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Better Fastener Industry Co., Ltd. is a China-based Washers manufacturer supplying plain, spring, lock, retaining and specialty washers in carbon steel, stainless steel, spring steel, brass and non-metallic materials. Our washer range sits alongside our Bolts and Nuts programmes, so a single bolted joint can be specified, produced and packed as one coordinated supply package.
We were founded in 2001 as a washer factory and expanded into a comprehensive fastener enterprise in 2010. Washers remain our core competence: load distribution, surface protection, vibration resistance and preload retention are the four functions our range is built around.
Our Washer Range and Where Each Type Fits
Each washer family solves a different joint problem. The table below maps our supplied range to its working principle, typical joint conditions and the standards we produce against.
| Washer Type | Function in the Joint | Typical Application | Reference Standards |
|---|---|---|---|
| Plain Washers | Spread bearing load, protect substrate, provide a consistent bearing face | Structural steelwork, machinery frames, furniture and architectural hardware | DIN 125, DIN 134, DIN 7349, ISO 7089, ANSI B18.22M, JIS B 1256, ASME/ANSI B18.21.1, ASTM F436 |
| Spring Washers | Store elastic energy, maintain contact pressure, compensate thermal movement | Automotive assemblies, outdoor machinery, electrical panels, cyclic-load joints | DIN 127, DIN 128, DIN 137, DIN 7980, DIN 2093, JIS B 1251, ISO 7090 |
| Lock Washers | Serrated teeth bite into nut face and workpiece to resist rotation | Precision instruments, bearing assemblies, high-speed motor mounts, electronics | DIN 6797, DIN 6798, DIN 25201 |
| Retaining Rings | Axial location of components on shafts and in bores | Gearboxes, bearing seats, shafts and housings | DIN 471 external series and matching internal series |
| Other Washers | Sealing, seating and alignment functions | Fiber sealing washers, conical and spherical seat washers, clevis pin washers | DIN 6319 Type G and Type C, DIN 1440, HB 1 510 fiber washer |
Materials and Surface Finishes
Material selection follows the joint environment rather than a default grade. We produce washers in carbon steel, stainless steel, spring steel, brass and non-metallic materials such as fiber, and we match the finish to the corrosion exposure and the mating fastener coating.
- Carbon steel with zinc plating, hot-dip galvanizing or blackening for general machinery, construction and automotive structures.
- Stainless steel for outdoor, marine-adjacent, food-adjacent and chemical environments where coating damage would start corrosion.
- Spring steel, hardened, for split spring washers and toothed lock washers where elastic recovery or tooth penetration is the working principle.
- Hardened steel for high-strength structural washers such as ASTM F436 inch-series hardened steel washers used under high-preload bolting.
- Fiber and non-metallic grades for sealing and electrical insulation duties.
Critical Specifications We Work To
For a Stainless Steel Washers, the specification is defined by a small set of dimensions and properties. These are the parameters we confirm before production:
- Inside diameter and outside diameter — must clear the bolt shank and still provide the required bearing footprint.
- Thickness and thickness tolerance — controls bearing area and, for spring and lock types, the elastic or penetration behaviour.
- Hardness — relevant for hardened flat washers, spring washers and toothed lock washers; DIN 125-1 Grade A assembly washers are specified at 250 HV and below.
- Flatness and burr condition — smooth, burr-free stamping supports clean mating with standard bolt and nut sizes.
- Coating thickness and finish — matched to the mating fastener and the corrosion class of the installation.
Standards Coverage Across Fastening Systems
Our washers are manufactured to DIN, ISO, ANSI, ASME, BS, EN, GOST, JIS, AS and KS specifications so that a washer from our range interoperates with the bolt and nut system already specified on your drawing. Representative items in production include:
Production, Capacity and Quality Control
Washers are formed by high-speed stamping, which gives us smooth, burr-free surfaces and consistent dimensional tolerances across long runs. Our manufacturing base operates 12 energy-efficient production lines, including a fully automatic shell moulding line and four heat treatment lines, with annual output exceeding 20,000 tons. That capacity supports large batch programmes while remaining responsive to small and medium batch purchases.
