• Model NO.：5.5*25
• 4.2*25：8#*25
• Head：Flat Head Hex Driver with Pin
• Type：Self Tapping Screw
• Head Style：Hexagonal with Pin
• Connection：Tapping
• Grade：8.8
• Zinc：96 Hours Withou Corrosion
• Stock：Yes
• Transport Package：Bulk in Carton,PP Bag Then in Carton,Small Box.
• Specification：JIS DIN GB ANSI Bsw ISO
• Origin：China
• HS Code：73181500
• Production Capacity：20tons,Day

Popular screw always in stock as below:
Self drilling screwsStandard: IFI,DIN,JIS,GB,Special DesignSize Range: M1.4-M8(0#-14# &M8)Length Range: 6mm-300mmMaterial: Carbon steel and stainless steel A2 A4 & SS410 & Bi-metal                    FLATPANHWHHWFBUGLEWAFERPAN WASHEROVALTRUSSROUNDDRIVE         PHILLIPSSQUAREPOZISQUARE+PHILTORXSLOTTEDPHIL+SLOTTEDOTHER  POINT TYPE    TEK#1TEK#2TEK#3TEK#4TEK#5TYPE 17    THREAD TYPE   TYPE-ABSD TYPECSB TYPEHI-LOWMACHINEDOUBLEOTHER   10#-12 THD6#-20 THD8#-32 THD       12#-11 THD7#-19 THD10#-24 THD   14#-10 THD8#-18 THD12#-24 THD    10#-16 THD14#-20 THD   PLATING  PLAINZINC PLATEDCOLOR ZINC PLATEDBLUE ZINC PLATEDBLACK PHOSPHATEGRAY PHOSPHATEBLACK ZINC PLATEDWHITE ZINC PLATED  BLACK OXIDEDECROTIZEORUSPERTXYLANNICKELBRONZESPRAY PAINTOTHER    SERRATION UNDER HEADW / O WASHERW / BONDED WASHERW / PVC WASHERW / STEEL EPDMW/RUBBER WASHERW / HEAD MARKW / WINGOTHER 
Pin Hex and Pin Torx Screws
Arguably there is little to choose between these two security pin screws. Both have a far higher torque rating than philips screws, meaning they can be tightened to almost any level you require without the driver insert, wrench or screwdriver breaking. That said, the pin torx screw, with its 6 lobe configuration, performs better in torque rating under strict test conditions. It is for this reason that the Pin Torx screw is often favoured by industry professionals.