Brass Slotted Grub Screws – Manufacturer, Supplier & Exporter | Conex India

Conex Screws and Fasteners is a premier manufacturer and exporter of Brass Slotted Grub Screws (also known as Brass Slotted Set Screws or Brass Headless Slotted Screws) from Jamnagar, India. With over three decades of fastener manufacturing experience, we supply precision brass slotted grub screws to customers across the USA, UK, Europe, Australia, Canada, Germany, and the Middle East. Our brass slotted grub screws are widely recognised for their excellent corrosion resistance, golden aesthetic appeal, ease of installation with a flat-head screwdriver, and suitability in applications where spark-free, non-magnetic performance is required.

What Are Brass Slotted Grub Screws?

Brass Slotted Grub Screws are fully threaded, headless fasteners driven by a flat-blade (slotted) screwdriver. Unlike socket (Allen key) grub screws, slotted grub screws are tightened using a standard flathead screwdriver – making them ideal for applications where Allen keys may not be practical or where tool accessibility is limited. They are used to secure gears, pulleys, sprockets, and rotating components on shafts, as well as in plumbing valve packing glands, electrical junction box terminals, and decorative hardware.

What Is Brass?

Brass is a copper-zinc alloy offering excellent corrosion resistance, good machinability, and an attractive golden appearance. Common brass alloys for fasteners include CZ121 (Free Machining Brass, 60% Cu / 38% Zn / 2% Pb) and CZ112 (Naval Brass, 60% Cu / 39% Zn / 1% Sn). Brass fasteners are non-magnetic, non-sparking, and electrically conductive, making them ideal for electrical, plumbing, and decorative applications.

Material Grades & International Equivalents

Size & Dimensional Chart – Metric Slotted Grub Screws (DIN 551 / ISO 4766)

Size & Dimensional Chart – Inch UNC Slotted Grub Screws

Key Features & Performance Metrics

• Drive Type: Flat-blade (slotted) screwdriver – no special tools required
• Material: CZ121 / C36000 Free Machining Brass (standard); Naval Brass or other alloys on request
• Tensile Strength: 350–450 MPa
• Hardness: 60–80 HRB
• Corrosion Resistance: Excellent in atmospheric, freshwater, and mild chemical environments
• Non-Magnetic: Suitable for electrical and electronic applications
• Non-Sparking: Safe for use in potentially explosive environments
• Electrical Conductivity: ~28% IACS – good for grounding and bonding applications
• Thread Forms: Metric (ISO), UNC, UNF, BSW, BSF available
• Point Styles: Flat point (DIN 551), cup point (DIN 553), oval point (DIN 554), cone point (DIN 914 equivalent)

Applications

Brass Slotted Grub Screws are used across a wide range of industries and applications including shaft and collar locking in light machinery, plumbing valve packing glands and compression fittings, electrical junction boxes and terminal blocks, decorative hardware and furniture fittings, gas valve and meter assemblies, precision instruments and gauges, optical equipment and camera mounts, model engineering and hobby applications, and food and beverage equipment where non-magnetic fasteners are required.

Why Choose Conex Over Other Manufacturers?

• 30+ Years of Experience: Three decades of precision brass fastener manufacturing from Jamnagar, India – the global hub for brass components
• Faster Turnaround: Standard sizes dispatched within 7–14 working days from our Jamnagar facility
• Superior Customer Support: Dedicated account managers providing responsive, personalised service
• Excellent Communication: English-fluent team with prompt RFQ responses, technical guidance, and proactive order updates
• Global Exposure: Regular exporters to USA, UK, Germany, Australia, Canada, UAE, and 50+ countries worldwide
• Competitive Pricing: Direct factory pricing – no middlemen or trading margins
• Quality Assurance: ISO-certified manufacturing with full material traceability and dimensional inspection
• Custom Capability: Non-standard sizes, special thread forms, custom packaging, and private labelling available

Our Flexibility to Customise

Conex manufactures brass slotted grub screws in custom thread forms (Metric, UNC, UNF, BSW, BSF, Metric Fine), non-standard diameters and lengths, special point styles, and with custom surface treatments including nickel plating, tin plating, and chrome plating. We can work from customer drawings and specifications. Both small sample quantities and large production volumes are accommodated with flexible MOQs.

What Separates Conex from Other Manufacturers

Jamnagar (India) is the world’s largest brass parts manufacturing hub, and Conex is among the most established exporters in this region with over 30 years of global export experience. Unlike traders, we are a direct manufacturer with full in-house cold forging, thread rolling, slotting, and finishing capabilities. We provide complete documentation packages including material test certificates, dimensional inspection reports, RoHS declarations, and REACH compliance statements. Our export team has extensive experience handling all major international trade terms and shipping requirements.

Export-Worthy Packaging

• Inner: Polybags sealed and sorted by size, length, and specification
• Outer: Double-wall corrugated export cartons rated for international freight
• Labelling: Full identification on every carton – part number, material grade, size, quantity, batch number, and country of origin
• Moisture protection: Silica gel desiccant packs for sea freight and humid climate shipments
• Palletisation: ISPM-15 compliant heat-treated wooden pallets available for FCL shipments

Technical Q&A – Brass Slotted Grub Screws

Q1. What is a brass slotted grub screw?
A: A brass slotted grub screw is a fully threaded, headless fastener made from brass alloy, driven by a flat-blade (slotted) screwdriver. It is used to secure components such as gears, collars, and pulleys onto shafts, or to act as a pressure/locking element in valve assemblies, without protruding above the mating surface.

