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Flask Closures

Each with its own specific application and fit, a variety of closures are available for use with flasks. Most common flask closures include screw caps and snap caps. Flask closures are typically manufactured from autoclavable plastics such as polyethylene or polypropylene. A wide range of flask closure types are available to accommodate a broad range of laboratory applications and flask varieties, including closures that are sterile or non-sterile, disposable or reusable, and vented or unvented. Vented flask closures commonly include a 0.2 µm filter membrane to prevent contamination of flask contents. For applications that require a tight seal, screw caps with plug seals are available.
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1 – 15 of 128 results
1
Promotions Available

Corning™ Universal CellSTACK™ Caps
BIOPHARMA GREENER_CHOICE

For filling, venting, and manipulation

EDGE
2
Promotions Available

Corning™ PYREX™ Polypropylene Flask Closures
GSA_VA

Designed for culture tubes and flasks with long rimless necks

Disposable Reusable
Product Type Cap, Flask
For Use With (Equipment) Culture tubes and flasks with long ri mLess necks
No. per Case 100/Cs.
No. per Pack 50/Pk.
Autoclavable Autoclavable
Sterility Non-sterile
Closure Material Polypropylene
3
Promotions Available

Corning™ PYREX™ Polyethylene Snap Caps for Volumetric Flasks
GSA_VA GREENER_CHOICE

Economical closure for some volumetric flasks

EDGE
Disposable Reusable
Product Type Cap, Snap
For Use With (Equipment) For volumetric flasks
Color Blue
No. per Case 6/Cs.
Closure Color Blue
Closure Type Snap Cap
Closure Material HDPE
4
Promotions Available

Corning™ PYREX™ GL45 Screw Cap with Plug Seal
BIOPHARMA GSA_VA GREENER_CHOICE

Nonsterile, reusable caps

Disposable Reusable
Product Type Cap
For Use With (Equipment) Graduated Erlenmeyer flasks and media bottles
Thread Size GL 45
Autoclavable Autoclavable
Sterility Non-sterile
5
Promotions Available

Corning™ 33mm Caps
BIOPHARMA GREENER_CHOICE

Solid or vented

EDGE
6

Fisherbrand™ Flask Covers
SDP

Fisherbrand™ Flask Covers help cut down on evaporation by causing condensation and refluxing when placed in flask necks during boiling. Made from flint glass and designed by Professor F.E. Tuttle, they fit any flask accepting the listed rubber stopper sizes.

Product Type Cover, Flask
For Use With (Equipment) Use with flask that takes Rubber stopper sizes, used when solutions are being boiled to cause condensation and refluxing
Material Glass
Closure Material Flint Glass
7

DWK Life Sciences KIMBLE™ Polyethylene Snap Caps
SDP

KIMBLE™ Polyethylene Snap Caps provide a tight, secure fit to help prevent leakage or evaporation. Constructed of durable yellow polyethylene, these snap caps are available in multiple sizes to fit a range of Erlenmeyer flasks.

Product Type Cap, Snap
Closure Color Yellow
Closure Material Polyethylene
8
Promotions Available

Corning™ Universal CellSTACK™ Caps
BIOPHARMA GREENER_CHOICE

For filling, venting, and manipulation

9
Promotions Available

PYREX™ Polypropylene Caps for Erlenmeyer Flasks
BIOPHARMA GSA_VA GREENER_CHOICE

As supplied with Pyrex™ Brand Media/Solution bottles. Choose orange caps for temperatures to 140°C (284°F), red caps for temperatures to 180°C (356°F).

Disposable Single-use
Product Type Cap
Temperature Range (English) 284°F
Closure Color Orange
Temperature Range (Metric) 140°C
Sterility Sterile
Closure Material Polypropylene
10
Promotions Available

Corning™ Sterile Disposable Spinner Flask Vent Cap
BIOPHARMA GSA_VA GREENER_CHOICE

Designed to fit Corning 500mL, 1L and 3L disposable spinner flasks.

11

Thermo Scientific™ Nalgene™ Vented HDPE Closures for Sterile Single Use Erlenmeyer Flasks

Ensure a sterile gas exchange for shaker and suspension cell culture by using Thermo Scientific™ Nalgene™ Vented HDPE Closures for Sterile Single Use Erlenmeyer Flasks.

Color Blue
No. per Case 12/Cs.
Material HDPE
No. per Pack 1 Ea.
Closure Type Vented
Sterility Sterile
12

Thermo Scientific™ Caps for Nunclon™ Delta Flasks

Protect your valuable cell culture samples. These caps for Thermo Scientific™ Nunclon™ Delta Flasks are offered in two styles—vent/close, filter—to meet application needs.

Surface Treatment Nunclon Delta
No. per Case 100
Material HDPE
No. per Pack 1
Closure Color Blue
Sterility Sterile
13
Promotions Available

Corning™ Universal CellSTACK™ Caps
BIOPHARMA GREENER_CHOICE

For filling, venting, and manipulation

EDGE
Disposable Single-use
Product Type Cap, Filling
Closure Color Orange
Sterility Sterile
Closure Material HDPE
Diameter (Metric) Outer Neck 3.3 cm
14

Falcon™ Vented Screw Caps for Flasks, Sterile
GREENER_CHOICE

Designed for use with Falcon 25-, 75-, and 175cm2 flasks

EDGE
Includes 0.2μm Membrane vent
Product Type Cap, Vented
Color Blue
Closure Type Screw Cap
Sterility Sterile
Closure Material Polyethylene
15
Promotions Available

Thermo Scientific™ Nunc™ Sterile Flask Replacement Filter Caps

Allow constant airflow and minimize chance of contamination by using individually packed Thermo Scientific™ Nunc™ Sterile Flask Replacement Filter Caps.

No. per Case 100/Cs.
Closure Color White
Closure Type Filter
Sterility Sterile