How are the products packaged?

Standard packaging is 20-25 kg per carton, with 36 or 48 cartons per pallet (approx. 900-960 kg). Custom packaging with customer logos is available.

Can I visit your factory?

Of course. We welcome factory visits. Please contact us in advance to arrange transportation from the airport or train station.

What materials are available?

We offer Stainless Steel (SS201, SS303, SS304, SS316, SS904L) and Carbon Steel with finishes like Zinc Plated, HDG, Black Oxide, and more.

Hardened Circular Washer ASTM F436, ASTM F436 Hardened Structural Flat Washers, HDG Structural Flat Washers

Name: Hardened Circular Washer ASTM F436, ASTM F436 Hardened Structural Flat Washers, HDG Structural Flat Washers
Brand: Bolnut Fastener Co., Ltd
SKU: 2241227095

Jiangsu, ChinaBolnut Fastener Co., Ltd

US$0.10

1 Piece

Sample price:US$0.10/piece.Request sample

Product profile

Customization

Available

Type

Flat Gasket

Material

Stainless Steel/Carbon Steel

Model NO.

F436

Combination Washer Structure

A Type

Combination Washer Packaging

Spring Washer Type

Name

Flat Structural Washers F436

Finish

Black, Zinc Plated, HDG

Sample

Available

MOQ

10,000

Transport Package

20-25kg/Carton+900kg Pallet

Specification

1/4"-7/8"

Trademark

BNT

Origin

China

HS Code

731815

Production Capacity

1000ton/Month

Key features

Custom Logo and Design: We accept custom logos and designs on products and packaging based on customer specifications.

Free Sample Availability: Free samples are provided for standard fasteners, with express charges covered for existing customers.

Flexible Lead Time: Delivery takes 10-15 days in slack season and 15-30 days in busy season for customized items.

Wide Material Options: Available in Stainless Steel (SS304/316) and Carbon Steel with various finishes like HDG and Zinc Plated.

Professional Manufacturer: Over 10 years of experience with rigorous quality assurance and competitive factory pricing.

Multiple Payment Terms: Accepts T/T, L/C, D/P, PayPal, and Western Union for flexible transaction options.

Standard Compliance: Products meet ASTM F436, DIN, JIS, EN, ISO, and GB standards for structural applications.

Factory Visit Welcome: Customers are welcome to visit the factory anytime to inspect production and quality processes.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceFast Delivery

Bolnut Fastener Co., Ltd

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 YearsNearest Port: SHANGHAI , NINGBO ,ZHAPU , SHENZHEN, TIANJINGAverage Response Time: ≤0.81h

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company in Zhangjiagang, Suzhou, with business scopes covering labor protection products, apparel, textiles, communication equipment, electronics, and certain medical protective products. It is described as a professional technical supplier and offers multiple customization modes, ODM services, and OEM services for popular brands. However, it has only one R&D engineer, launched no new products in the past year, and does not provide 3D software or SDK services. Service procedures and complaint-handling procedures exist, but supplier approval records are incomplete. Financial information is represented only by reporting years, without performance values. No overseas warehouse, showroom, overseas branch or offline trade-show participation is reported.

Supplier typeThe supplier is explicitly classified as a trade company, while its stated scope includes labor protection products, apparel, textiles, medical protective equipment, communication equipment, and electronic products. It is also identified as a professional technical supplier, indicating a trading-oriented business with technical and customization support rather than confirmed manufacturing status.

After-Sales capabilityThe supplier has a clear complaint-handling procedure with followed records, and it has a corrective and preventive action mechanism with implementation records. However, its general service-assessment procedure has no records, and its approved-supplier list lacks approval signatures or dates, indicating documented but incompletely controlled service processes.

R&D capabilityThe supplier is identified as a professional technical supplier and offers ODM services, but it has only one R&D engineer, launched no new products in the past year, and lacks both 3D software design and SDK capabilities. This shows some technical development and design support, but limited demonstrated innovation output and digital R&D capability.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides ODM services, directly evidencing broad customization and design-manufacturing support.

Client casesA repeat-buyer preference of 50%–80% is reported, and the supplier states that it provides OEM services for popular brands. These are positive customer-related indicators, but no named customers, specific projects, order examples, or independently verifiable case details are provided.

Product Q&A

Q:Can I get free samples?

Yes, we provide free samples for standard fasteners. We only ship weights under 1 kg. For existing customers, we also cover the express charges.

Q:What is the delivery time?

Stock items can be delivered within 2-5 days. For 1-2 containers, it takes 18-25 days. Custom orders take 10-15 days in slack season and 15-30 days in busy season.

Q:What are the payment terms?

Standard terms are 30% T/T deposit and 70% before shipping. We also accept L/C, D/P, PayPal, and Western Union.

Q:Do you accept custom designs or logos?

Yes, we accept customized designs for both products and packaging. Our professional design team can create products based on your specifications.

Q:What is the MOQ?

The minimum order quantity is 0.4 Ton.