Faithfull 52-Leaf Screw Pitch Gauge | Metric & Whitworth
Faithfull 52-Leaf Screw Pitch Gauge | Metric & Whitworth is backordered and will ship as soon as it is back in stock.
Faithfull 52-Leaf Screw Pitch Gauge | Metric & Whitworth is backordered and will ship as soon as it is back in stock.
The Faithfull Screw Pitch Gauge is an essential diagnostic tool designed for engineering, automotive, and maintenance professionals who require absolute certainty when identifying thread sizes. Featuring a comprehensive selection of 52 precision-cut leaves, this versatile tool eliminates the guesswork out of matching fasteners by measuring both Metric and Whitworth pitch profiles. Whether you are sorting unlabelled stock in a workshop, restoring classic machinery, or selecting the correct tap and die set for a fabrication project, this gauge provides a rugged, highly reliable solution for rapid and accurate thread verification.
Identifying unknown fastners by eye can lead to costly errors, stripped threads, and project delays. The Faithfull 52-Leaf Screw Pitch Gauge provides a fast, foolproof method to determine the exact pitch of any internal or external thread. By offering both Metric and Whitworth profiles within a single pocket-sized tool, it serves as an invaluable asset across automotive repair, heavy industrial maintenance, and heritage restoration projects.
The design relies on a folding pocket-knife style arrangement. At each end of the protective steel housing, a series of precisely machined teeth profiles are stacked together. To check a thread, you simply fan out the blades and press the teeth against the grooves of your screw or bolt. When the correct blade is found, the teeth will mesh perfectly with the thread without leaving gaps or riding up over the crests.
This model is particularly helpful when working with older machinery or mixed fleets where British Standard Whitworth (BSW) and modern Metric fasteners exist alongside one another. The dual-ended layout separates the two standards cleanly, allowing you to switch between measurement systems seamlessly. Each blade is stamped with its precise size value, ensuring that once you find a match, you can immediately read the measurement without searching for a conversion chart.
Built to withstand the conditions of a busy workshop, the gauge includes adjustable locking wheels at both pivots. These thumbscrews allow you to tighten down the assembly to hold a single leaf steady during a check, or loosen the friction to quickly sort through the stack. When the job is finished, all 52 leaves fold entirely within the rugged outer frame, preventing the teeth from getting bent, nicked, or contaminated by grease and debris in your toolbox.
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Faithfull 52-Leaf Screw Pitch Gauge | Metric & Whitworth
Frequently Asked Questions
How do I know if I have matched the correct thread pitch using this gauge?
How do I know if I have matched the correct thread pitch using this gauge?
To verify a thread, light up the fastener from behind and press the selected leaf firmly into the thread path. If it is a correct match, the teeth of the blade will seat completely flush into the grooves without any visible gaps, rocking motion, or light shining through.
Can this tool be used to measure both internal and external threads?
Can this tool be used to measure both internal and external threads?
Yes. The narrow, pointed profile of each leaf allows it to be inserted into female threads (such as nuts or tapped holes) just as easily as it can be pressed against external male threads on a bolt or stud.
Are the size markings permanent?
Are the size markings permanent?
Each leaf is stamped directly into the metal with its specific measurement. Unlike printed labels, these stamped markings will not rub off or fade when exposed to grease, oil, and workshop solvents.
