What material are the couplings made of?

Grade T couplings are made of AISI 5140 alloy steel. Grade SM couplings also use 5140 alloy steel with a specialized spray metal coating.

Are custom surface treatments available?

Yes, the coupling can be coated using phosphate chemical treatment or black oxide on customer's request.

What is the warranty period?

We provide a 12-month warranty for our products.

API 11b Full Size Slim Hole 7/8 Sm Sucker Rod Coupling

Name: API 11b Full Size Slim Hole 7/8 Sm Sucker Rod Coupling
Brand: Shandong Light Fir Machinery Equipment Co., Ltd.
SKU: 2063583325

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 according to API Specification 11B standards.

Cold Form Rolled Threads: Thread rolling creates compressive stress at the root, providing maximum strength compared to cut threads.

Hydrogen Embrittlement Resistance: Made from AISI 5140 alloy steel, offering high resistance to hydrogen embrittlement for durability.

Advanced Thermal Spraying: Class SM couplings use Ni alloy spray metal to reduce friction coefficient to 0.01, extending service life.

Customizable Surface Treatment: Surface options include phosphate chemical treatment or black oxide coating based on customer requirements.

Multiple Size Options: Available in full size, slim hole, and over size configurations, including combination sub-couplings.

24/7 After-Sales Support: Comprehensive after-sales service available 7x24 hours to assist with technical inquiries and issues.

12-Month Warranty Coverage: All products come with a standard 12-month warranty to ensure quality and customer confidence.

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: ≤8.10hTerms 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 China-based limited company described as both a trading company and manufacturer/factory, offering oilfield and drilling-related equipment. It holds an ISO 9001 management-system certification and reports a valid import/export license. The supplier provides customization from samples and designs and has provided OEM services for well-known brands, but reports no ODM service and no new products in the past year. Production is supported by two production lines, while reported R&D-engineer and quality-control staffing are each below five. Service infrastructure is limited: there are no overseas warehouses, showrooms, agents, branches, or offline trade-show participation. Written procedures or records for service assessment, corrective/preventive action, and complaint handling were not provided. Financial records are identified by year, but no performance values are supplied, so financial credibility cannot be assessed.

CertificationsThe supplier reports holding ISO 9001 certification. This is explicit evidence of a quality-management-system certification, although no additional certification details are provided.

After-Sales capabilityThe supplier has no written procedures or records for service-capability assessment, corrective and preventive actions, or effective complaint handling. It also reports no overseas warehouse, showroom, agent, branch, or offline trade-show experience, although it lists 15 qualified service-capability suppliers and offers a one-month average lead time.

R&D capabilityThe supplier reports no available SDK, no new products during the past year, and no ODM service. Its R&D engineer experience is below five years, which provides no evidence of strong innovation performance; however, it does provide customization from samples and designs.

Production capacityThe supplier identifies itself as a manufacturer/factory, operates two production lines, and offers a broad range of artificial-lift, wellhead, well-control, valve, cementing, drilling, and solid-control equipment. Quality-control staffing is below five, so production scope is documented but operational scale and capacity remain limited or unverified.

Customization capabilityThe supplier explicitly provides customization from samples and from customer designs, and lists customized products among its main offerings. It also reports OEM service for well-known brands, while not offering ODM service.