wing screw 1.Screw Material:nickel plating steel 2.Screw sizes available:M3-M24 3.Lead time:15 days 4.OEM or ODM are welcome black zinc JIS B1184 wing screws A. JIS B1184 wing screws Specification: 1.Screw StandardDIN316, JIS 1184, IFI 156, ASME B18.17 and as per OEM need.2.SizeMetric or inch, #4-#12, 1/4"-5/8(M3-M24) all is ok for us.3. MaterialsAISI C1010, 10B21, SCM435, 45# steel, S25C, S20C, ...