50Pcs M3 x 0 5mm Nylock Nylon Insert Hex Lock Nuts & 100Pcs 11mm Long M3X10mm Hex Socket Button Head ScrewsHex head, female threaded inside, stainless steel material, anti-loose hex nut Used with a machine or cap screw for mechanically joining materials together Used widely for matching screws or bolts Fixing component, industrial and construction fasteners Used widely in the home and office appliance, communication equipments, ship assembly and other machinery industry Material: 304 Stainless Steel;Color: Silver ToneNylon Lock Nuts:Product Name: Nylon Lock NutThread Size: M3 x 0 5mm(Dia * Pitch)Height: 4mm/ 0 16inchHex Size: 5 5mm/ 0 21inchButton Head Screws:Product Name: Button Head Screws;Head Type: Button Head;Screw Type: M3x 10mm;Thread Diameter (d): 3mm/ 1/8inchThread Length (L): 10mm/3/8inch;Thread Pitch: 0 5mm;Hex Key Width (S): 2mm/ 0 08inchHead Size (dk xk): 5 5 x 1 7mm/ 0 22inch x 0 07inch(D * H);Overall Size: 11 x 5 5mm/ 0 43inch x 0 22inch(L * D)package contents:50(+/-2%) x Nylon Lock Nuts100 (+/-2%) x Button Head ScrewsOnly the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm