Screw Plug Gauges

We are an Exporter of Screw Plug Gauges in India, manufactured to class 6H as standard, and comprise a Go gauge member which checks the major and effective diameters are not undersized, while also ensuring the pitch meets specification. We offer Screw Plug Gauges at competitive rates, and besides standard designs, these can also be customized as per requirements. Screw Plug Gauges are manufactured using quality materials to ensure durability and efficient performance, and are widely used in inspection and quality control applications across industries, providing accurate results and consistent performance over time, with each piece tested to meet standards before dispatch and supplied with secure packaging for domestic and global clients ensuring safe transit and reliable long-term usage.

Technical Specification
Gauge Type	Screw Plug Gauge (Go / No-Go)
Material	Hardened Tool Steel
Hardness	58–62 HRC
Applicable Thread Forms	Metric or Unified
Standard	ISO Metric / ANSI / ASME (UNC/UNF)
Metric Sizes	M2 – M200
Unified Sizes	0 to 1"
Tolerance Class	6H (Metric) or 2B (Unified)
Application	Check internal thread conformance
Surface Finish	Precision ground / polished
Customization	Available as per requirement

Precision you can trust for consistent inspection results

Screw plug gauges are manufactured under controlled processes to ensure consistent thread accuracy, smooth gauging action, and repeatable inspection results, supporting reliable quality checks in high-volume and precision machining environments without variation between batches.
Each gauge undergoes strict dimensional inspection using calibrated measuring systems to confirm pitch accuracy, and diameter stability, ensuring dependable thread verification for both internal inspection and final quality approval stages.
Dedicated Impex uses high-grade steel selection and stable heat-treatment processes to achieve excellent hardness balance, strong wear resistance, and long service life, helping maintain accurate measurement performance even during repeated use in demanding shop-floor inspection conditions.
Screw plug gauges feature carefully controlled surface finishing to achieve smooth thread profiles, reduced friction, and accurate feel during gauging, minimizing operator error and improving consistency in go and no-go thread inspection procedures.
Quality control includes stage-wise inspection, process validation, and final verification to ensure each screw plug gauge meets defined tolerance limits and delivers dependable performance across repeated inspections and long-term usage cycles.
Traceability is maintained through batch identification and inspection records, allowing reliable quality monitoring, corrective action support, and confidence for customers requiring documented compliance with industrial quality assurance practices.
Final inspection ensures dimensional stability, proper marking, and flawless thread form before dispatch, guaranteeing screw plug gauges meet required inspection standards and deliver accurate, repeatable results in real machining and production environments

Reliable Thread Inspection Across Diverse Engineering Sectors

Automotive manufacturing relies on screw plug gauges for accurate inspection of engine components, transmission housings, and threaded fasteners, ensuring reliable assembly fitment, safety compliance, and smooth production flow in high-volume machining operations.
Screw plug gauges are used by aerospace component manufacturers to verify internal threads in precision parts, where dimensional accuracy, repeatability, and strict tolerance control are essential for safety-critical assemblies and long-term operational reliability.
Heavy engineering industries depend on screw plug gauges for checking large threaded components, ensuring strong mating fit, proper load distribution, and dependable performance in equipment exposed to high stress and demanding working conditions.
Dedicated Impex supplies screw plug gauges to general engineering workshops for routine thread inspection across varied components, helping maintain machining accuracy, reduce rejection rates, and ensure consistent quality output for diverse industrial applications.
Die and mold manufacturing requires precise thread inspection using screw plug gauges to ensure accurate assembly of mold components, smooth operation, and reliable performance throughout repeated production cycles.
Screw plug gauges are applied by industrial equipment manufacturers during in-process and final inspection to confirm thread accuracy, ensuring proper compatibility of assembled parts and minimizing costly rework or potential field failures.
Dedicated Impex Co. provides screw plug gauges to precision machining units to support quality assurance processes, helping meet customer specifications, maintain dimensional control, and deliver consistent, inspection-approved threaded components across production batches.

Protective Packing Designed for Long-Distance Tool Safety

Screw plug gauges are packed in protective sleeves and individual holders to prevent thread damage, surface scratches, and corrosion during long-distance handling, ensuring tools reach customers in perfect, inspection-ready condition without affecting accuracy or surface quality.
Dedicated Impex uses moisture-resistant packing materials and protective coatings to safeguard screw plug gauges from humidity, temperature changes, and environmental exposure commonly faced during extended overseas transportation and storage conditions.
Each gauge is securely positioned to avoid internal movement inside the package, reducing impact risk and maintaining dimensional accuracy throughout shipping, warehouse storage, and final delivery to international inspection and machining facilities under varied handling and transport conditions worldwide.
Strong outer cartons and reinforced packing structures provide added protection against crushing, vibration, and stacking pressure, ensuring screw plug gauges remain safe and undamaged during container loading and global logistics operations.
Clear labelling and organized packing layouts help identify gauge sizes, specifications, and quantities easily, supporting smooth customs clearance, efficient warehouse handling, and quick inspection upon arrival at the customer’s location.
Packaging design supports bulk shipment efficiency while maintaining individual tool protection, balancing space optimization with safety to reduce transit damage and improve overall delivery reliability for worldwide customers.
DIC Tools ensures export-ready packaging so screw plug gauges arrive clean, secure, and ready for immediate use, helping customers avoid repacking efforts, cleaning delays, or inspection issues caused by transit-related damage.

Product FAQ's

1. What is a Screw Plug Gauge?

A Screw Plug Gauge is a precision measuring tool used to inspect the internal threads of nuts, bolts, and other threaded components. It ensures thread conformance and maintains accurate assembly performance in industrial applications.

2. What types of Screw Plug Gauges are available?

Screw Plug Gauges are generally available in Go and No-Go types. The "Go" gauge verifies the minimum acceptable size, while the "No-Go" gauge ensures the thread does not exceed the maximum tolerance.

3. What materials are used to make Screw Plug Gauges?

These gauges are typically made from hardened tool steel, offering high durability and wear resistance. Some specialized versions may use stainless steel or carbide for extreme precision and long-term performance.

4. What standards do Screw Plug Gauges follow?

Screw Plug Gauges are manufactured according to ISO Metric, ANSI, and ASME (UNC/UNF) standards. Compliance ensures compatibility with global thread specifications and consistent quality across manufacturing and inspection processes.

5. What is the typical hardness of Screw Plug Gauges?

The gauges usually have a hardness between 58–64 HRC, providing excellent wear resistance while maintaining precise thread measurement capabilities over repeated usage in industrial environments.

6. What is the size range of Screw Plug Gauges?

Screw Plug Gauges are available in M2 to M200 metric sizes or custom sizes based on requirements. This wide range allows them to be used for small precision components as well as large industrial threads.

7. What thread forms can be checked with Screw Plug Gauges?

They can measure Metric, UNC, UNF, BSP, and NPT thread forms. Custom threads can also be accommodated, ensuring versatility across different industrial applications and thread standards.

8. Can Screw Plug Gauges be customized?

Yes, Dedicated Impex can be customized screw plug gauges according to size, thread form, and tolerance requirements. Customization allows manufacturers to meet specific production standards and specialized industrial applications efficiently.

Need Additional Support?

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