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.

Heavy Duty Expansion Plug Anchor Plastic PA Nylon Drywall Wall Plug with Screw

Name: Heavy Duty Expansion Plug Anchor Plastic PA Nylon Drywall Wall Plug with Screw
Brand: Ningbo Mianxuan Import &Export Co., Ltd.
SKU: 2257828585

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

US$0.01-0.10

300 kg

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Standard

DIN, ANSI, GB, JIS, BSW, ISO

Material

Nylon

Model NO.

MXF4051

Surface Treatment

Without Treatment

Head Type

Countersunk Head

Thread

Unc, Unf, Un, Metric Coarse, Fine

Surface

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

Quality

100% Tested

Price

Factory Price

Lead Time

15-30 Days

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

Cuotomized

Sample

Available

Customized

Available

Service

One-Stop Service

Online Sales

24 Hours Online

OEM/ODM

Available

Transport Package

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

Specification

M6 - M32

Trademark

Mianxuan, Customized

Origin

Ningbo, China

HS Code

7318151001

Production Capacity

100tons/Month

Key features

Wide Standard Compliance: Meets DIN, ANSI, GB, JIS, BSW, and ISO standards for global compatibility.

Customizable Thread Options: Available in UNC, UNF, Metric Coarse, Fine, and custom thread specifications.

Diverse Surface Finishes: Offers Plain, Zinc Plated, Yellow Zinc, HDG, and Dacromet finishes.

Custom Packaging Services: Supports customer brand boxes, plain boxes, and custom packing solutions.

OEM and ODM Availability: Full OEM/ODM services including custom production and labeling.

Sample Availability: Free or low-cost samples provided for quality and dimension confirmation.

Comprehensive Quality Testing: 100% tested for torque, hardness, thread precision, and salt spray resistance.

Flexible Lead Time: Standard 15-30 days, with peak season up to one month and off-season within 15 workdays.

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: ≤3.25hTerms 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.