Slotted or unslotted — get this wrong and it leaks · review
A pair of chrome click-clack plug tops in zinc alloy, with an 0.31 in (8 mm) screw hole.
Three different things are sold on this shelf and the titles blur them.
Complete assemblies: Kraus $34.95, Kohler $99.99 — body, tailpiece and stopper. Plug tops: this at $9.66 for two, Tong Gu at $7.99 — the visible cap, with nothing inside it. Pop-up bolts: UXELY $7.79, ALI2 $9.99 for two — the spring mechanism, with no cap.
So push your cap down before ordering. If it springs and latches but looks terrible, the cap is the problem and this is the part. If it has stopped latching, the mechanism has failed and you want a bolt.
They unscrew from each other at an 0.31 in (8 mm) thread.
Four dollars eighty-three each, the cheapest cap on this shelf — and two in the pack, which on a part this small is genuinely useful. One goes in, one goes in the drawer for the other sink or the next time.
The Tong Gu cap is $7.99 for one.
The title says 2.60 in (66 mm). The third bullet says 2.56 in (65 mm).
Same listing, same dimension, one millimeter apart.
It matters less than it looks, because a click-clack cap sits on the drain body rather than inside the ceramic, so a millimeter of overhang is usually invisible.
But it is clearly why bullet five exists: Please measure your size before you choose it.
Measure the old cap across the top. Sixty-five or sixty-six is the standard — Tong Gu publishes 2.60 in (66 mm), the Kraus cap is 2 5/8 inches, which is 66.7. If yours is nearer 60 or nearer 70, this is not the part.
Zinc alloy.
Three other parts on this shelf are brass: the ALI2 and UXELY bolts, and the Tong Gu cap.
Zinc alloy — zamak — casts cheaply and plates beautifully, which is why handles and trim are made of it. Its weakness is standing water: it pits, and because chrome is only a plating, a pit lifts the chrome around it, so one small blemish spreads into a gray patch.
Brass corrodes much more slowly, and benignly.
A click-clack cap sits in water every time the sink is filled and in damp air the rest of the time. That is close to the worst case for zinc.
At $4.83 against $7.99 for one brass cap, there is a defensible argument either way — and with two in the pack you can simply replace it again in three years. It is worth knowing which bargain you are making.
No height. The UXELY bolt on this shelf publishes three heights; neither cap publishes one.
No drain hole size. Tong Gu publishes 1.42 to 1.5 in (36 to 38 mm); this does not.
And two of the five bullets repeat each other, and the description repeats all five.
Available at around $9.66 on Amazon.com when we checked on October 29, 2026, for delivery to a US address.
Stock and prices on Amazon.com move without notice; the button above opens the live listing.
Prices quoted in this text were read on October 29, 2026. The live price is at the top of the page.
| Thread size | An 0.31 in (8 mm) screw hole, which is the M8 standard on this shelf — THE VISIBLE CAP ONLY, with NO MECHANISM INSIDE and no bolt included. Two pieces at $4.83 each. The diameter is published TWO WAYS: 2.60 in (66 mm) in the title and 2.56 in (65 mm) in the bullets. The maker's own advice is to measure your size before choosing. Five published bullets, two of which repeat each other. |
|---|---|
| Slotted or unslotted | NOT PUBLISHED, and neither is the DRAIN HOLE SIZE IT SUITS, where Tong Gu on this shelf publishes 1.42 to 1.50 in (36–38 mm) — so nothing on this listing tells you whether it will seat in your drain. |
| Operating mechanism | NONE — it is a cap, pushed by whatever bolt you already have. |
| Height under the sink | NOT PUBLISHED BY THE MAKER. |
| Material and finish | Chrome on HIGH QUALITY ZINC ALLOY — NOT BRASS, where three other parts on this shelf are brass, and zinc alloy is the one metal here that will not take years of standing water. 2.4 oz (68 g) for two, 1.2 oz (34 g) each. No warranty is published. |
| Amazon reference | B09JJQ71L9 |
| EAN | 0645688830893 |
The listing says both: the title reads 2.60 in (66 mm) and the third bullet reads "The chrome plug diameter is 65mm (2.56 in)". One millimeter, in the same listing, on the dimension that decides whether the cap sits properly in the sink outlet. It matters less than it sounds, because a click-clack cap sits on the drain body rather than inside the ceramic — so a millimeter of overhang either way is usually invisible. But it is the reason the fifth bullet says what it says: "Please measure your size before you choose it." Measure the old cap across the top with a ruler, and if it is nearer 2.36 in (60 mm) or nearer 2.76 in (70 mm), this is not the part.
