Our Product
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Authentic, certified high-tensile and stainless steel fasteners — sourced directly from Sundram Fasteners Limited and held in stock at our 9,000 sq ft Tiruchirappalli facility.
High-tensile hexagonal head bolts engineered for structural and mechanical applications. Manufactured by Sundram Fasteners Limited with precise dimensional accuracy and certified mechanical properties. Ideal for PEB structures, machinery assemblies, and infrastructure projects.
| Size Range | M6 to M36 |
| Length Range | 20mm to 300mm |
| Grade | 8.8 / 10.9 |
| Standard | ISO 4014 / IS 1364 |
| Finish | Black / Zinc Plated / HDG |
| Thread | Metric Coarse |
Full-thread hexagonal head screws providing reliable clamping force across the entire shank length. Suitable for through-bolting applications requiring consistent grip and load distribution in demanding industrial environments.
| Size Range | M6 to M24 |
| Length Range | 16mm to 200mm |
| Grade | 8.8 / 10.9 |
| Standard | DIN 933 / ISO 4017 |
| Finish | Black / Zinc / HDG |
| Thread | Full Thread, Metric Coarse |
Cylindrical-head cap screws with internal hex drive, manufactured to Grade 12.9 for maximum strength in precision engineering applications. The compact head profile allows use in confined spaces where hex-head bolts cannot be accommodated.
| Size Range | M3 to M24 |
| Length Range | 8mm to 200mm |
| Grade | 12.9 |
| Standard | ISO 4762 / DIN 912 |
| Finish | Black Oxide |
| Drive | Internal Hex (Allen) |
Heavy-duty socket head bolts for industrial, PEB, and structural applications where high clamping force and precision are required. The internal hex drive enables high torque application in tight spaces.
| Size Range | M8 to M36 |
| Length Range | 20mm to 300mm |
| Grade | 10.9 / 12.9 |
| Standard | DIN 912 / ISO 4762 |
| Finish | Black Oxide / Zinc |
| Drive | Internal Hex |
Flat-head countersunk screws that sit flush with the surface when installed, providing a clean, professional finish. Used extensively in panel assemblies, aerospace-grade fixtures, and applications where protrusion is unacceptable.
| Size Range | M3 to M20 |
| Length Range | 8mm to 150mm |
| Grade | 10.9 |
| Standard | ISO 10642 / DIN 7991 |
| Finish | Black Oxide |
| Head Angle | 90° |
Headless grub screws used to secure rotating components on shafts or to apply pressure against another component. Available in cup point, flat point, and cone point variants for different holding requirements.
| Size Range | M3 to M16 |
| Length Range | 3mm to 50mm |
| Grade | 45H |
| Standard | ISO 4026 / DIN 913 |
| Finish | Black Oxide |
| Point Types | Cup / Flat / Cone |
Standard hexagonal nuts manufactured to precise tolerances for use with all Sundram hex bolts and screws. Available in Grade 8 and Grade 10 to match corresponding bolt grades for complete fastener assembly performance.
| Size Range | M6 to M36 |
| Grade | 8 / 10 |
| Standard | ISO 4032 / IS 1364 |
| Finish | Black / Zinc Plated / HDG |
| Thread | Metric Coarse |
| Style | Regular / Thin (Jam) |
Prevailing-torque nylon insert lock nuts (also known as Nyloc nuts) that resist loosening under vibration. The nylon insert deforms slightly when the bolt enters, creating a friction grip that maintains clamp force in dynamic applications.
| Size Range | M6 to M24 |
| Grade | 8 |
| Standard | ISO 7042 / DIN 985 |
| Finish | Zinc Plated |
| Insert | Nylon (PA6) |
| Temp. Range | Up to 120°C |
Complete range of stainless steel fasteners including bolts, screws, nuts, and washers. Available in SS 304 (A2) and SS 316 (A4) grades. Ideal for solar panel mounting structures, coastal infrastructure, food processing, and any application requiring superior corrosion resistance.
| Material | SS 304 / SS 316 |
| Grade | A2-70 / A4-80 |
| Standard | ISO 3506 |
| Size Range | M4 to M24 |
| Finish | Natural / Passivated |
| Types | Bolts, Nuts, Screws, Washers |
L-shaped Allen / hex keys manufactured from chrome vanadium steel for durability and torque resistance. Used for installation and removal of all socket-head fasteners. Available individually or as complete metric sets.
