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![DU-BRO 4-40 x 1.25" Mounting Bolts & Blind Nuts - 127 - MPM Hobbies](http://mpmhobbies.com/cdn/shop/files/du-bro-4-40-x-1-25-mounting-bolts-and-blind-nuts-127-mpm-hobbies_436x436.jpg?v=1709533102)
For mounting engines, it includes 4 each of bolts, flat washers, lock washers, and blind nuts. 4 sets/pkg with 8 grams/pkg of weight.