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Washer
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Washer

Last Updated: July 25, 2026

Starting From 48Rs/Pcs

A washer is a fundamental, thin, disc-shaped mechanical fastener component featuring a central hole designed to distribute the compressive load of a threaded bolt, screw, or nut face over a wider surface area. It works by sandwiching between the fastener head or nut face and the joint surface, preventing localized surface crushing, galling, or indentation into softer base materials during tightening. Beyond basic load distribution, specialized washer profiles—such as spring, Belleville, wave, and tooth-locking variants—provide essential secondary functions including pre-load retention, vibration-proof thread locking, electrical grounding, and fluid joint sealing.

Technical Specifications of Washer In India

Size / Outer Diameter Range M2 to M100 (Metric) / #2 to 4" (Imperial standard)
Thickness Range 0.5 mm to 20 mm
Specification (All sizes available)
Washer Types / Styles Plain / Flat Washer (Type A & B), Heavy Duty Flat Washer, Fender / Mudguard Washer (Wide OD), Split Spring Lock Washer, Belleville / Conical Spring Washer, Tooth Lock Washer (Internal / External), Wave Washer, Spherical Washer, Square Washer, Sealing Washer (Bonded EPDM/Neoprene)
Material Grades Carbon Steel: IS 2062, Class 4.6, 8.8, 10.9, 12.9, ASTM A307, ASTM A325 / F436
High-Strength Alloy Steel ASTM A193 B7/B7M, ASTM A194, ASTM F436 Hardened Steel
Stainless Steel AISI 304 (A2-70/80), AISI 316 (A4-70/80), 316L, 321, 347, Duplex 2205, Super Duplex 2507
High Nickel Alloy & Non-Ferrous Monel 400/K500, Inconel 600/625/718, Incoloy 800/825, Hastelloy C22/C276, Titanium Grade 2/5, Brass, Copper, Phosphor Bronze
Specification (All Grades available)
Standards & Specifications DIN 125, DIN 9021, DIN 127, DIN 6796, ASME/ANSI B18.21.1, ASME B18.22.1, ISO 7089, ISO 7093, ASTM F436
Surface Finish Plain Black / Oiled, Electro-Zinc Plated, Hot-Dip Galvanized (HDG), Yellow Zinc Passivated, PTFE / Teflon Coated, Dacromet / Geomet, Bright Electro-Polished (SS)
Origin Indian / Imported

Sourcing Terms & Timeline

Payment Terms

Letter of Credit / Bank Transfer / Advance

Delivery Package

Mill Test Certificate (MTC) + Inspection Reports

Standard Delivery

2-5 Working Days in Maharashtra region

Custom Cuts Support

Custom length cutting & shearing facilities available

Verified Suppliers

Shrushti Metal

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Benefits and Application of Washer

Benefits

  • Optimized Load Distribution: Spreads high axial clamping forces evenly over a broader surface area, preventing damage, distortion, or surface crushing of joint members.

  • Surface Protection Against Galling: Acts as a smooth bearing interface that prevents the rotating fastener head or nut from gouging and scoring base material surfaces during torque application.

  • Vibration and Creep Compensation: Spring and locking washer variants maintain continuous tension, preventing threaded components from loosening under dynamic physical vibration or thermal expansion.


  • Applications

    Washers are essential load-distributing and locking accessories utilized across every major industrial sector to secure flanged piping, structural steelwork, and mechanical machinery. In high-pressure oil refineries and chemical plants, hardened carbon steel (ASTM F436) and Stainless Steel (316/316L) flat washers are paired with heavy hex bolts to ensure uniform flange gasket compression without galling the flange back-faces. Civil infrastructure, building construction, and bridge projects depend on hot-dip galvanized structural washers to distribute massive tension loads across structural steel beams and anchor bolt assemblies exposed to harsh atmospheric conditions. Thermal power stations and heavy machinery builders utilize spring steel Belleville and conical washers on high-temperature turbine casings and high-vibration pump skids to maintain pre-load tension despite thermal expansion cycles. Additionally, marine engineering platforms, subsea pipelines, and offshore oil rigs employ corrosion-proof Super Duplex and High Nickel Alloy washers across underwater manifold structures to resist rapid chloride-induced crevice corrosion and galvanic breakdown.

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VIVEK INDUSTRIES APEX INFRASTRUCTURE MUMBAI METRO METALLICS GODREJ METALS TATA INFRA
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Hot Dip Galvanizing

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Flat-bed truck logistics matching tight construction schedules in Mumbai.

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