| Size Range | 1.5mm to 19mm |
| Material | Chrome Vanadium Steel |
| Standard | DIN 911 |
| Finish | Black Oxide |
| Form | L-Shape / T-Handle |
| Set Options | 9-piece / 13-piece Metric |
Metric Series
Specification : Generally conforming to IS:2269, DIN 912, ISO:4762
Threads : 12.9 Grade 5g6g as per ISO 261, ISO 965-2; ISO 965-3
Material : Special grade alloy steel, 8.8 & 10.9 Low Carbon boron steel, Medium carbon steel, Medium carbon boron
steel, Special alloy steel
8.8, 10.9, 12.9 As per ISO 898-1
Mechanical Properties : 8.8, 10.9, 12.9 As per ISO 898-1
Finish : Thermal/ Chemical Blackened with rust preventive oil (Black colour)
Socket Head Cap Screws
Socket Set Screws
Metric Series
(Knurled Cup Point, Flat Point, Cone Point, Dog Point, Plain Cup Point)
Specification : Generally conforming to IS:6094, ISO:4026, ISO 4027, ISO 4028, ISO 4029
Threads : 5g6g as per ISO 261, ISO 965-2, ISO 965-3
Material : Special grade alloy steel
Mechanical Properties : Property class 45H as per ISO 898-5
Finish : Thermal/ Chemical Blackened with rust preventive oil (Black colour)
Metric Series
Specification : Generally conforming to ISO 10642
Threads : 12.9 Grade 5g6g as per ISO 261, ISO 965-2; ISO 965-3
Material : Special grade alloy steel
Mechanical properties : Property class 12.9 as per IS:1367-3, ISO 898-1
Note : All sizes are fully threaded.
Finish : Thermal/ Chemical Blackened with rust preventive oil (Black colour)
(For details on inch series, refer pricing catalogue)
Socket Countersunk Head Cap Screws
Socket Button Head Cap Screws
Metric Series
(Knurled Cup Point, Flat Point, Cone Point, Dog Point, Plain Cup Point)
Specification : Generally conforming to IS:6094, ISO:4026, ISO 4027, ISO 4028, ISO 4029
Threads : 5g6g as per ISO 261, ISO 965-2, ISO 965-3
Material : Special grade alloy steel
Mechanical Properties : Property class 45H as per ISO 898-5
Finish : Thermal/ Chemical Blackened with rust preventive oil (Black colour)
Metric Series
Specification : Generally conforming to IS:2269, ISO:4762, DIN 912
ISO Metric, 5g6g for 12.9; 6g 8.8 & 10.9 as per ISO 261, ISO 965-2, ISO 965-3
Threads : 12.9 – Special grade alloy steel
Material : 8.8 & 10.9 Low Carbon boron steel, Medium carbon steel, Medium carbon boron
steel, Special alloy steel
Mechanical Properties : Property class as per ISO 898-1
Finish : 12.9 Grade – Thermal/ Chemical Blackened with rust preventive oil (Black colour)
(For details on inch series, refer pricing catalogue)
Socket Head Cap Bolts
Socket Keys
Metric Series
Specification : IS 3082: ISO 2936: DIN 911
Material : Special grade alloy steel
Mechanical Properties : 50 HRc (1.5mm to 8mm),
48 HRc ( 9mm to 14mm), 45 HRc ( 15mm to 36mm)
Finish : Blackened & Coated with rust preventive oil
(For details on inch series, refer pricing catalogue)
Metric Series
Specification : IS 1364/2002, DIN 931 / DIN 933 ISO 4014/4017
Thread Fit : IS 4218/2001
Supply Condition : IS 1367/2002
(For details on inch series, refer pricing catalogue)
Hexagonal Head Screws
Hexagonal Head Bolts
Metric Series
Specification : IS 1364/2002, DIN 931 / DIN 933 ISO 4014/4017
Thread Fit : IS 4218/2001
Supply Condition : IS 1367/2002
(For details on inch series, refer pricing catalogue)
Metric Series
Specification : ISO 4032 / DIN 934
Thread Fit : IS : 4218 / 2001
Supply Condition : IS : 1367 / 2002
Mechanical Property : GR 8 / GR 10
(For details on inch series, refer pricing catalogue)
Hexagonal Nuts
Hexagonal Sunloc Nuts
