What is the difference between A2 and A4 stainless steel bolts?

A2 (304) is ideal for standard outdoor and industrial use, while A4 (316) contains molybdenum, offering higher corrosion resistance for marine, chemical, and salt-spray environments.

Will stainless steel bolts rust over time?

Under severe chemical or chloride exposure, A2 may develop slight surface corrosion. A4/316 performs better in harsh environments. We also offer passivation treatment for enhanced protection.

Factory Direct Wholesale M10 Stainless Steel Hammer Head T Shaped Bolt for Solar Mounting

Name: Factory Direct Wholesale M10 Stainless Steel Hammer Head T Shaped Bolt for Solar Mounting
Brand: Ningbo Mianxuan Import &Export Co., Ltd.
SKU: 2174370675

Zhejiang, ChinaNingbo Mianxuan Import &Export Co., Ltd.

US$0.10

5,000-9,999 Pieces

US$0.05

10,000-49,999 Pieces

US$0.01

50,000+ Pieces

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Material

Stainless Steel

Type

T Head

Model NO.

DIN

Connection

Common Bolt

Head Style

Square

Standard

DIN, GB, JIS, GOST, ISO

Grade

A2-70, A4-80

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Passivation

Quality

100% Tested

Price

Factory Price

Delivery

15-30 Days

Surface

Plain, Zinc Plated (Blue, White, Black, Yellow)

Package

Standard Package or Customer's Packing

Box

Customer's Brand Box/Plain Box

MOQ

Can Be Negotiated

Shipment

by Sea / Truck / Plane / Express

Exterior Finish

Passivation

Sample

Available

Customized

Available

Service

One-Stop Service

Online Sales

24 Hours Online

OEM/ODM

Available

Head

T Head

Transport Package

Bulk Packaging, Small Box(Glue Box, Color Box)

Specification

M8-M80

Trademark

Mianxuan, Customized

Origin

Ningbo Zhejiang

Production Capacity

30000tons/Year

Key features

Wide Material Range: Available in Carbon Steel, Stainless Steel, Brass, and more.

Multiple Standards: Complies with DIN, GB, JIS, GOST, ISO, ANSI/ASTM, BS, BSW.

Customizable Options: Supports custom sizes, surface finishes, and packaging.

Quality Assurance: 100% tested for torque, hardness, and corrosion resistance.

Free Samples: Free or low-cost samples available for quality confirmation.

OEM/ODM Service: Custom production based on drawings, samples, or specs.

Fast Delivery: Lead time of 15-30 days for standard orders.

Global Shipping: Shipment via Sea, Truck, Plane, or Express services.

Company profile

High Repeat Buyers ChoiceYears of Export ExperienceR&D CapabilitiesODM Services

Ningbo Mianxuan Import &Export Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2014-07-01Nearest Port: Ningbo, Zhapu, ShanghaiAverage Response Time: ≤3.39hTerms of Payment: LC, T/T, Western UnionInternational Commercial Terms(Incoterms): FOB, EXW, CFR, CIF

AI-Powered supplier vetting

SummaryNingbo Mianxuan Import & Export Co., Ltd. is identified as a China-based manufacturer/factory in Zhejiang, offering vehicle parts, CNC machining parts, metal stamping, castings, fasteners, and related products. It reports TS 16949 and ISO 9001 certifications, more than 10 production lines, 6–10 quality-control staff, and shipment inspection reports with material certificates. The supplier provides 3D software design, ODM, and several customization options, but reports no new products in the past year, no SDK, and no OEM service for popular brands. Service infrastructure is limited: no in-stock capability, overseas warehouse, or overseas showroom, while service assessment, complaint handling, and corrective-action procedures lack written records. Financial information is limited to year labels without substantive performance values. No customer cases are provided.

Supplier typeThe supplier is explicitly classified as a Manufacturer/Factory and a limited company based in Ningbo, Zhejiang, China. Its stated product scope covers vehicle parts, CNC machining parts, metal stamping, castings, fasteners, plastic parts, and rubber parts, supporting classification as a diversified manufacturing supplier.

CertificationsThe supplier reports holding TS 16949 and ISO 9001 management-system certifications. It also states that each shipment will include an inspection report with a corresponding material certificate, indicating documented quality-related deliverables.

After-Sales capabilityThe supplier reports no in-stock service capability, overseas warehouse, or overseas showroom. It also has no written procedures or records for service assessment, complaint handling, or corrective and preventive actions, while contract status for manufacturing capacity is unknown.

Production capacityThe supplier operates more than 10 production lines, has 6–10 quality-control staff, and offers a broad metal, machining, casting, plastic, rubber, and vehicle-parts scope. It lists Ningbo and Shanghai ports, 21 qualified suppliers for service capability, and a one-month off-season lead time; peak-season lead-time data is inconsistently stated, limiting a complete capacity assessment.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, and minor customization, in addition to ODM services. These options directly support customized product development, although no evidence is provided for SDK-based development or OEM service for popular brands.

Product Q&A

Q:What thread standards do you follow?

Our screws comply with DIN, ISO, ANSI, and JIS standards, and can also be customized according to customer drawings.

Q:What stainless steel grades do you supply for bolts?

We supply multiple grades including A2-70, A2-80, A4-70, A4-80, 304, 316, and 410SS, suitable for different mechanical strength and corrosion-resistance requirements.

Q:Do you provide samples before mass production?

Yes, we offer free or low-cost samples for quality and dimension confirmation prior to order.

Q:How do you control product quality?

Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards.

Q:Do you offer OEM or customized production?

Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling.