We have most sizes in stock. For orders under 5,000 pcs, the lead time is 5-7 days.

Can we customize the production?

Yes,we can make mold to produce,you only send us your request with detailed drawings or photos, then we will make the quotation for you accordingly.

Can I get a better price for bulk orders?

Definitely. Our prices are negotiable. The more you order, the more discount you will get. Please contact us for a tailored offer.

Are your products certified? Can I get the certification files?

All our products comply with industry standards and hold valid certificates. Please send us a message, and we will provide you with the relevant certification documents promptly.

Can you offer detailed dimension drawings and specifications?

We have complete size data for all items. Feel free to contact us to receive the detailed product dimensions.

What is your minimum order quantity(MOQ)?

We support flexible MOQ. Most standard products accept small orders. Please contact us to confirm the exact MOQ of the items you need.

How soon can I receive your quotation after inquiry?

We normally send you the official quotation within 24 working hours once we get your detailed requirements.

Can I mix different items in one order?

Yes, mixed orders of different sizes and models are available. Kindly send us your product list for arrangement.

What shipping options are available?

We offer sea freight, air freight and international express. We will recommend suitable shipping way based on your order quantity and delivery schedule.

How to handle defective products after receiving goods?

Please provide photos or videos of defective goods to us. We will work out a proper solution like replacement or compensation after verification.

Countersunk Screws with Fastener Double-Ended Stud Bolt Certification

Name: Countersunk Screws with Fastener Double-Ended Stud Bolt Certification
Brand: Qewitco Fasteners Co., Ltd
SKU: 2233846485

Shandong, ChinaQewitco Fasteners Co., Ltd

US$0.01-0.30

1,000 Pieces

Sample price:US$20.00/piece.Request sample

Product profile

Customization

Available

Material

Stainless Steel

Type

Hexagon Head

Model NO.

Double-Ended Stud Bolt

Groove

Torx

Connection

Common Bolt

Head Style

Round

Standard

DIN, GB, ANSI, BSW, JIS, ISO

Grade

8.8,10.9,12.9,Carbon Steel A2-50,A2-70,A4-50,A4-7

Delivery

20-30 Days

Packag Color

Customizable

Thread Standard

Unc/Unf/Unef/Uns/Bsw/Bsf/Metric Coarse/Metric Fine

Custom Order

Customization by Drawing/Sample

ODM/OEM

Available

Service

Custom-Made Service

Material Test Certificate

Have

Sample

Samples in Stock Are Free with Freight Collect

Price Terms

Fob/CFR/CIF/DDP/DAP

Color

Customizable or Sliver

Quality Control

100% Quality Inspection

Application2

Connection, Fastening

Finish

Phosphate, Zinc Plated(De-Embrittlement)

Transport Package

Bulk Pack Small Boxed

Specification

Customized

Trademark

Qewitco

Origin

China

HS Code

731816

Production Capacity

10000ton/Year

Key features

High-Quality Structural Steel: Made of premium carbon steel or alloy steel base material with dense metal structure for stable and reliable overall strength.

Precision Rolled Threads: Formed by thread rolling process with full and accurate thread profile and high surface finish for smooth engagement without jamming.

Multiple Material Options: Available in carbon steel, stainless steel, alloy steel and other materials to adapt to different strength grades and working condition requirements.

Various Surface Finishes: Available in electro-galvanizing, hot-dip galvanizing, black oxide, dacromet, nickel plating and other surface treatment options.

International Standards Compliance: Manufactured in strict compliance with DIN, ISO, GB, ASTM, ANSI, JIS and other major international standards.

High Tensile Load Capacity: Strengthened by quenching and tempering heat treatment with excellent tensile and shear performance, suitable for heavy-load and high-stress fastening scenarios.

Stable Fastening Connection: High thread fitting precision with uniform force distribution, tight connection resistant to loosening for safe and reliable long-term use.

Uniform Dimensional Accuracy: Strict control of outer diameter, pitch and tolerance range with good consistency of same-specification products and strong general interchangeability.

Excellent Corrosion Resistance: Uniform and dense surface treatment layer with strong rust and weather resistance, adaptable to humid, outdoor and other complex environments.

Wide Industrial Applications: Suitable for mechanical equipment, steel structures, pipeline flanges, power and petrochemical, bridge construction and other industrial fields.

Company profile

Years of Export ExperienceExperienced TeamSelf-brandedHigh Repeat Buyers Choice

Qewitco Fasteners Co., Ltd

Shandong, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2003-12-05Average Response Time: ≤1.19hTerms of Payment: T/T

AI-Powered supplier vetting

SummaryThe supplier demonstrates established export experience, with 90% of sales from exports and 22 years of exporting. It has ISO9001:2015 certification, raw-material traceability, quality assurance, and 100% finished-product inspection, although inspection is performed by packing staff and only two quality inspectors are reported. Customization is broad, covering samples, designs, full customization, minor customization, and flexible customization. Service strengths include in-stock capability, stated lead times within 15 workdays in both peak and off-season, and multiple payment and quotation terms. Limitations include no overseas warehouse, showroom, agent, branch, or overseas service-country coverage, no Fortune 500 cooperation, no new products launched in the last year, one R&D engineer, no popular-brand OEM, and an undocumented corrective/preventive-action process. Financial credibility cannot be assessed because the provided financial figures are excluded from evaluation.

Supplier typeThe supplier is strongly export-oriented, reporting 90% export sales and 22 years of export experience. It can provide in-stock service and accepts FOB, CIF, CFR, and EXW terms, but reports no overseas warehouse, showroom, agent, branch, or overseas service-country coverage.

CertificationsThe supplier reports an ISO9001:2015 certificate for both sustainable development management and management systems, plus other product compliance or sustainability certifications. The specific additional certifications are not identified, so the evidence supports ISO9001 holding but not broader certification strength.

R&D capabilityThe supplier reports one R&D engineer and no new products launched during the previous year. It also reports no available SDK and no popular-brand OEM capability, which indicates limited documented innovation evidence.

Production capacityProduction-related evidence includes raw-material traceability, 100% finished-product inspection, quality assurance, four own-brand quality-control capabilities, inventory capacity, and lead times within 15 workdays in both peak and off-season. Only two quality inspectors are reported, and finished products are checked by packing staff, so production capability is positive but quality-control depth is limited.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad customization capability.