What standards do the couplings meet?

Class T and Class SM couplings are manufactured according to API Specification 11B.

What material are the Grade T couplings made of?

Grade T couplings are made of AISI 5140 alloy steel, which is very resistant to hydrogen embrittlement.

When should sucker rod couplings be replaced?

We recommend changing couplings after three make-ups, provided the connection threads have been inspected and deemed acceptable for reuse.

Sucker Rod API Spec 11b with C, D, H and K Grades Polished Rod

Name: Sucker Rod API Spec 11b with C, D, H and K Grades Polished Rod
Brand: Shandong Light Fir Machinery Equipment Co., Ltd.
SKU: 2063509425

Shandong, ChinaShandong Light Fir Machinery Equipment Co., Ltd.

US$2.00-10.00

1 Piece

Sample price:US$5.00/joint.Request sample

Product profile

Customization

Available

After-sales Service

7X24

Warranty

12months

Manufacturing Process

Forging

Surface Treatment

Polishing

Operation Pressure

Material

Alloy

Delivey

10days

Transport Package

Stand Export Package

Specification

5/8", 3/4", 7/8", 1", 1-1/8"

Trademark

LFM

Origin

China

Production Capacity

100000

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 at the thread root.

Hydrogen Embrittlement Resistance: Grade T and SM couplings made of 5140 alloy steel, highly resistant to hydrogen embrittlement.

Advanced Thermal Spraying: Ni alloy coating reduces friction coefficient to 0.01, improving rod and pipe service life.

Customizable Surface Treatment: Options include phosphate chemical treatment or black oxide based on customer request.

Multiple Coupling Types: Available in full size, slim hole, over size, and combination sub-couplings for various diameters.

Enhanced Wear Resistance: Specification hardening process and spray metal coating ensure increased wear and corrosion resistance.

7x24 After-Sales Support: Comprehensive after-sales service available around the clock with a 12-month warranty.

Company profile

Shandong Light Fir Machinery Equipment Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2021-08-17Nearest Port: Tianjin, Shanghai, QingdaoAverage Response Time: ≤5.58hTerms of Payment: LC, T/TInternational Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DAT, DAP, CIP, CPT, Others, FCA

AI-Powered supplier vetting

SummaryShandong Light Fir Machinery Equipment Co., Ltd. is a limited company based in Dongying City, Shandong, China. It functions as both a trading company and a manufacturer, specializing in a variety of machinery equipment. The company holds ISO 9001 certification but lacks documented after-sales service procedures. Financial data indicates consistent capacity over the past three years, while the company demonstrates OEM capabilities for well-known brands despite limited R&D innovation. Production is supported by two lines and a small team of R&D and quality control staff.

Supplier typeThe supplier is a limited company functioning as both a trading company and a manufacturer located in Shandong, China.

CertificationsThe supplier holds ISO 9001 certification, indicating a commitment to quality management standards.

After-Sales capabilityThe supplier lacks documented procedures or records for handling after-sales services, indicating weak service capability.

R&D capabilityThe supplier lacks significant innovation capability, evidenced by no new products in the past year and limited R&D staff.

Customization capabilityThe supplier offers customization from samples and designs, and provides OEM services for known brands but does not offer ODM services.