Screw Caps, Stoppers and Stopcocks Manufacturer, Suppliers and Exporter in India
Jaincolab Manufacturers is leading Screw Caps, Stoppers and Stopcocks Manufacturer,and supplier and Exporter in India, Algeria (Algiers), Angola (Luanda), Argentina (Buenos Aires), Armenia (Yerevan), Australia(Canberra), Austria (Vienna), Bahrain (Manama), Bangladesh (Dhaka), Bhutan (Thimphu), Bolivia (Sucre), Botswana (Gaborone), Brazil (Brasília), Brunei (Bandar Seri Begawan), Montenegro (Podgorica), Morocco (Rabat), Mozambique (Maputo), Myanmar (Naypyidaw), Namibia (Windhoek), Nepal (Kathmandu), New Zealand (Wellington), Nigeria (Abuja), Oman (Muscat), Palestine (Ramallah), Panama (Panama City), Papua New Guinea (Port Moresby), Paraguay (Asunción), Peru (Lima), Philippines (Manila)¸ Portugal (Lisbon), Qatar (Doha), Rwanda (Kigali), Saudi Arabia (Riyadh), Senegal (Dakar), Serbia (Belgrade), Sierra Leone (Freetown), Slovakia (Bratislava), South Africa (Cape Town) (Pretoria) (Bloemfontein), South Sudan (Juba), Spain (Madrid), Sri Lanka (Sri Jayawardenepura Kotte) (Colombo), Sudan (Khartoum), Syria (Damascus), Tanzania (Dodoma), Thailand (Bangkok), Togo (Lomé), Tonga (Nuku'alofa), Trinidad and Tobago (Port of Spain), Tunisia (Tunis), Turkey (Ankara), Turkmenistan (Ashgabat), Uganda (Kampala), United Arab Emirates (Abu Dhabi), United Kingdom (London), United States (Washington, D.C.)
JaincoLab, the laboratory equipment brand of Jain Scientific Suppliers (Ambala, Haryana, established 1982), manufactures and exports screw caps, stoppers and stopcocks for school, college, university and research laboratories, supplying PTFE-key and glass-key stopcocks, burette stopcocks, valve-type stopcocks and closures for glass apparatus.
Last updated: September 2026.
Jain Scientific Suppliers holds ISO 9001:2015 (quality management) and ISO 14001:2015 (environmental management) certification for its manufacturing operations.
What are Screw Caps, Stoppers and Stopcocks?
This range covers the caps, rubber rings, closures and flow-control stopcocks used to seal and regulate flow on laboratory glassware. JaincoLab's Screw Caps, Stoppers and Stopcocks range includes straight-through, valve-type, double-oblique, T-bore and high-vacuum stopcocks in borosilicate glass with either PTFE or glass keys, together with plastic caps, PTFE washers and cap fittings, for use with burettes, separating funnels and other Lab Glassware.
Selected Screw Caps, Stoppers and Stopcocks — Model Numbers and Specifications
| Product | Product Code | Published specification |
|---|---|---|
| Burette Stopcocks, PTFE Key, Straight Through | JA-SCSAS-1658 | Borosilicate glass barrel with self-lubricating PTFE key (no stopcock grease needed); interchangeable keys with plastic screw-thread retaining device; 1:10 taper for performance and ease of operation |
Other listed items in this range include Plastic Cap (JA-SCSAS-1651), PTFE Washer (JA-SCSAS-1652), Rubber Ring (JA-SCSAS-1653), Cap Fittings (JA-SCSAS-1654), Stopcocks, Glass Key, Straight Through (JA-SCSAS-1657), Burette Stopcocks, Glass Key, Straight Through (JA-SCSAS-1659), Valve Type Stopcocks (JA-SCSAS-1660/1661), Double Oblique Stopcocks (JA-SCSAS-1662/1663), T Bore Stopcocks (JA-SCSAS-1664/1665) and High Vacuum Stopcocks (JA-SCSAS-1666/1668) — full dimensional specifications for these are available on request as part of a quotation.
