Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
UNITED SCIENTIFIC SUPPLIES Neoprene Stopper, Size 6-1/2, Green - Rubber Stoppers

UNITED SCIENTIFIC SUPPLIES Neoprene Stopper, Size 6-1/2, Green

The UNITED SCIENTIFIC SUPPLIES Stopper: Neoprene is a rubber stopper with a 6-1/2 stopper size, featuring a 27 mm bottom diameter, 34 mm top diameter, and 25 mm overall height. Made from green neoprene, this product…

SKU 3G-OTH-381398

Also listed as: NST6AS · NST6A S

Brand
UNITED SCIENTIFIC SUPPLIES
Item
Neoprene Stopper, Size 6-1/2, Green
Category
Rubber Stoppers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

UNITED SCIENTIFIC SUPPLIES
Manufacturer Part Number
NST6A-S
Type
Green
Material
Neoprene
Color
Green
Top Dia
34 mm
Bottom Dia
27 mm
Overall Ht
25 mm
Stopper Size
6-1/2

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

UNITED SCIENTIFIC SUPPLIES Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The UNITED SCIENTIFIC SUPPLIES Stopper: Neoprene is a rubber stopper with a 6-1/2 stopper size, featuring a 27 mm bottom diameter, 34 mm top diameter, and 25 mm overall height. Made from green neoprene, this product is identified by manufacturer part number NST6A-S.

Frequently Asked Questions

What is the UNITED SCIENTIFIC SUPPLIES neoprene stopper used for?

This green neoprene stopper is used to seal laboratory glassware such as flasks, test tubes, and bottles. It provides a tight, chemical-resistant closure for applications in chemistry, biology, and industrial testing environments.

What are the specifications of the UNITED SCIENTIFIC SUPPLIES stopper NST6A-S?

The stopper has a 6-1/2 stopper size, 27 mm bottom diameter, 34 mm top diameter, and 25 mm overall height. It is made of green neoprene by UNITED SCIENTIFIC SUPPLIES INC, with manufacturer part number NST6A-S.

Where to buy the UNITED SCIENTIFIC SUPPLIES stopper NST6A-S worldwide?

3G Electric supplies the UNITED SCIENTIFIC SUPPLIES neoprene stopper NST6A-S worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us to source this product for your laboratory needs.

How to select the right neoprene stopper size for a flask?

Measure the inner diameter of your flask neck. The stopper's bottom diameter (27 mm for this model) should match the neck opening snugly. Neoprene offers good chemical resistance and flexibility, making it suitable for general lab use.

UNITED SCIENTIFIC SUPPLIES Products

3G Electric supplies UNITED SCIENTIFIC SUPPLIES rubber stoppers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
Stopper: Neoprene, 5 Stopper Size, 23 mm Bottom Dia, 27 mm Top Dia, 25 mm Overall Ht, Green, 0 Holes (MPN NST5-S)
UNITED SCIENTIFIC SUPPLIES
Stopper: Neoprene, 5 Stopper Size, 23 mm Bottom Dia, 27 mm Top Dia, 25 mm Overall Ht, Green, 0 Holes (MPN NST5-S)
Stopper: Neoprene, 6 Stopper Size, 26 mm Bottom Dia, 32 mm Top Dia, 25 mm Overall Ht, Green, 0 Holes (MPN NST6-S)
UNITED SCIENTIFIC SUPPLIES
Stopper: Neoprene, 6 Stopper Size, 26 mm Bottom Dia, 32 mm Top Dia, 25 mm Overall Ht, Green, 0 Holes (MPN NST6-S)
Stopper: Neoprene, 10 1/2 Stopper Size, 45 mm Bottom Dia, 53 mm Top Dia, 25 mm Overall Ht, Green (MPN NST10A-S)
UNITED SCIENTIFIC SUPPLIES
Stopper: Neoprene, 10 1/2 Stopper Size, 45 mm Bottom Dia, 53 mm Top Dia, 25 mm Overall Ht, Green (MPN NST10A-S)
Solid neoprene stopper in Size 7, green color, with a top diameter of 37 mm, bottom diameter of 30 mm, and overall height of 25 mm. Designed for sealing laboratory containers such as flasks and test tubes, providing an airtight closure to prevent contamination or evaporation
UNITED SCIENTIFIC SUPPLIES
Solid neoprene stopper in Size 7, green color, with a top diameter of 37 mm, bottom diameter of 30 mm, and overall height of 25 mm. Designed for sealing laboratory containers such as flasks and test tubes, providing an airtight closure to prevent contamination or evaporation
This green neoprene stopper, size 9, has a top diameter of 45 mm, bottom diameter of 37 mm, and overall height of 25 mm. It is solid with no holes, suitable for sealing laboratory flasks, test tubes, and other glassware
UNITED SCIENTIFIC SUPPLIES
This green neoprene stopper, size 9, has a top diameter of 45 mm, bottom diameter of 37 mm, and overall height of 25 mm. It is solid with no holes, suitable for sealing laboratory flasks, test tubes, and other glassware
Green neoprene rubber stopper, size 10, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles, providing a flexible and chemical-resistant closure for mixing, storing, or transporting samples
UNITED SCIENTIFIC SUPPLIES
Green neoprene rubber stopper, size 10, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles, providing a flexible and chemical-resistant closure for mixing, storing, or transporting samples