Noticeably, in this application, and it is worth being plain about. Zinc alloy — zamak — is cast cheaply and plates well, which is why it is used for handles and trim. Its weakness is corrosion in standing water: it pits, and because the chrome is only a plating, a pit lifts the chrome around it so a small blemish spreads into a gray patch. Brass corrodes far more slowly and benignly. A click-clack cap sits in water every time the sink is used and in damp air the rest of the time, which is close to the worst case. Three parts on this shelf are brass — the ALI2 and UXELY bolts and the Tong Gu cap — and the Tong Gu cap is $7.99 for one, $3.16 more than one of these.
If the bolt underneath is M8, yes — and that is the standard on all four cheap parts here. The cap simply screws onto the top of the pop-up bolt, and the two are sold separately on this shelf precisely because either can fail on its own. What this listing does not publish is the height, which the UXELY bolt does give in three figures, nor the drain hole diameter it suits, which the Tong Gu cap publishes as 1.42 to 1.50 in (36 to 38 mm). If the cap is all that is wrong, those omissions matter little: unscrew the old one, screw this on.
Same category, nearby prices, between bathroom fittings. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Thread size | Slotted or unslotted | Operating mechanism | Height under the sink |
|---|---|---|---|---|---|
| FASTROHY click-clack drain plug tops | $10 | An 0.31 in (8 mm) screw hole, which is the M8 standard on this shelf — THE VISIBLE CAP ONLY, with NO MECHANISM INSIDE and no bolt included. Two pieces at $4.83 each. The diameter is published TWO WAYS: 2.60 in (66 mm) in the title and 2.56 in (65 mm) in the bullets. The maker's own advice is to measure your size before choosing. Five published bullets, two of which repeat each other. | NOT PUBLISHED, and neither is the DRAIN HOLE SIZE IT SUITS, where Tong Gu on this shelf publishes 1.42 to 1.50 in (36–38 mm) — so nothing on this listing tells you whether it will seat in your drain. | NONE — it is a cap, pushed by whatever bolt you already have. | NOT PUBLISHED BY THE MAKER. |
| ALI2 click-clack pop-up bolts, 2-pack | $10 | M8 at the top, M16 × 1.5 at the bottom — the same two threads as the UXELY bolt on this shelf. THE BOLT AND SPRING MECHANISM ONLY, cap not included. Two pieces at $5.00 each. | SUITED TO OVERFLOW SINKS, per the maker — which is the slotted case, and the only statement of it on this shelf among the bolt-only parts. | Push to close and seal, push again to open and drain. The maker states it collects hair neatly and prevents it clogging. | 1.10 in (28 mm) CLOSED, AND NOTHING ELSE: the popped-up height is not published, where UXELY gives 1.52 in (38.5 mm), and neither is the overall height, where UXELY gives 2.30 in (58.3 mm). So the travel — the whole point of a spring bolt — cannot be worked out from this listing. |
| Tong Gu brass pop-up plug cap | $8 | A nominal 1/3 in (8 mm) screw — the M8 standard — stated to fit a standard M8 pop up plug bolt. THE VISIBLE CAP ONLY, and the maker states explicitly that THE BOLT IS NOT INCLUDED. One piece at $7.99 on October 29, 2026, against $4.83 each for the zinc alloy pair on this shelf. 2.6 in / 66 mm diameter, 2.60 × 2.60 × 2.60 in (66 × 66 × 66 mm). | NOT PUBLISHED as such, but it is the ONLY PART ON THIS SHELF THAT PUBLISHES THE DRAIN HOLE IT SUITS: 1.4 to 1.5 in / 1.42 to 1.50 in (36 to 38 mm). That one figure is what the other cap here leaves you to guess. | NONE — it is a cap, driven by the bolt you supply. | NOT PUBLISHED BY THE MAKER. |
| UXELY pop-up drain bolt assembly | $8 | M8 at the top, M16 × 1.5 at the bottom — THE BOLT AND SPRING MECHANISM ONLY, and THE CAP IS NOT INCLUDED. One piece, 1.77 × 0.59 × 0.59 in (45 × 15 × 15 mm). | NOT APPLICABLE — a bolt has no slot. Whether your sink needs a slotted drain is settled by the cap, which this part does not include. | A spring mechanism with a screw thread push. | 2.30 in (58.3 mm) overall — 1.52 in (38.5 mm) popped up, 1.10 in (28 mm) closed. IT IS THE ONLY PART ON THIS SHELF THAT PUBLISHES ALL THREE, and the 0.41 in (10.5 mm) of travel is what the spring actually gives you. |
This model is listed on Amazon.com, at ≈ $10 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on October 29, 2026.
A cracked or pitted click-clack cap, where two for nine dollars means one spare in the drawer
Specifications: the manufacturer sheet for bathroom fittings and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
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