Applications
| Setting | Typical use |
|---|---|
| School / College Chemistry Lab | Flow control on burettes and separating funnels during titration and extraction |
| Research Laboratory | High-vacuum and valve-type stopcocks for controlled gas and liquid transfer |
| General Bench Work | Sealing flasks and bottles with caps, stoppers and washers |
Why Choose JaincoLab
JaincoLab is a direct manufacturer, not a reseller, supplying institutional and tender buyers across India and internationally. Screw Caps, Stoppers and Stopcocks sit within JaincoLab's wider Lab Glassware range, alongside Screwthreads, Discs and Joints and Beakers and Flasks. Schools, colleges and institutions buying on tender or in bulk can review JaincoLab's tender and bulk-order support.
Frequently Asked Questions
Q: What information does JaincoLab need to prepare a quotation for stopcocks or closures?
A: The product or model code, key type (PTFE or glass) and bore pattern, the quantity you need, and your delivery destination. Quotations are usually issued within 1-2 business days and are typically valid for 15-30 days.
Q: Does JaincoLab supply this range against school, government or institutional tenders?
A: Yes — see JaincoLab's tender and bulk-order support page for institutional and government procurement.
Q: What are the delivery timelines and packing arrangements for these orders?
A: Standard items are typically delivered within 3-7 business days inside India, with 10-15 working days for bulk or special orders. Glass stopcocks and closures are fragile and are packed with protective cushioning, with export consignments using customs-ready packaging.
Q: How is Screw Caps, Stoppers and Stopcocks different from Screwthreads, Discs and Joints?
A: Screw Caps, Stoppers and Stopcocks covers closures and flow-control valves such as burette and vacuum stopcocks, while Screwthreads, Discs and Joints covers the ground-glass spherical, cone and socket joints used to connect apparatus together.
Q: Does JaincoLab hold quality or environmental certification for its glassware manufacturing?
A: Yes, Jain Scientific Suppliers holds ISO 9001:2015 (quality management) and ISO 14001:2015 (environmental management) certification for its manufacturing operations.
Q: Can JaincoLab provide detailed technical specifications before I order?
A: Yes, model-specific specifications can be confirmed as part of the quotation process. Not every item currently has a downloadable datasheet published on the website, so confirm current specifications directly with JaincoLab before finalising an order.
Request a Quote
For pricing, bulk orders or technical questions on JaincoLab's stopcock and closure range, contact our team with your item list, quantities and delivery destination.
Plastic Cap
Product Code : JA-SCSAS-1651
Plastic cap fitting from the JaincoLab screw cap, stopper and stopcock range, product code JA-SCSAS-1651, for closing or completing threaded laboratory glassware and adapters. Thread size and quantity are confirmed on the quotation.
Note: Plastic cap fitting from the screw cap, stopper and stopcock range. Give the thread size of your glassware when ordering.
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PTFE Washer
Product Code : JA-SCSAS-1652
PTFE washers for screw caps and threaded laboratory glassware, product code JA-SCSAS-1652, supplied against eight reference codes: QW13/6, QW18/7, QW24/6, QW24/9, QW24/11, QW28/6, QW28/11 and QW28/18.
Note: PTFE washers supplied against reference codes QW13/6 to QW28/18. Quote the reference code for each line.
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Rubber Ring
Product Code : JA-SCSAS-1653
Rubber ring from the JaincoLab screw cap, stopper and stopcock range, product code JA-SCSAS-1653, available in white, black and red, for use with screw caps and glassware fittings. Size and quantity are confirmed on the quotation.
Note: Rubber ring available in white, black and red. State the colour, size and quantity when ordering.
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Cap Fittings
Product Code : JA-SCSAS-1654
Cap fittings for the JaincoLab screw cap and stopper range, product code JA-SCSAS-1654, covering C-cap, connector and ring or washer fittings. Types, sizes and quantities are confirmed on the quotation.
Note: Cap fittings covering C-cap, connector and ring or washer fittings for the screw cap and stopper range.
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Stopcocks, PTFE Key, Straight Through
Product Code : JA-SCSAS-1656
Straight-through stopcocks with a PTFE key, product code JA-SCSAS-1656, listed in bore sizes of 2, 4, 6, 8 and 10 mm, used to control the flow of liquids or gases in laboratory glassware set-ups.
Note: Straight-through PTFE key stopcocks in 2, 4, 6, 8 and 10 mm bore sizes.
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Stopcocks, Glass Key, Straight Through
Product Code : JA-SCSAS-1657
Straight-through stopcocks with a glass key, product code JA-SCSAS-1657, listed in bore sizes of 2, 4, 6, 8 and 10 mm, used to control the flow of liquids or gases in laboratory glassware set-ups.
