Kimax USA 50ml Ungraduated Round Bottom Glass Centrifuge Tubes Lot of 17

Kimax USA 50ml Ungraduated Round Bottom Glass Centrifuge Tubes Lot of 17

This lot includes 17 Kimax USA 50ml ungraduated round-bottom glass centrifuge tubes, stored in their original divided cardboard box. Each tube features an etched hexagonal capacity indicator, a clearly legible 50ml volume designation, and the Kimax USA brand mark. The tubes are ungraduated — meaning they carry no intermediate volume graduations along the body — and have a round (not conical) bottom profile suited to specific centrifuge rotor configurations.

Specifications & What's Included

• Brand: Kimax USA
• NSN / Part Number: 6640-111-4000
• Tube style: Round bottom, ungraduated
• Capacity: 50 mL per tube
• Material: Borosilicate glass
• Quantity: 17 tubes
• Packaging: Original divided cardboard storage box
• Military surplus contract: DSA120-73-C-4485 (dated 10/1973)

Applications

Kimax borosilicate glass centrifuge tubes are standard laboratory glassware used in clinical, research, and industrial centrifugation. Round-bottom ungraduated tubes like these are used when precise intermediate volume readings are not required — common applications include pelleting precipitates, separating immiscible liquids, and collecting sediment from biological or chemical samples. Kimax is a long-established brand of laboratory glass, produced by Kimble Glass (later Kimble Chase, now DWK Life Sciences), and their borosilicate formulation offers good chemical resistance and thermal stability. This particular lot carries a 1973 military surplus procurement date, making it a vintage stock find — the tubes remain fully functional for their intended laboratory use. They are compatible with centrifuge rotors designed for round-bottom tubes in the 50ml size class.