Personalized Nuts and Bolts Pumpkin Youth T-Shirt. A pumpkin face made up of nuts and bolts is a humorous gift design for mechanics and structural engineers at Halloween and birthdays. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.