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1.5 inch flat washer
QS Fastener: 1.5 inch flat washer
Name: 1.5 inch flat washer
Standard: ANSI B18.22.1
Material: 304
Size: 1-1/2 inch
Tickness: 4 mm
Surface: Natural color
Standard: ANSI B18.22.1
Material: 304
Size: 1-1/2 inch
Tickness: 4 mm
Surface: Natural color
Quantity
1.5 inch flat washer is manufactured from 304 stainless steel, meets ANSI B18.22.1 SAE narrow-type standards, is 4 mm thick, and features a natural finish. It combines corrosion resistance with high strength, is purpose-built for confined spaces, reduces contact impressions, and extends joint life. Widely used in chemical equipment, outdoor structures, and precision machinery. Large stock available, fast delivery supported.
Corrosion of stainless-steel fasteners
Stainless steel resists rust because chromium forms a passive chromium-oxide film that blocks oxygen from reaching the metal beneath. Thus, stainless steel does not “never rust,” but merely “rusts less readily.” When this film on a 1.5 inch flat washer is damaged, corrosion begins.
Stainless steel resists rust because chromium forms a passive chromium-oxide film that blocks oxygen from reaching the metal beneath. Thus, stainless steel does not “never rust,” but merely “rusts less readily.” When this film on a 1.5 inch flat washer is damaged, corrosion begins.
1. Dust or dissimilar-metal particles settling on a 1.5 inch flat washer can, in moist air, create a micro-galvanic cell with condensed water, triggering electrochemical corrosion that destroys the film.
2. Organic residues (e.g., vegetable juice, noodle broth) on a 1.5 inch flat washer form organic acids in the presence of water and oxygen, attacking the protective film.
3. Acidic, alkaline, or saline substances (e.g., lime wash from construction) contacting a 1-1/2 inch flat washer cause localized pitting.
4. In polluted atmospheres rich in sulfides, carbon oxides, or nitrogen oxides, condensate can become sulfuric, nitric, or acetic acid droplets, leading to chemical corrosion of the 1.5 inch flat washer.
5. Coastal environments carry airborne salt that corrodes 1.5 inch flat washer and other stainless fasteners.
Maintenance recommendations
To maximize the service life of 1.5 inch flat washer, wipe surfaces regularly with clean water or a neutral detergent to remove deposits; avoid direct contact with dissimilar metals during installation; in high-salt or aggressive environments, switch to 316-grade 1.5 inch flat washer and apply an anti-corrosion coating.
To maximize the service life of 1.5 inch flat washer, wipe surfaces regularly with clean water or a neutral detergent to remove deposits; avoid direct contact with dissimilar metals during installation; in high-salt or aggressive environments, switch to 316-grade 1.5 inch flat washer and apply an anti-corrosion coating.
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