Home / Home Improvement / Parts / Nailer Piston Head Seal 180446 Nailer Piston Head Seal 180446Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: 180446 Brand: STANLEY-BOSTITCH Seller: Sears PartsDirect Categories: Home Improvement, Parts Possible Matches$15.993dRose mug_180446_2 Eat Sleep Surf Fun Surfing Enthusiast Surfer Pa... Description This piston head seal (part number 180446) is for nailers. Piston head seal 180446 helps prevent air from escaping around the piston head. Wear work gloves to protect your hands when installing this part.