ISO 7093-2:2000 PDF

Plain washers — Large series — Part 2: Product grade C

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Title (English):

ISO 7093-2:2000

Plain washers — Large series — Part 2: Product grade C

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 4
Publication date:: June 8, 2000
Edition:: ISO IS 7093 edition 1 version 1
ICS:: 21.060.30

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Description (English):

La présente partie de l'ISO 7093 spécifie les caractéristiques des rondelles plates, série large, de grade C, de classe de dureté 100 HV et de diamètre nominal (diamètre nominal de filetage) de 3 mm à 36 mm inclus. Les rondelles conformes à la présente partie de l'ISO 7093 sont prévues pour être utilisées dans les cas de serrage d'éléments en métal doux ou de larges trous de passage dans la pièce. Toutefois, dans le dernier cas, il convient de vérifier l'aptitude à l'emploi de l'épaisseur de rondelle. Les rondelles de classe de dureté 100 HV conviennent à des - vis hexagonales de grade Cet de classes de qualité jusqu'à 6.8 inclus; - écrous hexagonaux de grade C et de classes de qualité jusqu'à 6 inclus; - vis autotaraudeuses par déformation, cémentées et trempées. Si des dimensions différentes de celles données dans la présente partie de l'ISO 7093 sont requises, il convient de les choisir parmi celles données dans l'ISO 887.

Technical details

Technical committee: ISO/TC 2 - Fasteners
SKU: ISO 7093-2:2000

Abstract

Overview

ISO 7093-2:2000 specifies plain washers - large series - Part 2: product grade C. It defines the dimensional, material and hardness characteristics for large-series plain (flat) washers of grade C with a nominal thread diameter range 3 mm to 36 mm and a hardness class of 100 HV. The standard is intended for washers used where bolts or nuts bear on soft metal parts or where oversized clearance holes require a larger washer face.

Key topics and technical requirements

Scope and range: Covers plain (flat) washers, large series, grade C, nominal thread diameters from 3 mm to 36 mm inclusive.
Hardness: Washers are specified as 100 HV (Vickers). Hardness testing follows ISO 6507-1, with HV10 test load for nominal thicknesses 0.6–1.2 mm and HV30 for thicker washers.
Dimensions: Preferred and non‑preferred dimensions (bore diameters, outside diameters, and thicknesses) are given in the standard (see Tables 1 and 2 and Figure 1). Designers should select dimensions from ISO 887 when alternate sizes are needed.
Material and finish: Typical material is steel; other metallic materials may be used by agreement. Surface conditions include supplied “as manufactured,” with protective lubricant, or with coatings per ISO 4042 (electrolytic) or ISO 10683 (non‑electrolytic zinc flake).
Compatibility: 100 HV washers are suitable for use with hexagon bolts of grade C up to property class 6.8, hexagon nuts grade C up to class 6, and certain self‑tapping or case‑hardened screws (per the standard text).
Tolerances and acceptance: Dimensional tolerances reference ISO 4759-3; reception and inspection follow ISO 3269. Parts must be free of burrs and harmful defects.

Applications and users

Who uses it: Fastener manufacturers, mechanical design engineers, purchasing/procurement teams, quality/inspection personnel, and maintenance engineers.
Typical applications: General engineering assemblies where a larger bearing surface is needed - protecting soft mating materials, distributing clamping loads over oversized holes or clearances, and standardizing washer supply for production lines.
Benefits: Ensures interchangeability, consistent mechanical performance (hardness and dimensions), and proper coating/inspection practices across international supply chains.

Related standards

ISO 7093-1 (Part 1: Grade A)
ISO 887 (flat washers - general plan)
ISO 4759-3 (tolerances for washers)
ISO 4042 (electrolytic coatings)
ISO 10683 (non-electrolytic zinc flake coatings)
ISO 3269 (acceptance inspection)
ISO 6507-1 (Vickers hardness test)

Keywords: ISO 7093-2, plain washers, large series, product grade C, 100 HV washer, metric washers, fastener standards, washer dimensions, ISO washer specification.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and range: Covers plain (flat) washers, large series, grade C, nominal thread diameters from 3 mm to 36 mm inclusive.
Hardness: Washers are specified as 100 HV (Vickers). Hardness testing follows ISO 6507-1, with HV10 test load for nominal thicknesses 0.6–1.2 mm and HV30 for thicker washers.
Dimensions: Preferred and non‑preferred dimensions (bore diameters, outside diameters, and thicknesses) are given in the standard (see Tables 1 and 2 and Figure 1). Designers should select dimensions from ISO 887 when alternate sizes are needed.
Material and finish: Typical material is steel; other metallic materials may be used by agreement. Surface conditions include supplied “as manufactured,” with protective lubricant, or with coatings per ISO 4042 (electrolytic) or ISO 10683 (non‑electrolytic zinc flake).
Compatibility: 100 HV washers are suitable for use with hexagon bolts of grade C up to property class 6.8, hexagon nuts grade C up to class 6, and certain self‑tapping or case‑hardened screws (per the standard text).
Tolerances and acceptance: Dimensional tolerances reference ISO 4759-3; reception and inspection follow ISO 3269. Parts must be free of burrs and harmful defects.

Applications and users

Who uses it: Fastener manufacturers, mechanical design engineers, purchasing/procurement teams, quality/inspection personnel, and maintenance engineers.
Typical applications: General engineering assemblies where a larger bearing surface is needed - protecting soft mating materials, distributing clamping loads over oversized holes or clearances, and standardizing washer supply for production lines.
Benefits: Ensures interchangeability, consistent mechanical performance (hardness and dimensions), and proper coating/inspection practices across international supply chains.

Related standards

ISO 7093-1 (Part 1: Grade A)
ISO 887 (flat washers - general plan)
ISO 4759-3 (tolerances for washers)
ISO 4042 (electrolytic coatings)
ISO 10683 (non-electrolytic zinc flake coatings)
ISO 3269 (acceptance inspection)
ISO 6507-1 (Vickers hardness test)

Keywords: ISO 7093-2, plain washers, large series, product grade C, 100 HV washer, metric washers, fastener standards, washer dimensions, ISO washer specification.

ISO 7093-2:2000 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2023)

Elastomeric parts for parenterals and for devices for pharmaceutical use - Part 5: Functional requirements an…

Fasteners - Electroplated coating systems - Amendment 1 (ISO 4042:2022/Amd 1:2026)

Fasteners - Non-electrolytically applied zinc flake coating systems (ISO 10683:2018)

Tolerances for fasteners - Part 3: Washers for bolts, screws and nuts - Product grades A, C and F (ISO 4759-3…

Fasteners - Acceptance inspection (ISO 3269:2019)

Plain washers — Large series — Part 1: Product grade A

Plain washers - Large series - Part 2: Product grade C (ISO 7093-2:2000)