Osg 1500301505 Thread Limit Gage 3/4-16 3B Tin

Product Description

The OSG 1500301505 is a double-end Go/No-Go thread limit gage designed to inspect 3/4-16 UN(J)F threads to a 3B tolerance classification. Built from high-speed steel with a TiN (titanium nitride) coating, the gage provides hardness and wear resistance suited to high-volume inspection environments. The Go end confirms the thread falls within the minimum material condition, while the No-Go end confirms it does not exceed the maximum. Both ends are calibrated at the factory. Machinists, quality control technicians, and tool room professionals use this gage to verify part conformance on the production floor or at incoming inspection.

This gage is applied wherever 3/4-16 UN(J)F 3B internal threads require dimensional verification — including threaded bores in machined components, fastener assemblies, and hydraulic fittings. The double-end design consolidates both Go and No-Go functions into a single tool, reducing gage inventory and handling time. It suits both low-volume job shops and higher-throughput production lines where consistent thread inspection is required by quality systems such as ISO 9001 or AS9100.

Key Features

• Inspects 3/4-16 UN(J)F internal threads to 3B tolerance class
• Double-end design — Go and No-Go on a single gage body
• High-speed steel construction for durability and long service life
• TiN coating improves surface hardness and reduces wear on thread flanks
• Factory calibrated prior to shipment
• UNSPSC Code: 41111607

Compatibility

Designed for inspection of 3/4-16 UN(J)F 3B class internal threads per ASME B1.1 unified inch screw thread standards.

Installation Notes

Thread limit gages should be handled and stored according to ASME B47.1 gage tolerance guidelines. Do not force the Go end through a thread — smooth hand engagement under light pressure is the correct technique. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the high-speed steel. Periodic re-calibration intervals should be established based on usage frequency and your quality management system requirements.