Material Categories
Steel and stainless-steel options are available for confirmation. State the material grade and any certification requirement in the order.
GB/T 97
Plain Washer
GB/T 97 plain washers are available in 140HV, 200HV and 300HV. State the hardness, nominal size, material, finish and quantity in the RFQ.
Specification standardGB/T 97.1-2002Product grade A · Φ1.6–Φ64
GB/T 97Product Options
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Product specifications
Product Specifications
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Product standardGB/T 97
Specification standardGB/T 97.1-2002
Product typePlain Washer
Nominal rangeΦ1.6–Φ64
Hardness levels140HV / 200HV / 300HV
RFQ informationConfirm material, finish, quantity, packaging and documents
Specification table
GB/T 97.1-2002 Dimensions
Search, copy or scroll through the dimensional rows, then confirm the edition and order requirements in the RFQ.
Technical Drawing
Product Drawing
Plain Washer
- d
- Hole diameter
- dc
- Outside diameter
- h
- Thickness
Read these symbols alongside the dimension table below. Confirm the standard edition and order drawing for the selected size.
View full-size drawing ↗Download drawing ↓| Nominal size | d min | d max | dc max | dc min | h nominal | h max | h min | Mass/1,000≈kg | Preference |
|---|---|---|---|---|---|---|---|---|---|
| Φ1.6 | 1.7 | 1.84 | 4 | 3.7 | 0.3 | 0.35 | 0.25 | 0.024 | Preferred |
| Φ2 | 2.2 | 2.34 | 5 | 4.7 | 0.3 | 0.35 | 0.25 | 0.037 | Preferred |
| Φ2.5 | 2.7 | 2.84 | 6 | 5.7 | 0.5 | 0.55 | 0.45 | 0.088 | Preferred |
| Φ3 | 3.2 | 3.38 | 7 | 6.64 | 0.5 | 0.55 | 0.45 | 0.119 | Preferred |
| Φ4 | 4.3 | 4.48 | 9 | 8.64 | 0.8 | 0.9 | 0.7 | 0.308 | Preferred |
| Φ5 | 5.3 | 5.48 | 10 | 9.64 | 1 | 1.1 | 0.9 | 0.443 | Preferred |
| Φ6 | 6.4 | 6.62 | 12 | 11.57 | 1.6 | 1.8 | 1.4 | 1.02 | Preferred |
| Φ8 | 8.4 | 8.62 | 16 | 15.57 | 1.6 | 1.8 | 1.4 | 1.83 | Preferred |
| Φ10 | 10.5 | 10.77 | 20 | 19.48 | 2 | 2.2 | 1.8 | 3.57 | Preferred |
| Φ12 | 13 | 13.27 | 24 | 23.48 | 2.5 | 2.7 | 2.3 | 6.27 | Preferred |
| Φ14 | 15 | 15.27 | 28 | 27.48 | 2.5 | 2.7 | 2.3 | 8.62 | Non-preferred |
| Φ16 | 17 | 17.27 | 30 | 29.48 | 3 | 3.3 | 2.7 | 11.3 | Preferred |
| Φ18 | 19 | 19.33 | 34 | 33.38 | 3 | 3.3 | 2.7 | 14.7 | Non-preferred |
| Φ20 | 21 | 21.33 | 37 | 36.38 | 3 | 3.3 | 2.7 | 17.16 | Preferred |
| Φ22 | 23 | 23.33 | 39 | 38.38 | 3 | 3.3 | 2.7 | 18.35 | Non-preferred |
| Φ24 | 25 | 25.33 | 44 | 43.38 | 4 | 4.3 | 3.7 | 32.33 | Preferred |
| Φ27 | 28 | 28.33 | 50 | 49.38 | 4 | 4.3 | 3.7 | 42.32 | Non-preferred |
| Φ30 | 31 | 31.39 | 56 | 55.26 | 4 | 4.3 | 3.7 | 53.64 | Preferred |
| Φ33 | 34 | 34.62 | 60 | 58.8 | 5 | 5.6 | 4.4 | 75.34 | Non-preferred |
| Φ36 | 37 | 37.62 | 66 | 64.8 | 5 | 5.6 | 4.4 | 92.07 | Preferred |
| Φ39 | 42 | 42.62 | 72 | 70.8 | 6 | 6.6 | 5.4 | 126.5 | Non-preferred |
| Φ42 | 45 | 45.62 | 78 | 76.8 | 8 | 9 | 7 | 200.2 | Preferred |
| Φ45 | 48 | 48.62 | 85 | 83.6 | 8 | 9 | 7 | 242.7 | Non-preferred |
| Φ48 | 52 | 52.74 | 92 | 90.6 | 8 | 9 | 7 | 284.1 | Preferred |
| Φ52 | 56 | 56.74 | 98 | 96.6 | 8 | 9 | 7 | 319 | Non-preferred |
| Φ56 | 62 | 62.74 | 105 | 103.6 | 10 | 11 | 9 | 442.7 | Preferred |
