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3 1/2-4 STUB ACME-2G

3 1/2-4 STUB ACME-2G Thread Ring Gage, 3 1/2-4 SA-2G per ASME 1.8 made in China by Sowant Precision Gage
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3 1/2-4 STUB ACME-2G Thread Ring Gage, 3 1/2-4 SA-2G per ASME 1.8 made in China by Sowant Precision Gage

 

 ASME B1.8 Stub ACME Thread Gauges and Sowant Precision Gage Solutions

The ASME B1.8 standard governs the specifications for Stub ACME screw threads, a specialized thread form designed for applications requiring shallow thread depth and robust mechanical performance. Stub ACME threads are widely used in industries such as oil and gas, heavy machinery, and aerospace, where durability and precision are critical. This article explores the features of ASME B1.8-compliant thread gauges, highlights the advantages of Sowant Precision Gage’s 3 1/2-4 STUB ACME-2G thread ring gauges, and lists common specifications of Stub ACME thread gauges.

ASME B1.8 Stub ACME Thread Standard

Stub ACME threads, standardized under ASME B1.8, are a variant of the ACME thread profile but with reduced thread height (shallow depth). Key characteristics include:

  • 29° Thread Angle: Distinct from the 30° angle of standard ACME threads, Stub ACME threads prioritize strength and wear resistance.

  • Coarse Pitch: Typically featuring 4–6 threads per inch (TPI), Stub ACME threads are ideal for high-stress applications where rapid assembly or disassembly is required.

  • Applications: Commonly used in oilfield equipment (e.g., downhole tools), mechanical power transmission systems, and aerospace components due to their resistance to wear and galling38.

  • Compliance: ASME B1.8 specifies dimensional tolerances, thread form, and inspection methods, ensuring interchangeability and reliability in industrial use.

Sowant Precision Gage’s 3 1/2-4 STUB ACME-2G Thread Ring Gauge

Sowant Precision Gage offers high-quality 3 1/2-4 STUB ACME-2G thread ring gauges that adhere strictly to ASME B1.8 standards. Key advantages include:

  1. Short Lead Time: Efficient production processes enable rapid delivery, minimizing downtime for industrial clients.

  2. Cost-Effective Pricing: Competitive pricing without compromising precision or material quality.

  3. Standard Compliance: Guaranteed adherence to ASME B1.8 specifications, including 2G tolerance class (medium fit for general applications).

  4. High Wear Resistance: Manufactured from hardened tool steel (e.g., O1 or alloy steel), these gauges withstand repeated use in harsh environments.

  5. Versatility: Suitable for inspecting both internal and external Stub ACME threads in components like screw jacks, valve assemblies, and hydraulic systems.

20 Common Specifications of Stub ACME Thread Ring Gauges

Below is a list of standard Stub ACME thread ring gauge models compliant with ASME B1.8. These gauges are widely used across industries for quality control:

  1. 10-1/4"-6 STUB ACME-2G

  2. 12-1/2"-6 STUB ACME-3G

  3. 15-3/4"-4 STUB ACME-2G

  4. 2"-4 STUB ACME-2G

  5. 2-1/4"-6 STUB ACME-3G

  6. 2-1/2"-4 STUB ACME-2G

  7. 2-3/4"-6 STUB ACME-2G

  8. 3"-4 STUB ACME-3G

  9. 3-1/4"-6 STUB ACME-2G

  10. 3-1/2"-4 STUB ACME-2G (as offered by Sowant Precision Gage)

  11. 3-3/4"-6 STUB ACME-3G

  12. 4"-4 STUB ACME-2G

  13. 4-1/2"-6 STUB ACME-2G

  14. 5"-4 STUB ACME-3G

  15. 5-1/4"-6 STUB ACME-2G

  16. 5-1/2"-4 STUB ACME-2G

  17. 5-3/4"-6 STUB ACME-3G

  18. 6"-4 STUB ACME-2G

  19. 6-1/4"-6 STUB ACME-2G

  20. 6-5/16"-4 STUB ACME-3G

Note: The suffix "2G" or "3G" denotes tolerance classes per ASME B1.8, with "2G" being standard for general use and "3G" for tighter tolerances.

Why Choose Sowant Precision Gage?

Sowant Precision Gage stands out as a trusted supplier due to:

  • Customization: Ability to produce gauges for non-standard thread sizes or specialized applications.

  • Quality Assurance: Advanced manufacturing techniques ensure compliance with ASME, ISO, and API standards.

  • Comprehensive Support: Technical guidance for selecting the correct gauge specifications based on application requirements.

Conclusion

ASME B1.8 Stub ACME thread gauges are indispensable for maintaining precision in industrial systems requiring shallow, high-strength threads. Sowant Precision Gage excels in delivering reliable, cost-effective gauges like the 3 1/2-4 STUB ACME-2G, backed by rapid production and strict adherence to international standards. For industries seeking durable inspection tools, Sowant’s solutions ensure operational efficiency and long-term reliability.

References: ASME B1.8-1988(R2021), ANSI/ASME B1.8-1977, material and tolerance guidelines.