GB/T 97

Plain Washer

300HV

GB/T 97 Plain Washer for applications that specify this hardness level. State the nominal size, material, finish, quantity and packaging requirements in the RFQ.

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Core parameters

Product and RFQ Fields

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Product standardGB/T 97

Specification standardGB/T 97.1-2002

Product typePlain Washer

Hardness level300HV

Nominal rangeΦ1.6–Φ64

MaterialConfirm in the order specification

FinishBlack oxide / blue-white zinc / yellow zinc / hot-dip galvanized / mechanical zinc / Dacromet / zinc-nickel / Teflon

PackagingConfirm quantity, transport and marking requirements

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.

Plain washer: cross-section and dimensional symbols — 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 ↓

GB/T 97.1-2002 product grade A dimensions in millimetres. Mass per 1,000 pieces is an approximate value for steel.
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.

China National Standards Open System: GB/T 97.1-2002

Technical Requirements

Product Requirements

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Material Categories

Steel and stainless-steel options are available for confirmation. State the material grade and any certification requirement in the order.

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

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 A

GB/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 97.1-2002

DINCurrent German reference

DIN EN ISO 7089:2000-11

Plain washers — Normal series — Product grade A

Public 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 97.1-2002

DINHistorical 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 97.1-2002

Product description

What the Product Is

GB/T 97 Plain Washer in 300HV is identified by its standard, hardness and nominal size. An RFQ should also state the material, finish and quantity.

Structure

This product is a plain washer. Review the dimension table and agreed technical document for dimensions and tolerances.

Selection

Confirm the standard edition, hardness, nominal size, material, finish, packaging, marking and inspection-document requirements.

Comparison with Similar Products

Compare the standard number, hardness and complete dimensional fields before considering a substitution.

FAQ

GB/T 97 300HV Questions

01What is GB/T 97 300HV?

GB/T 97 Plain Washer in 300HV is identified by its product standard, hardness level and nominal size. Add material, finish, quantity and packaging requirements to the RFQ.

02How should the dimensions be confirmed?

Use the GB/T 97.1-2002 dimension table for the selected nominal size, then confirm the standard edition and any drawing or inspection requirements in the order.

03Which finishes can be quoted?

Black oxide, blue-white zinc, yellow zinc, hot-dip galvanizing, mechanical zinc plating, Dacromet, zinc-nickel alloy plating and Teflon coating can be quoted, subject to technical review for the selected size, material and hardness.

Other Hardness Levels

01140HVGB/T 97 Plain Washer 02200HVGB/T 97 Plain Washer 03300HVCurrent product

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Recommended descriptionGB/T 97 · 200HV · M16 · 50,000 PCS

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Plain Washer

Product and RFQ Fields

GB/T 97.1-2002 Dimensions

Product Drawing

Plain Washer

Product Requirements

Material Categories

Coating References

Hardness and Defects

Acceptance and Packaging

International Cross-References

ISO 7089:2000

DIN EN ISO 7089:2000-11

DIN 125-1:1990

What the Product Is

Structure

Selection

Comparison with Similar Products

GB/T 97 300HV Questions

Other Hardness Levels

Request a Product Quote