ISO 7092:2000 download.Plain washers – Small series – Product grade A.
ISO 7092 specifies the characteristics of small-series, product-grade-A plain washers in the
200 HV and 300 HV hardness classes and of nominal sizes (nominal thread diameters) ranging from 1,6 mm to
36 mm inclusive.
Washers of hardness class 200 HV are suitable for
-— cheese head screws in property classes up to and including 8.8, or made of stainless steel;
— hexagon socket head cap screws in property classes up to and including 8.8, or made of stainless steel; hexalobular socket head cap screws in property classes up to and including 8.8. or made of stainless steel;
— case-hardened thread rolling screws with cheese heads.
Washers of hardness class 300 HV are suitable for
— hexagon socket head cap screws in property classes up to and including 10.9;
— hexalobular socket head cap screws in property classes up to and including 10.9,
If dimensions other than those listed in ISO 7092 are required, they should be selected from those given in ISO 887.
When soft material pieces are clamped, or large clearance holes in the workpiece are used, the user should check the technical suitability of this type of washer.
2 Normative references
The following normative documents contain provisions which, through reference In this text, constitute provisions of ISO 7092. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on ISO 7092 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 887:2000, Plain washers for metric bolts, screws arid nuts for general purposes — General plan. ISO 3269:2000, Fasteners — Acceptance inspection.
ISO 3506-1:1997, Mechanical properties of corrosion-resistant stainless-steel fasteners — Part 1: Bolts, screws and studs.
ISO 4042:1999. Fasteners — Electroplated coatings.
ISO 4759-3:2000, Tolerances for fasteners — Part 3: Plain washers for bolts, screws and nuts — Product grades A and C.
ISO 6507-1:1997, Metallic materials — Vickers hardness test — Part 1: Test method. ISO 1 0683_i), Fasteners — Non-electrolytically applied zinc flake coatings.
3 Dimensions
See Figure 1 and Tables 1 and 2.
5 Designation
EXAMPLE I A small-senes, product-grade-A plain washer made of steel, of nominal size 8 mm and hardness class 200 HV Is designated as follows:
Washer ISO 7092-8-200 HV
EXAMPLE 2 A small series, product-grade-A plain washer made of grade A2 stainless steel, of nominal size 8 mm and hardness class 200 HV is designated as follows:
Washer ISO 7092-8-200 HV-A2.