How long does production take?

Lead time is within 15 working days for both peak and off-peak seasons.

What payment methods do you accept?

We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payments.

Where are the products manufactured?

The products originate from Tianjin, China.

Internal and External Serrated Locking Washers

Name: Internal and External Serrated Locking Washers
Brand: OPPU (Tianjin) Industrial Parts Co., Ltd.
SKU: 2297047735

Tianjin, ChinaOPPU (Tianjin) Industrial Parts Co., Ltd.

US$0.03

10,000-49,999 Pieces

US$0.01

50,000-999,999 Pieces

US$0.005

1,000,000+ Pieces

Product specifications

M

Product profile

Customization

Available

Material

Carbon Steel

Type

Hexagon Head

Model NO.

Internal Locking Washers

Connection

Common Bolt

Head Style

Round

Standard

DIN, ANSI, GB, JIS, BSW, GOST

Grade

8.8

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Hot Galvanizing

Specification

M3, M4, M6, M8-M20

Trademark

oppu

Origin

Tianjin

HS Code

7415290000

Production Capacity

5000ton/Year

Key features

DIN 6797 Standard Compliance: Manufactured strictly according to DIN 6797 standard for internal tooth lock washers.

Zinc Plated Finish: Features zinc pleated surface treatment for enhanced corrosion resistance.

Wide Size Range: Available in sizes from M2 to M30 to fit various bolt specifications.

Carbon Steel Material: Constructed from high-quality carbon steel for durability and strength.

OEM and ODM Services: Custom manufacturing services available for specific brand and design requirements.

Heavy Industry Application: Designed specifically for demanding applications in heavy and retail industries.

Fast Lead Time: Peak and off-peak season lead times are both within 15 working days.

Flexible Payment Terms: Accepts LC, T/T, D/P, PayPal, Western Union, and small-amount payments.

Company profile

Cooperated with Fortune 500Self-brandedFast DeliveryQuality Assurance

OPPU (Tianjin) Industrial Parts Co., Ltd.

Tianjin, China

CertifiedBusiness Type: Manufacturer/Factory & Trading CompanyExport Year: 2025-06-01Nearest Port: tianjinAverage Response Time: ≤0.38hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CIF

About Our Factory & Business Background

AddressTianjin Xiqing Automobile Industrial Zone (Zhangjiawo Industrial Zone), No. 11 Taijin Road, Zone 1, Tianjin, China

Plant Area2834 square meters

Number of Employees34

Registered Capital10,000,000 RMB

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity1000 pcs

Supply Chain Partners200

Our Production Capability & Technical Expertise

Main ProductsHardware Fastener, Bolts, Nuts, Screws, Washer, Industrial Parts, Pins, Studs

Our Industry Experience & Global Business Record

Year of Establishment2012-08-06

Main MarketsAfrica, Domestic

Repeat Buyers Choice80%~100%

Number of Foreign Trading Staff3

Overseas Agent/BranchNo

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015, ISO45001:2018, ISO14001, Others

Cooperated with Fortune 500Yes

Product Q&A

Q:What is the material of the washers?

The washers are made of carbon steel with a zinc pleated finish.

Q:What standards do these washers meet?

They comply with the DIN 6797 standard for internal and external serrated locking washers.

Q:What size range is available?

Sizes range from M2 to M30 to accommodate various bolt specifications.

Q:Do you offer customization services?

Yes, we provide OEM and ODM services to meet custom requirements.

Q:What is the minimum order quantity?

The minimum order quantity is 1 ton.

Send Inquiry

*To: