Hex Cap Screws
Grade 8 1/2 - 20 x 4"
SAE Yellow Zinc

These Grade eight, Hex Cap Screws, are 1/2 - 20 x 4" SAE in Yellow Zinc. There are 25, each, per box. These cap screws were certified by NASA for a project and remained unused at project completion. The certification nomenclature is "photoed," and may be viewed by following link to your left.

Only: $ 29.95