shutter spring, bandsaws, spring clips, construction tools, filler knife, agriculture tools steel shank, steel toe capetc. Flat surface and uniform hardness