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Grainger offers a wide selection of thumb caps and bottle closures made of a variety of materials in assorted shapes and sizes. Find LDPE thumb caps that can resist most acids, alcohols, bases and esters to help tightly and safely seal glass test tubes. Choose the type of liner materials you need in screw-on phenolic caps to seal and reseal glass specimen bottles and other containers. Check out a huge variety of cap and closure types that can fit a wide range of neck sizes. Shop Grainger for thumb caps and bottle closures today!

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Cap: 18-425 mm Labware Screw Closure Size, Polypropylene, PTFE/Rubber, Flat, 100 PK

Cap, 5mm: Unlined, Push In, 100 PK

Closure: 8-425 mm Labware Screw Closure Size, Polypropylene, Unlined, 1,000 PK

Cap: 10-400 mm Labware Screw Closure Size, PTFE, PTFE/Silicone, Flat, 100 PK

Snap Cap: Polyethylene, Snap On, Green, 1,000 PK

Closure: 70-400 mm Labware Screw Closure Size, Polypropylene, F217, Flat, Screw On, 144 PK

Closure: 38-430 mm Labware Screw Closure Size, PTFE, PTFE, Flat, 500 PK

Stopcock Plug: 6 Stopper Size, PTFE, White

Dropper Tip Cap: Polypropylene, Unlined, Dropper, White Clear, 1,000 PK

Closure: 63-400 mm Labware Screw Closure Size, PTFE, PTFE, Flat, 144 PK

Flange Cap: Polyethylene, Stopper, Red, 1,000 PK

Beaker Lid: 44-61 mm/66-79 mm/84-100 mm Labware Screw Closure Size, Silicone, Unlined, 3 PK

Stopper: 25 mm Neck Size, Rubber, Black, 58 mm Bottom Dia., 5 PK

Septum Stopper: White, 100 PK

Stopper #16: PTFE

Flange Cap: Polyethylene, Stopper, Blue, 1,000 PK

Stopper: 25 mm Neck Size, Rubber, Black, 26 mm Bottom Dia., 20 PK

Cap: 24-400 mm Labware Screw Closure Size, Phenolic, Tin Foil, Solid, 144 PK

Cap: 38-400 mm Labware Screw Closure Size, Phenolic, LDPE, Solid, Screw On, 144 PK

Phenolic Cap: 70-400 mm Labware Screw Closure Size, Phenolic, Polyethylene, Solid, 144 PK

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