Note: Straight-through glass key stopcocks in 2, 4, 6, 8 and 10 mm bore sizes.
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Burette Stopcocks, PTFE Key, Straight Through
Product Code : JA-SCSAS-1658
Straight-through burette stopcocks in borosilicate glass with PTFE keys, product code JA-SCSAS-1658. The barrels are highly polished and the PTFE keys are self-lubricating, so no stopcock grease is needed.
Note: Burette stopcocks with borosilicate glass barrel and self-lubricating PTFE key, no grease needed.
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Burette Stopcocks, Glass Key, Straight Through
Product Code : JA-SCSAS-1659
Straight-through burette stopcocks with a glass key and a 2 mm bore, product code JA-SCSAS-1659, used to control the flow of liquid from a burette and supplied for burette assembly and repair.
Note: Straight-through glass key burette stopcocks with a 2 mm bore.
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Valve Type Stopcocks, PTFE Key
Product Code : JA-SCSAS-1660
Valve type stopcocks with a PTFE key, product code JA-SCSAS-1660, listed in 2 mm and 4 mm bore sizes, used to control the flow of liquids or gases in laboratory glassware set-ups.
Note: Valve type stopcocks with PTFE key in 2 mm and 4 mm bore sizes.
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Valve Type Stopcocks, PTFE Key, Right Angle
Product Code : JA-SCSAS-1661
Right angle valve type stopcocks with a PTFE key, product code JA-SCSAS-1661, listed in 2 mm and 4 mm bore sizes, used to control liquid or gas flow where a glass line turns through a right angle.
Note: Right angle valve type stopcocks with PTFE key in 2 mm and 4 mm bore sizes.
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Double Oblique Stopcocks, Borosilicate Glass, PTFE Key
Product Code : JA-SCSAS-1662
Double oblique stopcocks in borosilicate glass with a PTFE key, product code JA-SCSAS-1662, listed in 2 mm and 4 mm bore sizes, for switching an outlet between two lines on glass manifolds and apparatus.
Note: Double oblique borosilicate glass stopcocks with PTFE key in 2 mm and 4 mm bore sizes.
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Double Oblique Stopcocks, Borosilicate Glass, Glass Key
Product Code : JA-SCSAS-1663
Double oblique stopcocks in borosilicate glass with a glass key, product code JA-SCSAS-1663, listed in 2 mm and 4 mm bore sizes, for switching an outlet between two lines on all-glass manifolds and apparatus.
Note: Double oblique borosilicate glass stopcocks with glass key in 2 mm and 4 mm bore sizes.
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T Bore Stopcocks, Borosilicate Glass, PTFE Key
Product Code : JA-SCSAS-1664
T bore stopcocks in borosilicate glass with a PTFE key, product code JA-SCSAS-1664, listed in 2 mm and 4 mm bore sizes, for three-way control of liquid or gas flow in laboratory glassware set-ups.
Note: T bore borosilicate glass stopcocks with PTFE key in 2 mm and 4 mm bore sizes.
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T Bore Stopcocks, Borosilicate Glass, Glass Key
Product Code : JA-SCSAS-1665
T bore stopcocks in borosilicate glass with a glass key, product code JA-SCSAS-1665, listed in 2 mm and 4 mm bore sizes, for three-way control of liquid or gas flow in all-glass apparatus.
Note: T bore borosilicate glass stopcocks with glass key in 2 mm and 4 mm bore sizes.
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High Vacuum Stopcocks, Straight Through, Borosilicate Glass
Product Code : JA-SCSAS-1666
Straight-through high vacuum stopcocks in borosilicate glass, product code JA-SCSAS-1666, fitted with a glass key and a key-retaining device for secure, long-term use, listed in 2 mm and 4 mm bore sizes.
Note: Straight-through high vacuum borosilicate glass stopcocks with glass key and key retainer, 2 mm and 4 mm bores.
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High Vacuum Stopcocks, Double Oblique, Borosilicate Glass
Product Code : JA-SCSAS-1668
High vacuum double oblique stopcocks in borosilicate glass, product code JA-SCSAS-1668, fitted with a glass key for secure operation and listed in 2 mm and 4 mm bore sizes, for switching lines on vacuum manifolds.
Note: High vacuum double oblique borosilicate glass stopcocks with glass key, 2 mm and 4 mm bores.
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