M3X20 JISB 1111 Class 4.8 Metric Phillips Pan Machine Screw Full Thread Zinc (Pack Qty 3,000) BC-MJ320MPP

The “Small Pan” head machine screw per JIS-B1111 is a preferred design for use in small electronic components where there is limited clearance area. The M3 and M4 diameters also meet the requirements of SN 213307 Cheese head screws. Class 4.8 machine screws shall be made from a carbon steel, partially or fully annealed as required, which conforms to the following chemical composition-- Carbon: 0.55% maximum; Phosphorus: 0.05% maximum; Sulfur: 0.06% maximum. Rockwell B 71 - 99.5 (Vickers HV 130 - 250)