More from UNITED SCIENTIFIC SUPPLIES

View all UNITED SCIENTIFIC SUPPLIES parts →
Black rubber stopper, size 9, with 45 mm top diameter, 37 mm bottom diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, or bottles in general lab applications
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 9, with 45 mm top diameter, 37 mm bottom diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, or bottles in general lab applications
Black rubber stopper, Size 4, with 20 mm bottom diameter, 26 mm top diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, Size 4, with 20 mm bottom diameter, 26 mm top diameter, and 25 mm overall height. Features 2 holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
Black rubber stopper, size 10, with 2 holes. Top diameter 53 mm, bottom diameter 45 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage. The two holes allow insertion of tubing or thermometers for controlled setups
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 10, with 2 holes. Top diameter 53 mm, bottom diameter 45 mm, overall height 25 mm. Used to seal laboratory flasks, test tubes, and glassware, preventing contamination and gas leakage. The two holes allow insertion of tubing or thermometers for controlled setups
Black rubber stopper, size 10-1/2, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles to prevent leaks and contamination during mixing, storage, or transport of chemicals and samples
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 10-1/2, with a top diameter of 50 mm, bottom diameter of 42 mm, and overall height of 25 mm. Used to seal laboratory glassware such as flasks, test tubes, and bottles to prevent leaks and contamination during mixing, storage, or transport of chemicals and samples
This solid neoprene stopper, size 3, is used to seal laboratory glassware such as flasks, test tubes, and bottles. It features a top diameter of 24 mm, bottom diameter of 18 mm, and overall height of 25 mm. The green neoprene material provides resistance to oils, solvents, and moderate temperatures for general lab applications
UNITED SCIENTIFIC SUPPLIES
This solid neoprene stopper, size 3, is used to seal laboratory glassware such as flasks, test tubes, and bottles. It features a top diameter of 24 mm, bottom diameter of 18 mm, and overall height of 25 mm. The green neoprene material provides resistance to oils, solvents, and moderate temperatures for general lab applications
Green neoprene rubber stopper, size 13, with a top diameter of 68 mm, bottom diameter of 58 mm, and overall height of 25 mm. Used to seal laboratory flasks, test tubes, and other glassware for mixing, storing, or transporting samples
UNITED SCIENTIFIC SUPPLIES
Green neoprene rubber stopper, size 13, with a top diameter of 68 mm, bottom diameter of 58 mm, and overall height of 25 mm. Used to seal laboratory flasks, test tubes, and other glassware for mixing, storing, or transporting samples
Black rubber stopper, size 5, with a top diameter of 27 mm, bottom diameter of 23 mm, and overall height of 25 mm. Features two holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 5, with a top diameter of 27 mm, bottom diameter of 23 mm, and overall height of 25 mm. Features two holes for inserting tubing or probes. Used to seal laboratory flasks, test tubes, and glassware in general lab applications
Black rubber stopper, size 11-1/2, with top diameter 63 mm, bottom diameter 50 mm, and overall height 25 mm. Used for sealing laboratory containers such as flasks, test tubes, and bottles to prevent contamination, evaporation, or spillage
UNITED SCIENTIFIC SUPPLIES
Black rubber stopper, size 11-1/2, with top diameter 63 mm, bottom diameter 50 mm, and overall height 25 mm. Used for sealing laboratory containers such as flasks, test tubes, and bottles to prevent contamination, evaporation, or spillage