Quality control runs through the whole process rather than at final inspection only. Inspections are carried out after each process step, and finished washers are inspected against customer requirements and the applicable international standard. Our laboratory is equipped with a spectrometer, CMM, X-ray flaw detector and complementary testing equipment, covering chemical composition, mechanical properties, non-destructive testing and geometric dimensions.
Post-treatment processes including hot-dip galvanizing and blackening are handled in-house, which lets us manage complex shapes, sizes and material combinations without splitting responsibility across suppliers.
Customization and Joint-Level Matching
Customized production is our core business. We develop and manufacture washers from your drawings or samples, including non-standard outside diameters, special thicknesses, non-standard hole sizes and application-specific seat geometries. Because we also produce Other Nuts and the full bolt range, we can align washer bore, bearing face and hardness with the mating fastener so the assembled joint behaves as specified rather than as three separately sourced parts.
Packaging, Delivery and Documentation
Washers are supplied in mixed matching packaging, customizable small packaging and retail-ready formats, which supports both batch industrial orders and distribution requirements. DDP delivery is available to move goods directly to your door, and our location within roughly a two-hour drive of Shanghai and Ningbo ports keeps sea freight efficient, with air freight via Ningbo or Shanghai airports for urgent deliveries.
Information We Use to Configure Your Solution
A washer quotation is only useful if it matches the joint. We prepare our configuration and price from the following inputs:
- Standard reference (DIN, ISO, ANSI, ASME, JIS, BS, EN, GOST, AS, KS) or a drawing with full dimensions.
- Inside diameter, outside diameter and thickness, with tolerances where the joint is sensitive.
- Material and surface finish, plus the corrosion environment and the mating fastener coating.
- Hardness or property class requirement for hardened, spring and lock types.
- Annual volume, batch size and delivery schedule.
- Packaging format — bulk carton, mixed matching kit, small retail pack or custom box.
- Inspection and documentation requirements for acceptance, including any third-party inspection arrangement.
Frequently Asked Questions
Which washer type should be used for a vibrating joint?
For continuous cyclic loading, a split spring washer maintains contact pressure as the joint flexes, while a toothed lock washer adds mechanical interlock by biting into the nut face and workpiece. Where preload is high and the joint is structural, a hardened flat washer such as an ASTM F436 inch-series washer is normally used beneath the nut or bolt head. We confirm the choice against the load case, surface hardness and whether the joint sees thermal cycling.
Can you produce washers to a drawing rather than a published standard?
Yes. Customized production is our core business, and we develop washers from drawings or samples. Non-standard outside diameters, special thicknesses, non-standard bore sizes and seat geometries are all within our normal scope. Send the drawing with material, finish, hardness and volume, and we will confirm the configuration.
How is washer quality verified before shipment?
Inspections are performed after each process step, and finished washers are inspected against customer requirements and the applicable international standard. Our laboratory covers chemical composition by spectrometer, dimensional measurement by CMM, non-destructive testing by X-ray flaw detector, and mechanical property checks. Inspection records are prepared according to the documentation agreed for the order.
Do you supply washers together with matching bolts and nuts?
We do. Our range covers bolts, nuts and washers, so a bolted assembly can be consolidated into one supply programme with matched materials and finishes. This is common for construction machinery, rail transportation, automotive and building hardware projects where the joint is specified as a complete set.
What packaging options are available for washers?
We offer mixed matching packaging, customizable small packaging and export cartons. Mixed matching kits are used where a distributor sells a bolt, nut and washer set as one item, while bulk cartons suit high-volume production feeding. Packaging format is confirmed during quotation so it matches your sales channel and handling equipment.
How quickly will we receive a response to an inquiry?
On working days we respond within 12 hours of receiving an inquiry. To prepare a usable configuration and quotation in that first response, include the standard or drawing, dimensions, material, finish, hardness requirement, annual volume and packaging format.
