Washer
Estimated value as of 2026 · Construction Materials Hawaii retail listings for common washers like split lock and flat washers [9]
A washer in building materials context is a small, flat, thin ring used to distribute load, prevent loosening, or provide insulation under nuts or bolts in construction and assembly.
Fun fact Structural flat washers like F436 start at just $0.14 each, while bulk metal washers trade at around $4,658 per ton globally [7][9].
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