Alpha
Alpha Nut 1/2 Inch 16mm Hole 1.011988
A 1/2 inch nut with a 16 mm hole from Alpha, listed for the Alpha Solarsmart 100 Drain Back Unit.
At a glance
- Also known as 1258964
Showing prices
£4.61
£3.84 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
This is a 1/2 inch nut with a 16 mm hole, manufactured by Alpha and identified by part number 1.011988. It is listed for use with the Alpha Solarsmart 100 Drain Back Unit.
Signs this part needs replacing
- Corrosion or surface pitting on the nut
- Rounded or damaged flats on the hex
- Threads that are stripped, crossed or will not run freely
- The nut will not tighten or hold its position
- Weeping or seepage at the joint the nut secures
Before you order
- Confirm the thread size required is 1/2 inch
- Confirm the hole diameter required is 16 mm
- Check your appliance model against the Alpha Solarsmart 100 Drain Back Unit
- Check how many nuts are needed for the job
Compliance
| Alternative numbers | 1258964 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA SOLARSMART 100 DRAIN BACK UNIT | — | — | — | |
| ALPHA SOLARSMART 100 DRAIN BACK UNIT | — | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
No technical questions yet for this part.
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