Sime
Sime Brass Nut 3/8 Inch 6146305
Sime 6146305 brass nut, 3/8 inch, for the expansion vessel connection on compatible Sime gas boilers.
At a glance
- Part type: brass nut
- Also known as BRASS-NUT-38, 2040564
£3.12
£2.60 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Sime 6146305 is a 3/8 inch brass nut used at the expansion vessel connection on Sime gas boilers. It forms part of the expansion vessel assembly, where it provides a threaded connection point. This spare is listed in the screws, nuts, bolts and clips category for Sime gas boiler spares.
Signs this part needs replacing
- Water weeping or staining around the expansion vessel connection.
- Visible corrosion, cracking or deformation on the brass nut.
- Thread damage or cross-threading that prevents a tight seal.
- Repeated pressure loss traced to the expansion vessel connection.
- The nut cannot be tightened to form a watertight joint.
Before you order
- Confirm the appliance model and GC number against the fitment list.
- Check that the existing component is a 3/8 inch brass nut on the expansion vessel connection.
- Verify the part number 6146305 matches the part being replaced.
- Inspect the mating thread and expansion vessel connection for damage before fitting.
Compliance
| Alternative numbers | BRASS-NUT-38, 2040564 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME CLIMIT GG M 23 BF MET - 8105460 | — | — | — | |
| SIME CLIMIT GG M 23 OF MET - 8105550 | — | — | — | |
| SIME CLIMIT GG M 28 BF MET - 8105461 | — | — | — | |
| SIME CLIMIT GG M 28 OF MET - 8105551 | — | — | — | |
| SIME CLIMIT GGF 23 OF MET - 8104605 | — | — | — | |
| SIME CLIMIT GGF 28 BF MET - 8104668 | — | — | — | |
| SIME CLIMIT GGF 28 OF MET - 8104606 | — | — | — | |
| SIME DEWY HE 30/50 WM - 3830011 | 47-719-23 | 47-719-23 | — | — |
| SIME ECOMFORT 25HE | 47-283-06 | 47-283-06 | — | — |
| SIME ECOMFORT 30HE | 47-719-25 | 47-719-25 | — | — |
Showing 10 of 97 compatible appliances.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
SIME appliance manual — DEWY HE 30/50 WM - 3830011 (GC 47-719-23)
manualmanualSIME appliance manual — ECOMFORT 25HE (GC 47-283-06), ECOMFORT 30HE (GC 47-719-25), ECOMFORT 35HE (GC 47-283-09), ECOMFORT SYSTEM 25HE (GC 41-283-04)
manualmanualSIME appliance manual — ECOMFORT PLUS 25HE - 8104012 (GC 47-283-13), ECOMFORT PLUS 25HE SYSTEM - 8104013 (GC 41-283-10), ECOMFORT PLUS 30 HE - 8104011 (GC 47-283-14)
manualmanualSIME appliance manual — FORMAT 100B LPG - 8105403 (GC 47-283-08), FORMAT 100B NATURAL GAS - 8105402 (GC 47-283-08), FORMAT 80B LPG - 8105401 (GC 47-283-07), FORMAT 80B NATURAL GAS - 8105400 (GC 47-283-07)
manualmanualSIME appliance manual — FORMAT 100C - 8098456 (GC 47-719-13), FORMAT 100C LPG - 8098455 (GC 47-719-13), FORMAT 110C (GC 47-719-21), FORMAT 80C - 8098454 (GC 47-719-12), FORMAT 80C LPG - 8098459 (GC 47-719-12)
manualmanualSIME appliance manual — FORMAT SYSTEM 24 LPG - 8098471, FORMAT SYSTEM 24 NATURAL GAS - 8098470 (GC 41-719-15), FORMAT SYSTEM 30 NATURAL GAS - 8098472 (GC 41-719-16)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.