MCMASKE 1200PCS Stainless Steel Hex Socket Head Cap Screws Nuts Flat Washers Assortment Kit 1"(Length is measured from under the head) They generally have a smaller

They generally have a smaller ID and OD than USS washers

Matching M3 Hex Nuts 80 PCS and M3 Flat Washers(DIN125) 80 PCS

MCMASKE 300 Piece Hardware Metric Stainless Steel Hex Nuts Assortment Kit For Sale $14

Material Stainless Steel 304 Fastener Type Nylon-Insert Locknuts Thread Size #4 to 3/8"-16 Exterior Finish Stainless Steel Color Silver

A nylon insert grips threads to resist loosening

MCMASKE 1200PCS Stainless Steel Hex Socket Head Cap Screws Nuts Flat Washers Assortment Kit 1"(Length is measured from under the head) They generally have a smallerMCMASKE 1200 Piece M1. 6 M2 M2. 5 M3 Stainless Steel Hex Socket Head Cap Screws Nuts Flat Washers Assortment Kit $24. 99