2.5 × 1.5 mm single-bore alumina insulator
OD 2.5 mm · bore Ø1.5 mm · wall 0.5 mm
- Standard size · usually in stock
A thin alumina tube with one bore. It sleeves a single wire or lead and insulates it at high temperature.
Specifications
Nominal dimensions from our factory's standard-size list, September 2026.
| Outside diameter (OD) | 2.5 mm |
|---|---|
| Bores | 1 bore |
| Bore diameter | Ø1.5 mm |
| Wall thickness | 0.5 mmcomputed: (OD − ID) ÷ 2 |
| Length | Cut to order |
| Availability | Usually ships from stock in 3–7 days |
| Material and grade | Alumina. Grades: 99.5% Al₂O₃ (C799-class) as standard, plus 99.7%, 99% and 95%, all available. The grade and bore layout are confirmed per SKU at quotation. |
Our protection tubes it fits
Protection tubes from our standard list whose ID is at least 1 mm larger than this insulator's 2.5 mm OD.
How we worked it out: insulator OD + 1 mm ≤ tube ID, on nominal sizes, which leaves room for the tolerances of both parts. Check the fit against your own drawing.
Tolerances on our 2026 orders
No order tolerance is on record for this size yet. We state the tolerance in the quotation.
Ordering
- Minimum order, non-standard parts
- 100 pcs
- Usually, per item made to your drawing or sample.
- Samples for approval
- 5–10 pcs
- Usually sent for you to approve before the order runs.
- Production lead time
- 25–30 days
- Usual production cycle for non-standard parts.
- Standard sizes from stock
- ~3–7 days
- Stock covers most standard sizes. Small orders ship in about 3 days, bulk orders in about 7 days.
Typical terms. Quantities and dates for your order are confirmed in its quotation.
Nearby sizes
Request a quote
Get a quotation for the 2.5 × 1.5 mm single-bore insulator.
Tell us the dimensions, grade and quantity. We confirm the grade, dimensions and tolerances in each quotation. Our yearly lab reports are available on request.