What tools for nut installation and removal?

Use wrenches, sockets, impact wrenches. Torque wrenches for precise torque.

Are there special nuts for specific uses?

Yes. Wing nuts for easy hand - tightening; flange nuts for high - vibration; hex socket nuts for compact fastening.

High Strength Stainless Steel DIN557 Square Nut for

Name: High Strength Stainless Steel DIN557 Square Nut for
Brand: NINGBO YINZHOU GONUO HARDWARE CO., LTD.
SKU: 2220894495

Zhejiang, ChinaNINGBO YINZHOU GONUO HARDWARE CO., LTD.

US$0.01

1,000-4,999 Pieces

US$0.005

5,000+ Pieces

Sample price:US$5.00/piece.Request sample

Product profile

Customization

Available

Material

Stainless Steel

Type

Square Head

Model NO.

Square nut

Connection

Common Bolt

Head Style

Square

Standard

DIN, ANSI

Grade

A2-70, A4-70,A2-80,A4-80

Application

Machinery,Chemical Industry,Environmental,Building

Thread Type

Internal Thread

Surface Treatment

Plain

Precision Grade

Industrial Grade

Transport Package

Carton, Pallet

Specification

M1-M160, 1/4" to 1-1/2"

Trademark

GONUO

Origin

China

HS Code

7318160000

Production Capacity

25000/Month

Key features

High Strength Grades: Available in A2-70, A4-70, A2-80, and A4-80 grades for superior load capacity.

Corrosion Resistance: Stainless steel options (SS304/SS316) offer excellent resistance to rust and chemicals.

DIN & ANSI Standards: Complies with DIN and ANSI standards for global compatibility and precision.

Versatile Applications: Suitable for machinery, chemical industry, environmental projects, and building.

Customization Options: Customizable thread type, surface treatment, and precision grade for specific needs.

Company profile

Importers and ExportersYears of Export ExperienceExperienced TeamExhibition Experience

NINGBO YINZHOU GONUO HARDWARE CO., LTD.

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2011-10-08Nearest Port: Ningbo ShanghaiAverage Response Time: ≤0.75hTerms of Payment: LC, T/T, PayPalInternational Commercial Terms(Incoterms): FOB, CFR, CIF, DDP

AI-Powered supplier vetting

SummaryNingbo Yinzhou Gonuo Hardware Co., Ltd. is identified as a specialized manufacturer of nuts, serving industrial equipment, tools and hardware, automotive parts, and machinery sectors. It demonstrates broad customization capability, including sample-, drawing-, minor-, flexible-, and full-customization services, supported by engineering assistance and new product activity in the past year. The supplier reports ISO9001:2015 certification, documented service procedures, corrective/preventive-action processes, and complaint-handling procedures. Production information indicates nut output of 1,000 tons, while quality inspection staffing appears limited and finished products are checked by packing staff. The supplier exports to multiple regions and is located near Ningbo and Shanghai ports. It lacks SDK, ODM, in-stock, overseas warehouse, and overseas showroom capabilities; fire drills were not conducted regularly during the past year. Financial information is limited to year references, so credibility cannot...

Supplier typeThe supplier is explicitly described as a specialized manufacturer dedicated to researching, producing, and selling nuts. Its stated trade coverage includes industrial equipment, tools and hardware, automotive parts, and manufacturing machinery, confirming a manufacturing-oriented industrial supplier profile.

CertificationsThe supplier reports an ISO9001:2015 certificate, providing explicit evidence of a quality management system certification. No additional certifications are identified in the provided information.

After-Sales capabilityThe supplier reports written procedures and followed records for service capability assessment, corrective and preventive actions, and customer complaint handling. This supports the existence of structured after-sales and issue-resolution processes, although actual service performance outcomes are not provided.

R&D capabilityThe supplier reports new products during the past year, has 41–50 years of total R&D engineer experience, and provides engineering support from drawing review through process design and sample validation. However, it reports no available SDK and no ODM service, so the evidence supports product-development capability but not a full collaborative development platform.

Production capacityThe supplier reports nut production of 1,000 tons and serves multiple export markets, with peak-season lead time of one month and off-season lead time within 15 workdays. However, it reports no in-stock capacity, no overseas warehouse, and finished-product checking by packing staff; outsourcing procedures and contracts are also of unknown status.

Customization capabilityCustomization is explicitly offered from samples, designs, minor requirements, flexible requirements, and full specifications. The engineering team supports drawing review, process design, and sample validation for non-standard nuts involving thread type, dimensions, mechanical properties, and surface treatment.

Product Q&A

Q:What materials are nuts made of? How does material affect selection?

Common materials are carbon steel, stainless steel, brass, and nylon. Carbon steel offers strength but rusts; stainless steel resists corrosion; brass is non-magnetic and anti-corrosive; nylon prevents loosening and vibration.

Q:What's the difference between a nut and a bolt?

Nuts have internal threads and pair with externally threaded bolts. Bolts pass through parts, and nuts secure them.

Q:How to prevent nuts from loosening?

Use lock nuts, apply thread - locking compounds, or add mechanical lock devices like spring washers.

Q:How to prevent nuts from corroding?

Pick corrosion - resistant materials (stainless steel, galvanized steel), apply anti - corrosion coatings, and maintain regularly.

Q:How to choose nut size and specification?

Match nuts to bolts. Consider bolt thread diameter, pitch, load, and space. Refer to standards or experts.