API 5B BCSG Thread Plug and Ring Gages: A Complete Guide

BCSG stands for Buttress Casing thread gage. It is a specialized thread gage used to inspect the buttress (or partial trapezoidal) threads on oil well casing pipes and couplings. Buttress casing threads, commonly designated as BTC or BCSG, are one of the two major casing thread forms specified by the American Petroleum Institute (API), alongside round threads (CSG). Their unique thread profile—featuring a 3° load‑bearing flank and a 10° trailing flank—is specially engineered to carry heavy axial loads while maintaining efficient stabbing and make‑up performance, making them essential for deep‑well, high‑pressure drilling operations.

You can get genuine mitutoyo from SOWANT, Buying Mitutoyo from China

Buying Mitutoyo from China,Buying Mitutoyo from SOWANT, all mitutoyo producets are made in Japan.

Ниже представлена техническая статья на русском языке, посвященная возможностям компании Sowant Precision Gage Co., Ltd. в области изготовления нестандартных калибров для резьб.

В современном машиностроении, авиастроении и нефтегазовой отрасли контроль геометрии резьбовых соединений является критическим фактором, влияющим на надежность и герметичность конструкций. Компания Sowant Precision Gage Co., Ltd. специализируется на разработке и изготовлении резьбовых калибров (пробок и колец) по индивидуальным заказам, предлагая решения для самых сложных и нестандартных задач.

Thread Gauge Calibration,thread ring metrology ,thread gages scanner

Do you know how to check the size of thread gages,pitch diameter,major diameter,minor diameter, angle,lead? use the thread gages scanner or length machine with ball tips? Please tell us your ways.

5.0000"-4 H BPV LH thread ring gauges with high quality made in China

5.0000"-4 H BPV LH thread ring gauges with high quality made in China.
4"- 4 TPI HBPV LH Go/ No Go Thread Plug Gauges
SWTG , Leading Solutions, Professional in Gaging Solutions, Complete line of ANSI/ASME/ISO Thread Gauges Stock Availiable. All the Gages come with the Long Form Calibration Certificates traceable to NIM

SWTG Thread Gauge,the best thread gauges'manufacture in China

SWTG, an abbreviation for Sowant Gage, is the premier brand of precision thread gages manufactured by Sowant Precision Gage Co., Ltd. Renowned for uncompromising quality and exceptional accuracy, every SWTG thread gage is engineered to meet the most stringent international standards, providing reliability and trust in critical measurement applications.

CNC Thread Grinding Machine+Thread scanner=Best quality thread gauges

Sowant Precision Gage stands as a distinguished leader in the manufacturing of high-precision thread gauges, serving critical sectors such as oil and gas, hydraulics, and heavy machinery. Our specialization encompasses the entire production process of API petroleum gauges, ACME thread gauges, and High-Pressure (HBPV) thread gauges, ensuring every product meets the most stringent international standards.

13 3/8 BCSG Thread gauge and 11 3/4 BCSG thread ring gauges

China made API 5B 13 3/8 BCSG Thread gauge and 11 3/4 BCSG thread ring gauges , The form angle of API thread gauge:3°, 10°, The material is CR15, HRC 55-62. Delivery time: 2 week, with API Calibration Reports(standoff value S1). 7 5/8 BTC / BCSG API thread gauge-Buttress Thread Casing ring plug gage.

Thread Inspection Systems from Johnson Gage. Johnson Gage Thread Inspection Systems consistently meet and exceed today’s requirements.

Johnson Gage is a Connecticut-based screw thread gage manufacturer established in 1920 by Charles G. Johnson and his three sons. The company’s products are external bench-style gages, portable-style gages, tapered thread gages, etc. Its latest products launched to the market are the ThreadSpec3 software and “centrax” runout and concentricity inspection systems. Now, the company has 90 US patents for its screw thread devices. It also has customers from Fortune 500 companies, start-up manufacturers, aerospace, defense, and mechanical assembly. For services, it provides gage calibration, inspection, engineering, and consulting services.

This China made solid thread ring guages made per ISO standard with 6g tolerance in stock

Sowant have a large stock of thread ring gauges in ISO standard with 6g tolerance , thread ring guage stock list, Inventory table of thread ring gauge,stock form of thread ring gaug ，Warehouse Inventory Management Sheet of thread ring guage.Inventory list of thread ring guages.