we can manufacture all kinds of truss phillips self drilling screws(round head screws)of course any other self drilling screws. Material: carbon steel shank diameter: range from 1/2"(13mm)to 2-1/4"(57mm) head diameter: #8(4.2mm),#10(4.8mm) feature: truss phillips head self drilling washer standard: DIN/ANSI/BS/JIS finish: Zinc plated/black finished/yellow zinc plated size: #8-18*13 to #10-16*41 DESCRIPTION PARTNO. SIZE DIA LENGTH(mm) POINT.NO MATERIAL THICKENESS TRUSS PHILLIPS TR08013BK #8-18*13 1/2"(13) TR08016BK #8-18*16 5/8"(16) TR08019BK #8-18*19 4.2 3/4"(19) #2 0.9~2.5 TR08025BK #8-18*25 1"(25) TR08032BK #8-18*32 1-1/4"(32) TR08041BK #8-18*41 1-5/8"(41) TRUSS PHILLIPS TR10013BK #10-16*13 1/2"(13) TR10016BK #10-16*16 5/8"(16) TR10019BK #10-16*19 4.8 3/4"(19) #3 0.9~2.5 TR10025BK #10-16*25 1"(25) TR10032BK #10-16*32 1-1/4"(32) TR10041BK #10-16*41 1-5/8"(41)