ISO 7092:2000 PDF

Overview

ISO 7092:2000 - Plain washers - Small series - Product grade A - defines the characteristics, sizes and quality requirements for plain (flat) washers, small series, product grade A. The standard covers washers with nominal thread diameters from 1.6 mm to 36 mm and two Vickers hardness classes: 200 HV and 300 HV. It is intended to ensure interchangeability, appropriate mechanical performance and consistent quality of small-series flat washers used with metric fasteners.

Key topics and technical requirements

• Size and dimensions: Preferred and non‑preferred dimensions are specified in figures and in Tables 1 and 2 (nominal hole, outer diameter and thickness values for d = 1.6 mm … 36 mm).
• Hardness classes: Two classes - 200 HV (suitable for many common screws) and 300 HV (for higher-strength socket-head screws up to class 10.9). Hardness testing follows ISO 6507-1 (Vickers hardness test).
• Compatibility with fasteners:
  • 200 HV washers: suitable with cylindrical‑head screws (including hexagon‑socket and internal‑lobed types) up to property class 8.8 and stainless fasteners; also for some self‑tapping/case‑hardened screws as noted in the standard.
  • 300 HV washers: suitable for higher strength hexagon‑socket and internal‑lobe cylindrical‑head screws up to class 10.9.
• Materials and mechanical properties: Materials and mechanical grades are referenced to ISO 3506-1 for stainless steels and to appropriate agreements for other metals.
• Surface finish and coatings: Guidance on coatings and avoidance of hydrogen embrittlement is given; electrolytic coatings follow ISO 4042 and non‑electrolytic zinc flake coatings reference ISO 10683.
• Tolerances and quality: Dimensional tolerances are referenced to ISO 4759-3; acceptance and receiving inspection procedures follow ISO 3269.
• Designation: Standard example format - e.g., “Rondelle ISO 7092‑8‑200 HV” or “Rondelle ISO 7092‑8‑200 HV‑A2” for stainless material.

Applications and users

Practical use cases:

• General mechanical assemblies where standardized flat washers are required for load distribution, spacing or protection of mating surfaces.
• Small‑series production runs for machinery, automotive components, electronics enclosures and fastener kits.

Who uses ISO 7092:

• Design and mechanical engineers specifying fasteners and washers.
• Fastener manufacturers and suppliers producing to international tolerances.
• Quality inspectors and procurement teams ensuring compliance and interchangeability.
• Maintenance engineers and OEMs standardizing replacement parts.

Related standards

• ISO 887 (plain washers - general plan)
• ISO 4759-3 (tolerances for flat washers)
• ISO 3269 (acceptance inspection)
• ISO 3506-1 (stainless steel fastener properties)
• ISO 4042 (electroplating of fasteners)
• ISO 6507-1 (Vickers hardness test)
• ISO 10683 (non‑electrolytic zinc flake coatings)

Keywords: ISO 7092, plain washers, small series, product grade A, washer dimensions, Vickers hardness, fastening standards, ISO standards.