M3.5*18*M2.5 Slotted Pan Head Shoulder Screw 304 Stainless Steel Shoulder Diameter 3.5mm Shoulder Length 18mm Thread M2.5-0.45mm(800pcs/pack) Weight-Pound:19.9 These general-use flat washers are

These general-use flat washers are placed under the head of a bolt or nut to create a smooth bearing surface and distribute the load over a wider area

Flange nuts feature a washer-like base that distributes pressure over a larger area

or cap nuts

Fender washers have a larger outer diameter to improve load distribution on thin surfaces

Countersunk serrated lock washers feature a unique design that provides a secure grip and prevents loosening under vibration

M3.5*18*M2.5 Slotted Pan Head Shoulder Screw 304 Stainless Steel Shoulder Diameter 3.5mm Shoulder Length 18mm Thread M2.5-0.45mm(800pcs/pack) Weight-Pound:19.9 These general-use flat washers are