Metric and imperial leaves live on the same tool, and get mixed up · review
A 52-leaf stainless set covering 24 metric pitches from 0.25 to 6.0 mm (0.01 to 0.24 in) at 60° and 28 imperial pitches from 4G to 62G at 55°, folding into a pocket-sized body.
What the figures leave us with A standard 52-leaf set at the lowest price, with its coverage properly stated. Nothing more, which is all this tool is.
A thread gauge answers one question, and every set here answers it the same way.
A set of 52 leaves: 24 metric gauges covering 0.25 to 6.0 mm (0.01 to 0.24 in) at a 60° angle, and 28 imperial gauges covering 4G to 62G at 55°. Robust stainless steel with high corrosion and wear resistance, stated to keep the measuring accuracy through frequent use. Precise angle profiles and smooth surfaces with legible markings. A folding design for storage in a toolbox or pocket.
All four sets in this hub are 52-leaf stainless assemblies at six to nine euros, and they cover the same pitch ranges. There is no accuracy figure to compare, no meaningful material difference, and no mechanism to fail beyond the pivot. What separates them is whether the maker prints the actual pitch list — the BGS does, and the rest state ranges.
Metric and imperial leaves on the same pivot sit side by side, and a 1.25 mm (0.05 in) metric leaf lives a few positions from a 20 TPI imperial one. Reading the stamp rather than trusting the position is the whole discipline of using the tool.
Catalogued and unsold: the American Amazon shop lists the reference with nobody behind it.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
| Amazon reference | B0H33TYG82 (identical on 4 markets) |
|---|---|
| EAN | 0606762045046 |
| Leaves | 52 leaves |
| Scale | 24 metric 0.25–6.0 mm (0.01 to 0.24 in) · 28 imperial 4G–62G |
| Material | stainless |
Metric ISO threads have a 60° flank angle; Whitworth and BSP imperial threads have 55°. Matching the pitch on the wrong angle family gives a leaf that almost fits, which is the most common misidentification.
Hold the matched leaf and the thread up to a light. Any daylight between the teeth means it is the neighboring pitch — by feel alone the two are indistinguishable.
It is the standard set size, and it exists because the alternative is discovering the one pitch you need is the one missing. The four sets in this hub all carry 52.
7.3/ 10
A standard 52-leaf set at the lowest price, with its coverage properly stated. Nothing more, which is all this tool is.
A reference exists on these Amazon stores: France, Germany, Spain, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 31, 2026.
A first thread gauge, where the job is identifying a bolt rather than certifying it.
Specifications: the manufacturer sheet for measuring instruments and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
52 leaves · every metric ISO pitch listed · trade catalog reference
The only set here that prints its contents: BGS lists every metric ISO pitch it carries, from 0.25 to 4.0 mm (0.01 to 0.16 in) and beyond, rather than quoting a range.
Best for: Anyone who wants to know a specific pitch is in the set before buying it.
52 leaves · metric and imperial · 60° to international standards
A 52-leaf stainless set stating that its metric leaves follow the internationally recognized 60° angle, with clearly visible markings on each leaf.
Best for: The same job as every other 52-leaf set — pick on price and on which one is in stock.
52 leaves · metric 0.25–6.0 mm (0.01 to 0.24 in) 60° · imperial 4G–62G 55° · radius gauge included
A 52-leaf stainless set that also includes a radius gauge, and the only set in this hub sold across five European markets.
Best for: Anyone who wants the thread gauge available across Europe rather than on one market.
