Alpha
Alpha 1/2" Back Nut 1.026930
Lowered brass back nut with a 1/2" female thread, listed by Alpha as a boiler spare for compatible gas boilers.
At a glance
- Also known as 12-BACK-NUT, 1258365
£4.61
£3.84 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 Alpha 1/2" back nut, part 1.026930, is a lowered brass nut with a 1/2" female thread. It is used to secure a threaded connection on compatible Alpha gas boilers. Alpha lists it as a boiler spare under screws, nuts, bolts and clips.
Signs this part needs replacing
- Weeping or dripping at the threaded joint
- Visible corrosion or scaling on the brass
- Rounded or damaged flats where a spanner locates
- The nut will not tighten or hold its position
- Water staining around the connection
Before you order
- Confirm your boiler model against the fitment list above
- Check the existing nut is a 1/2" lowered brass type
- Note the GC number where shown to confirm the variant
- Inspect the thread and seating face for damage before refitting
Compliance
| Alternative numbers | 12-BACK-NUT, 1026930, 1258365 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA InTEC 30GS ErP | — | — | — | |
| ALPHA ALPHA InTEC 30GS ErP (LPG) | — | — | — | |
| ALPHA ALPHA InTEC 40GS ErP | — | — | — | |
| ALPHA ALPHA InTEC 40GS ErP (LPG) | — | — | — | |
| ALPHA ALPHA InTEC 50CS | — | — | — | |
| ALPHA ALPHA SOLARSMART 100 DRAIN BACK UNIT | — | — | — | |
| ALPHA INTEC 40GS2 | — | — | — | |
| ALPHA InTEC 30GS | 47-532-50 | 47-532-50 | — | — |
| ALPHA InTEC 30GS (LPG) | 47-532-57 | 47-532-57 | — | — |
| ALPHA InTEC 30GS ErP | 47-532-50 | 47-532-50 | — | — |
Showing 10 of 18 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.
ALPHA appliance manual — INTEC 40GS2
manualmanualALPHA appliance manual — InTEC 30GS (GC 47-532-50), InTEC 30GS (LPG) (GC 47-532-57), InTEC 40GS (GC 47-532-51), InTEC 40GS (LPG) (GC 47-532-58)
manualmanualALPHA appliance manual — InTEC 30GS ErP (GC 47-532-50), InTEC 30GS ErP (LPG) (GC 47-532-57), InTEC 40GS ErP (GC 47-532-51), InTEC 40GS ErP (LPG) (GC 47-532-58)
manualmanualALPHA appliance manual — InTEC 50CS
manualmanualALPHA appliance manual — SOLARSMART 100 DRAIN BACK UNIT
manualmanualALPHA appliance manual — WALL HUNG FLOWSMART 50
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