NPT and NPTF pipe thread gauges, plus BSP, Metric, Unified, and BSW. Plug, ring, and setting gauges as matched pairs for production and incoming inspection.
Thread gauges are precision measuring instruments used to verify the accuracy of screw threads. They ensure that threaded components meet specified tolerances and will properly mate with their intended counterparts. Thread gauges are essential in manufacturing for quality control of bolts, nuts, screws, and threaded holes.
As a manufacturer of NPT thread gauges, DSN Enterprises cuts NPT and NPTF plug gauges, ring gauges, and setting systems in-house, alongside BSP, Metric, Unified, and BSW — so pipe-thread gauge sets and working/reference pairs come from one Coimbatore works with matched calibration.
M1 to M100, coarse and fine pitch
American standard threads
Whitworth and fine threads
Parallel and taper pipe threads
National pipe taper threads
Power transmission threads
Pitch diameters, minor diameters and tap drills for every thread form we cut, on the thread reference charts. Per-size pages for M6 through M20 give the coarse and fine series for that size.
Comprehensive range of thread gauges for all standard thread forms and custom specifications.
Metric, UNC, UNF, BSW, BSF, BSP & more
Precision thread plug gauges for accurate internal thread inspection. Available in GO and NO-GO configurations for quick verification of female threads in manufactured parts.
Metric, UNC, UNF, BSW, BSF, BSP & more
Precision thread ring gauges for external thread inspection. Essential tools for verifying male threads on bolts, studs, and threaded components.
All standard thread forms
Master gauges used for setting and calibrating thread ring gauges. Essential reference standards for maintaining accuracy of working gauges.
NPT, NPTF, BSPT & API threads
Specialized gauges for inspecting tapered pipe threads. Critical for ensuring proper sealing in pipe connections for oil, gas, and fluid handling systems.
M1 to M100, Fine & Coarse Pitch
Complete range of metric thread gauges for both coarse and fine pitch threads. Manufactured to ISO standards for global compatibility.
UNC, UNF, UNEF - All sizes
American standard unified thread gauges for inspection of UNC (coarse), UNF (fine), and UNEF (extra fine) threads widely used in aerospace and automotive industries.
Used to inspect internal threads (tapped holes). The GO member should enter freely, while the NO-GO member should not enter more than 2-3 turns.
Used to inspect external threads (bolts, studs). The GO ring should pass over the thread, while the NO-GO ring should not pass beyond 2-3 turns.
Master gauges used to set and verify thread ring gauges. Essential for maintaining calibration accuracy of working gauges.
| Material | OHNS (W) / Tungsten Carbide |
| Hardness | 60 ± 2 HRC |
| Treatment | Sub-Zero at -80°C |
| Thread Accuracy | As per IS/ISO/ANSI Standards |
| Surface Finish | Ground/Lapped Finish |
| Certification | NABL Certificate Available |
We manufacture thread plug gauges in Coimbatore and supply plants across Tamil Nadu. City pages cover local logistics and the gauging problem that actually dominates there.
We manufacture thread gauges for all standard and special thread forms. Contact us for custom specifications, bulk orders, or technical support.