Q2. What is the difference between a slotted grub screw and a socket grub screw?
A: A slotted grub screw is driven by a standard flat-blade screwdriver, making it accessible with common tools in the field. A socket grub screw (Allen set screw) requires a hex key (Allen key) and allows higher tightening torque. Slotted types are preferred in applications requiring frequent adjustment or where Allen keys are impractical.

Q3. What brass grade is used for slotted grub screws?
A: The standard grade is CZ121 / C36000 Free Machining Brass (CuZn39Pb3), which offers excellent machinability for the slotting operation and good corrosion resistance. For marine or higher-strength applications, CZ112 Naval Brass or CZ131 Engraving Brass can be supplied on request.

Q4. What standards do your brass slotted grub screws conform to?
A: Our brass slotted grub screws with flat point conform to DIN 551 / ISO 4766. Cup point variants conform to DIN 553 / ISO 7435. Oval point types conform to DIN 914 equivalent. Inch sizes conform to ASME B18.3 and BS 4168.

Q5. Are brass slotted grub screws non-magnetic?
A: Yes. Brass is inherently non-magnetic, making brass slotted grub screws suitable for electrical panels, meter assemblies, compass mounting hardware, and any application where magnetic interference must be avoided.

Q6. Can brass slotted grub screws be used in plumbing applications?
A: Yes. Brass slotted grub screws are widely used in plumbing valve packing glands, compression fittings, ball valve handles, and water meter assemblies due to their corrosion resistance in potable water environments and compatibility with brass valve bodies.

Q7. What point styles are available for brass slotted grub screws?
A: We supply flat point (DIN 551/ISO 4766 – most common for adjustment and minimal shaft marking), cup point (DIN 553 – good grip on shafts), oval point (smooth shaft engagement), and cone point (for hard shaft materials requiring positive location) variants.

Q8. Are your brass slotted grub screws RoHS compliant?
A: Standard CZ121 (C36000) brass contains lead and is not fully RoHS compliant. For RoHS-compliant applications, we can supply low-lead brass (C35300) or lead-free brass (C69300 / ECO Brass) alternatives. Please specify your compliance requirements when enquiring.

Q9. What is the minimum order quantity for brass slotted grub screws?
A: We supply from as low as 100 pieces for sample and prototype orders. Standard production orders are typically 1,000 pieces or more per size, with full container loads available for large requirements. Contact us for a tailored quotation.

Q10. Do you supply brass slotted grub screws in BSW thread?
A: Yes. We supply brass slotted grub screws in BSW (British Standard Whitworth), BSF (British Standard Fine), UNC, UNF, and Metric thread forms to meet UK, American, European, and international standards.

Q11. Can brass slotted grub screws be nickel plated?
A: Yes. We offer bright nickel plating, tin plating, and chrome plating options on brass slotted grub screws. Nickel plating enhances corrosion resistance and provides a silver-coloured finish for decorative or technical applications where a bright appearance is required.

Q12. What is the torque rating for brass slotted grub screws?
A: Torque values depend on size and brass grade. As a guide, M4 brass slotted grub screws have a recommended tightening torque of approximately 0.6–0.9 Nm, while M8 screws are rated at approximately 3.5–5 Nm. Contact us for specific torque data for your application.

Q13. What is the lead time for brass slotted grub screws from Conex?
A: Standard sizes in common thread forms are typically available within 7–14 working days. Custom sizes, special threads, or plated finishes may require 3–4 weeks. Urgent orders can often be prioritised – contact our sales team to discuss your timeline.

Q14. Do you provide material test certificates for brass slotted grub screws?
A: Yes. Material Test Certificates with chemical composition data are provided for all export orders. Dimensional inspection reports are available on request. EN 10204 Type 2.2 or 3.1 certificates can be provided depending on order requirements.

Q15. Can Conex supply brass slotted grub screws for food and beverage equipment?
A: Yes. For food-grade applications, we can supply brass slotted grub screws in low-lead or lead-free brass alloys (C35300 or C69300 ECO Brass) with appropriate surface finishes. Please specify food-grade requirements in your enquiry so we can recommend the appropriate material and finish.

Customer Testimonials

Robert Sullivan, Plant Engineer – Toronto, Canada
“Conex has been supplying our facility with brass slotted grub screws for valve assemblies for several years. Their quality is consistently excellent, prices are competitive, and their team always responds promptly to our technical queries. We wouldn’t hesitate to recommend Conex to any industrial buyer.”

Thomas Müller, Purchasing Manager – Stuttgart, Germany
“We ordered a large volume of brass slotted set screws to DIN 551 specification from Conex. The products were exactly to drawing, the documentation was complete, and the shipment arrived on schedule. Conex demonstrated professionalism at every stage. We look forward to a long business relationship.”

Glossary of Related Terms

Grub Screw: A headless, fully threaded screw used to lock or secure components | Set Screw: American term for grub screw | Slotted Drive: A straight single-slot screw drive compatible with flat-blade screwdrivers | CZ121: British Standard designation for free machining brass (CuZn39Pb3) | C36000: ASTM/UNS designation for free machining brass | DIN 551: German standard for slotted set screws with flat point | ISO 4766: International standard equivalent to DIN 551 | Flat Point: A grub screw tip with a flat end, used where minimal shaft damage and easy adjustment are required | Cup Point: A grub screw tip with a small cup indentation providing positive engagement with shaft surface | Non-Sparking: Property of brass preventing ignition sparks in flammable environments | Free Machining Brass: Brass alloy with added lead for improved machinability | MTC: Material Test Certificate confirming chemical composition and mechanical properties

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