# Pyrex Heat Resistant Clear Colorless Borosilicate 3.3 Solid Glass Rod

> Pyrex Heat Resistant Clear Colorless Borosilicate 3.3 Solid Glass Rod — a precision glass tube / rod: Borosilicate Glass. Specs, RFQ checklist and custom…

- Page: https://machiningglass.com/products/pyrex-heat-resistant-clear-colorless-borosilicate-3-3-solid-glass-rod/
- SKU: MG-CD93E1
- Category: Laboratory & Analytical Glass > Precision Glass Capillaries, Tubes & Rods
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Pyrex-Heat-Resistant-Clear-Colorless-Borosilicate-3-3-Solid-Glass-Rod.webp
- Updated: 2026-10-24

Product type: Rod. Application: Chemistry. Model: JSV-BSR.

## Overview

The Pyrex Heat Resistant Clear Colorless Borosilicate 3.3 Solid Glass Rod is supplied as a precision glass tube / rod made from Borosilicate Glass. Listed geometry: round shape. Typical applications: Chemistry. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Type | Rod |
| Shape | Round |
| Application | Chemistry |
| Color | Transparent |
| Model NO. | JSV-BSR |
| Glass Type | Borosilicate Glass |
| Processing | Cutting, Fire Polishing, Sealing |
| Production | Furnace |
| Feature | Heat Resistant |
| Physical Data | 1 |
| Data | 1 |
| Supplier | Jinan JSV Industrial Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| Product Name | Borosilicate 3.3 glass rod |
| Size | Diameter from 2mm to 55mm |
| Processing | Cutting, grinding, polishing, fire polishing, annealing, drilling, sandblasting, coating, sealing, Joining, bending, pressing |
| Shape | Round, triangle, hexagonal |
| Packing | Carton, pallet, wooden crate |

|   |   |   |   |
| --- | --- | --- | --- |
| 1 | Coefficient of mean linear thermal expansion (20ºC~310ºC) | 3.3 | 10-6K-1 |
| 2 | Density | 2.23 | g/cm3 |
| 3 | Transformation temperature | 525 | °C |
| 4 | Softening Point | 820 | °C |
| 5 | Working Point | 1250 | °C |

|   |   |   |   |
| --- | --- | --- | --- |
| 1 | Hydrolytic resistance (ISO 719) | ISO 719 | HGB 1 |
| 2 | Acid resistance | DIN 12116 | S 1 |
| 3 | Alkali resistance | ISO 695 | A 2 |

## What to specify when you request a quote

- **Material** — listed as “Borosilicate Glass”; name the glass (borosilicate 3.3, quartz, soda-lime).
- **OD, ID and wall** — listed as “JSV-BSR”; give outer and inner diameter or wall and their tolerances.
- **Length and ends** — give length, end finish and any closed or flared ends.
- **Straightness and bore** — state straightness and bore tolerance for precision tubing.

## Engineering guides for this part

For material grades and coating options, see [Borosilicate Glass 3.3: Material & Coating Guide for Machined Parts](https://machiningglass.com/materials/borosilicate-glass-3-3-material-coating-guide-for-machined-parts/). How parts like this are machined and finished is covered in [Precision Bore Glass Tubing Processing: End-to-End Manufacturing for Industrial Buyers](https://machiningglass.com/capabilities/precision-bore-glass-tubing-processing-end-to-end-manufacturing-for-industrial-buyers/). For an application example, read [Quartz Glass Windows for High-Temperature Appliance Modules](https://machiningglass.com/applications/quartz-glass-windows-for-high-temperature-appliance-modules/). Before sending a drawing, check [Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica](https://machiningglass.com/resources/quartz-glass-manufacturing-controlling-thermal-conductivity-in-fused-silica/). A related standard product is [4-inch Borofloat 33 Glass Wafers](https://machiningglass.com/products/4-inch-borofloat-33-glass-wafers/).

## FAQ

### What is the Pyrex Heat Resistant Clear Colorless Borosilicate 3.3 Solid Glass Rod made of?

It is listed as Borosilicate Glass. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### Where is this precision glass tube / rod used?

Listed applications: Chemistry.

### What should I include in a quote request?

Include material, od, id and wall, length and ends and straightness and bore, plus quantity and a drawing if the part is custom.

## Request a quote

Send drawings, tolerances and quantity: https://machiningglass.com/contact/?rfq_product_id=19911#mg-rfq

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Source: Custom Precision Glass Machining — https://machiningglass.com/