Lab Glassware · Flasks

Flat Bottom Flask

Available sizes: 25–20000 ml

2 variants and 22 sizes listed below with dimensions, joint sizes and tolerances, as per the manufacturer's current catalogue. Borosilicate 3.3 glass, supplied with COA on request. Prices are by quotation — tell us the sizes and quantities you need.

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Flat Bottom Flask — Narrow Mouth Flat Bottom Flask — Narrow Mouth, Short Neck With I/C Joint

Flat Bottom Flask

Narrow Mouth

Complies with IS 1381 (Part - I), ISO 1773 with ISI Mark
Uniform wall thickness distribution makes these flasks ideal for heating
All sizes have a durable matt-finished enamelled area for marking

Capacity (ml)	Approx. O.D. × Height (mm)	Approx. Neck O.D. (mm)
25*	42 × 90	20
50	51 × 90	26
100	64 × 105	26
150*	75 × 132	28
250	85 × 138	34
300*#	88 × 160	24
500	105 × 163	34
1000	131 × 190	42
2000	166 × 230	50
3000*	186 × 300	50
5000*	224 × 320	58
6000	236 × 315	65
10000	279 × 360	65
10000	279 × 390	65
20000*	350 × 495	78

* Not covered in standards
# Suitable for use in Polenske Apparatus

Flat Bottom Flask

Narrow Mouth, Short Neck With I/C Joint

Uniform wall thickness distribution makes these Flasks ideal for heating
All sizes have a durable matt-finished enamelled area for marking
Equipped with interchangeable joint
The flat base ensures that the Flask can be placed down even without the supporting ring