What sizes are available?

Couplings are available in sizes ranging from 16mm to 38mm, including full size, slim hole, and over size options.

What are the payment terms?

We accept LC, T/T, PayPal, and Western Union as valid payment methods for orders.

What is the warranty period?

The product comes with a 12-month warranty and includes online after-sales service support.

Sucker Rod Coupling Polished Rod Coupling 11b Class T and Class Sm

Name: Sucker Rod Coupling Polished Rod Coupling 11b Class T and Class Sm
Brand: Dongying Kenli Jinxiu Petroleum Machinery Co., Ltd
SKU: 1968416672

Shandong, ChinaDongying Kenli Jinxiu Petroleum Machinery Co., Ltd

US$1.50-3.00

10 Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Online Service

Warranty

12 Month

Model NO.

T class SM class

Manufacturing Process

Forging

Surface Treatment

Polishing

Operation Pressure

Not Applicable

Material

Alloy

Machine Type

Oil and Gas Industry, Sucker Rod

Processing Type

Forging

Use

Oil Production, Oil and Gas

Size

16- 38mm

Common Material

AISI 4130 4140 4330

Length

API Standard Length or Customization

Transport Package

Bundles and Woorden Package

Specification

5/8" ~ 1-1/2"

Trademark

JX PETRO

Origin

Dongying

HS Code

8431431000

Production Capacity

8000 Pieces Per Month

Key features

API 11B Compliant Manufacturing: Class T and SM couplings manufactured strictly per API Specification 11B standards.

Cold Form Rolled Threads: Thread rolling creates compressive stress for maximum strength, avoiding material removal.

Customizable Size and Material: Sizes range 16-38mm; materials include AISI 4130/4140/4330 and AISI 5140.

Multiple Surface Treatments: Options include phosphate chemical treatment, black oxide, or spray metal coating.

OEM and ODM Services: Full OEM/ODM support available with 3 R&D engineers and advanced production machines.

12-Month Warranty Coverage: Comprehensive 12-month warranty with online after-sales service support.

Flexible Payment Terms: Accepts LC, T/T, PayPal, and Western Union for convenient international transactions.

Fast Lead Time: Standard one-month lead time for both peak and off-season production periods.

Company profile

Dongying Kenli Jinxiu Petroleum Machinery Co., Ltd

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2022-09-05 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.31h CertifiedTerms of Payment: LC, T/T, PayPal, etc.

AI-Powered supplier vetting

SummaryJX PETRO is a China-based factory and limited company founded in 2005, specializing in petroleum drilling and production equipment. The supplier reports API certification, ISO9001, ISO14001, and ISO45001 certifications, six production lines, professional processing and testing equipment, and a manufacturing facility of 11,000–18,000 square meters as reported in different slices. Its product range covers sucker rods, mud pumps, well control and wellhead equipment, downhole tools, handling tools, and rig accessories. The supplier has self-operated import and export rights, but exports reportedly account for only 1%–10% of sales and its primary market is domestic. Evidence supports manufacturing capability, certification, and some R&D activity, including six national patents. No sufficient evidence is provided regarding after-sales service systems, customization capability, or specific customer cases. Financial assessment is limited because financial figures are excluded.

Supplier typeThe supplier is explicitly identified as a factory and as a limited company engaged in manufacturing and supplying petroleum drilling and production equipment. Its stated establishment year is 2005, and its operations are located in Shandong, China.

CertificationsThe supplier states that it holds API certification and ISO9001:2015, ISO14001:2015, and ISO45001:2016 certifications covering quality, environmental, and occupational health and safety management. These certifications provide explicit evidence of formal management-system and product-certification coverage.

R&D capabilityThe supplier reports investment in production technology R&D and talent development, 15 professional and technical personnel, three years of R&D engineer experience, and six national patents. These statements explicitly support the existence of R&D and patent activity, although the scope and commercial impact of the innovations are not detailed.

Production capacityProduction capability is supported by six production lines, 26 large-scale processing machines, more than 20 testing devices, and a reported manufacturing area of 11,000 square meters in one slice and 18,000 square meters in another. The supplier also reports 50 production workers in its company description, while another slice lists 35 total employees, indicating inconsistent workforce data that should be verified.