3/8" OD X 5/8" Spacers | #12 Hole | Aluminum | Plain (250/Pkg.) Hard HNBR O-Rings Thread: 16 threads per inch

Thread: 16 threads per inch

and simplify installation

These washers are engineered to prevent loosening of fasteners in high-vibration environments

Head design: Serrated Indented Hex Washer Head provides even load distribution and anti-rotation to improve clamp performance on sheet metal substrates

secure fastening option

3/8" OD X 5/8" Spacers | #12 Hole | Aluminum | Plain (250/Pkg.) Hard HNBR O-Rings Thread: 16 threads per inchSpecs Dimensions: 3 8 inch outer diameter x 5 8 inch length; Bore: #12 Finish: Plain Material: Aluminum Features Quantity: 250 pieces per package Functional benefits: Maintains precise clearance between mounting surfaces; even load distribution reduces fastener deformation and loosening under vibration Use cases: Panel mounting, equipment housings, automation fixtures, and machinery frames in industrial environments Material properties: Aluminum