| Φ60 | 66 | 66.74 | 110 | 108.6 | 10 | 11 | 9 | 477.4 | Non-preferred |
| Φ64 | 70 | 70.74 | 115 | 113.6 | 10 | 11 | 9 | 513.2 | Preferred |
Standard references
Dimension fields are organised to GB/T 97.1-2002. State the standard edition, nominal size and delivery requirements in the RFQ.
Technical Requirements
Product Requirements
Confirm material, finish, inspection, marking and packaging requirements for the selected product.
Coating References
Specify the surface treatment system, such as electroplating or non-electrolytic zinc flake coating, together with the required finish.
Hardness and Defects
Hardness testing and limits for harmful irregularities or protruding burrs form part of product acceptance.
Acceptance and Packaging
Agree acceptance, marking and packaging requirements during quotation, including lot identification and delivery documents.
Surface Finishes
Surface Finishes
Choose the finish to suit your application.
Explore how each finish is made and what it offers.01Black OxideChemical Conversion · Black Finish
Black oxide is a chemical conversion process that forms a black oxide film on iron or steel. It retains the underlying metal texture and is commonly followed by oiling, waxing or sealing.
Process Characteristics
The thin conversion film has little effect on dimensions and suits mechanical parts requiring a dark finish. Corrosion protection depends largely on the subsequent oil or sealant layer.
03Yellow Zinc PlatedZinc Electroplating · Coloured Passivation
Yellow zinc uses coloured passivation over an electroplated zinc layer, producing yellow, gold or iridescent tones. Zinc remains the underlying protective layer; the passivation film creates the surface colour.
Process Characteristics
It combines a distinctive metallic appearance with corrosion protection. Colour intensity does not indicate a corrosion-resistance grade; performance depends on the complete coating and post-treatment system.
05Mechanical Zinc PlatingBarrel Deposition · Mechanical Bonding
Mechanical zinc plating tumbles parts with zinc powder, glass beads and process chemicals in a barrel. The beads repeatedly impact the surface, building a mechanically bonded zinc coating with a typically matt grey appearance.
Process Characteristics
Deposition does not use an electric current and is suited to small parts such as washers and fasteners. Coverage depends on geometry and access for the beads, so deep holes and recesses can be difficult to coat evenly.
07Zinc-Nickel Alloy PlatingAlloy Electroplating · Corrosion Protection
Zinc-nickel plating co-deposits zinc and nickel onto a part by electroplating, followed by passivation or sealing. It can have a silver-grey appearance or other colours depending on the post-treatment.
Process Characteristics
The alloy deposit, passivation and sealer work together to provide corrosion protection for automotive and industrial fasteners. Performance depends on alloy composition, coating thickness and post-treatment.
02Blue-White Zinc PlatedZinc Electroplating · Blue Passivation
Blue-white zinc combines an electroplated zinc layer with blue or clear passivation. The resulting surface is typically silver-white with a slight blue tint, a familiar finish on washers and other fasteners.
