Hoffman Screw
Product Code : JA-CE-4304
The Hoffman Screw (SKU JA-CE-4304) is a copper screw clip that squeezes a length of rubber or plastic tubing between two jaws, so the flow of liquid or gas through the tube can be closed completely or throttled by turning the screw. This Hoffman screw clip is a small but regular item in school and college chemistry sets, used on gas-generation apparatus, siphons and tubing outlets. JaincoLab supplies it in quantity for laboratory stores.
Specifications
The Hoffman screw is made of copper and works as a screw-tightened clip on flexible tubing; the product data gives no jaw opening or tubing diameter range, so the size that suits your tubing is confirmed on the quotation.
| Product | Hoffman Screw |
| SKU | JA-CE-4304 |
| Material | Copper |
| Type | Screw clip for flexible tubing |
| Use | Shutting off or adjusting flow through rubber or plastic tubing |
Uses of the Hoffman screw clip
In laboratory set-ups the Hoffman clip is placed on a rubber delivery tube and tightened to stop the flow, or opened a little at a time to control it, which is useful wherever a tap or stopcock is not fitted to the apparatus.
- Controlling gas flow from gas-generation apparatus through rubber delivery tubes
- Closing tubing outlets on aspirator bottles and siphons
- Adjusting liquid flow through rubber tubing in simple distillation and filtration set-ups
Scope of supply and ordering
The listing covers copper Hoffman screw clips. Tubing, stoppers and the apparatus they are used with are separate items, and accessories, spares and quantities are confirmed on the quotation.
MOQ, lead time and packing are confirmed on each quotation according to the number of clips and the delivery destination. Laboratory store quantities and bulk kit orders for schools and colleges are supplied, including export orders to Africa, the Middle East and South and South-East Asia.
Frequently asked questions
What is the Hoffman screw made of?
It is made of copper.
What is a Hoffman screw used for?
It clamps rubber or plastic tubing so that the flow through it can be shut off or adjusted by turning the screw.
Which tubing sizes does it fit?
The tubing range is not stated in the product data; tell us the outside diameter of your tubing and the size is confirmed on the quotation.
Related products
More clamps and fittings are listed in Chemistry Equipment, part of the full chemistry lab equipment range.
Request a quote
To order Hoffman screws, send the quantity, tubing size and delivery destination through the JaincoLab contact page or email [email protected]. For tender or project supply, see our tenders page.