Process Characteristics
Zinc provides sacrificial protection for the steel, while passivation slows corrosion of the zinc layer. The finish is relatively bright; corrosion performance depends on coating thickness, passivation and sealing.
04Hot-Dip GalvanizedMolten-Zinc Immersion · Protective Coating
Hot-dip galvanizing immerses cleaned iron or steel parts in molten zinc. Zinc reacts with the steel to form zinc-iron alloy layers beneath an outer zinc layer, typically giving a silver-grey appearance.
Process Characteristics
The generally substantial coating protects steel through both a physical barrier and sacrificial zinc action. It is widely used for outdoor and structural components, with coating build-up affecting holes and assembly clearances.
06DacrometZinc-Aluminium Flakes · Heat Curing
Dacromet is a non-electrolytic zinc-aluminium flake coating. A coating containing zinc and aluminium flakes is applied by dipping, dip-spin or spraying, then heat-cured to form a silver-grey protective layer.
Process Characteristics
Overlapping flakes create a barrier, supported by sacrificial zinc protection. Commonly used on fasteners, its performance varies with the formulation, topcoat and curing conditions.
08Teflon CoatingFluoropolymer Coating · Low Friction
Teflon coatings use fluoropolymer formulations, including PTFE-based systems. Application and curing create a functional film on the part, with colours such as blue or black depending on the formulation.
Process Characteristics
Key properties include low friction, nonstick behaviour and chemical resistance, supporting sliding and release applications. Temperature capability, wear resistance and protective performance vary by coating system.
DIN / ISO Cross-reference
International Cross-References
GB/T 97.1-2002 is linked to ISO 7089:2000 through adoption. DIN EN ISO 7089:2000-11 is the corresponding German edition, while DIN 125-1:1990 is a historical market reference. Check revision, hardness, dimensions, tolerances and finish before substitution.
ISOAdopted reference
ISO 7089:2000
Plain washers — Normal series — Product grade AGB/T 97.1-2002 is linked to ISO 7089:2000 through adoption. Confirm revision, material, hardness, finish and tolerances before substitution.
ReferenceChina National Standards Open System: GB/T 97.1-2002DINCurrent German reference
DIN EN ISO 7089:2000-11
Plain washers — Normal series — Product grade APublic DIN catalogue records identify DIN EN ISO 7089:2000-11 as the German version of ISO 7089:2000.
ReferenceChina National Standards Open System: GB/T 97.1-2002DINHistorical market reference
DIN 125-1:1990
Plain washers, product grade A (historical market reference)Historical purchasing documents often cross-reference DIN 125-1:1990 with GB/T 97.1. Current orders should preferably use DIN EN ISO 7089 and verify hardness grouping and revision.
ReferenceChina National Standards Open System: GB/T 97.1-2002Technical reading
Related Resources
Standards and dimensions01
GB/T 96 vs GB/T 97: What Is the Difference?
A practical comparison of product structure, outside-diameter series, nominal ranges and available hardness levels.
Product knowledge02
What Do 140HV, 200HV and 300HV Mean?
How hardness levels support washer identification, selection and purchasing communication.
Product knowledge03
Why Washer Hardness Matters
Why hardness must be explicit in product identification, selection and lot communication.
FAQ
GB/T 97 Questions
01What is GB/T 97?
GB/T 97 Plain Washer is a RINGRHINO product family. This page provides the applicable standard, product structure, nominal range and ordering information.
02Can a DIN or ISO number be substituted directly?
GB/T 97.1-2002 is linked to ISO 7089:2000 through adoption. DIN EN ISO 7089:2000-11 is the corresponding German edition, while DIN 125-1:1990 is a historical market reference. Check revision, hardness, dimensions, tolerances and finish before substitution.
03Which information belongs in an RFQ?
State the standard and edition, hardness or material state, nominal size, material, finish, quantity, packaging and document requirements.
Request for quotation
Request a Product Quote
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Recommended descriptionGB/T 97 · 200HV · M16 · 50,000 PCS
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