| Size | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, |
|---|---|
| Type | Bolt, Custom Fasteners, Nut, Screw, Washer, Rivet, Threaded Rod, Studs, Coated, Nails |
| Standard | Din, Iso, Jis, Gb, Is, Bs, Astm |
| Length | 3/8 to 8″ |
| Material | Stainless Steel, Phosphor Bronze, Monel, Inconel, Incoloy, Hastelloy, Nickel, Silicon Bronze |
Countersunk Bolts Used in Flush Surface Fastening for Mechanical Electrical and Structural Installations Supplier in India
Caliber Enterprise, the company specializing in the provision of reliable fastening solutions to various industrial requirements, is a top Countersunk Bolts Manufacturer that specializes in the provision of high quality bolts used to provide secure and flush fastening in the metal, wood and plastic application. Countersunk bolts have a tapered head which is flush with the surface and it provides a smooth finish, yet it provides strong and reliable joints. The bolts find extensive application in construction, machinery, fabrication and equipment assembly where it is important to have surface alignment and appearance. In highly industrialized applications of PEEK nut bolts, such as to provide light weight performance, chemical resistance, and electrical insulation are common alternatives to PEEK.
To accommodate light-duty and heavy-duty conditions of operations, countersunk bolts are produced in different sizes, materials and finishes. Their mechanical strength and size accuracy can enable them to deliver under the mechanical pressure and frequent usage. In constructions and load-carrying projects where increased strength and greater tensile capacity in bolts are needed, it is customary to choose High tensile bolts to provide a high holding capacity and stability over time. Collectively, these fastening solutions enhance accuracy of assembly, high-quality, and uniformity of work in industrial, business, and engineering works.
Blind Flanges – Dimensional & Rating Table
| Material | Grade / Standard | Fastener Type | Size Range | Head Angle | Drive Type | Surface Finish | Typical Applications |
|---|---|---|---|---|---|---|---|
| Carbon Steel | IS 1365 | Countersunk Screw | M3–M20 | 90° | Slotted / Phillips | Zinc Plated | Sheet metal, panels |
| Carbon Steel | ISO 10642 | Socket CSK Screw | M4–M24 | 90° | Allen | Black Oxide | Machinery assemblies |
| Alloy Steel | ASTM A574 | Socket CSK Screw | M5–M30 | 90° | Allen | Plain | High-load joints |
| Stainless Steel | A2-70 (304) | Countersunk Screw | M3–M20 | 90° | Phillips / Torx | Plain | Corrosion-prone areas |
| Stainless Steel | A4-80 (316) | Countersunk Screw | M4–M24 | 90° | Allen | Plain | Marine & chemical service |
- Usage & Installation Purpose: Countersunk bolts are applied when a fully smooth surface is needed at the end of the installation and eliminates protrusions which could inhibit movement, safety or aesthetics. They are usually used in steel buildings, machine foundations, conveyors, floors and fabricated assemblies where even loading and alignment of surfaces is important.
- Manufacturing and Quality Control- These bolts are manufactured in correctly machined countersunk heads that fit normal seating angles so that there is even distribution of loads after tightening. Regular thread rolling and dimensional inspections contribute to fastening reliability and minimize the loosening process in the presence of vibration and assist in tightening repeatedly in the course of maintenance operations.
- Material Grades & Standards: Available in the Carbon Steel, Alloy Steel and Stainless Steel grades like ASTM A307, ASTM A325, ASTM A193, and Stainless Steel 304/316 where manufacturing can be in DIN, ISO and IS standards, depending on the application and pressure requirements.
- Other Characteristics of Performance: The countersunk bolts also serve both practical and aesthetic requirements as they spring up with both good mechanical locking and clean, flat surface finish. Plain, zinc-plated, and coated finishes can be provided to allow indoor applications or outdoor exposure and moderate corrosive conditions.
Client Project Report of Countersunk Bolts
| Product Supplied | Quantity | Cities (India) |
|---|---|---|
| Countersunk Bolts for Structural Plate Connections | 193 Pieces | Bhilai |
| Countersunk Bolts for Machinery Base Assemblies | 167 Pieces | Pune |
| Countersunk Bolts for Architectural Steel Work | 208 Pieces | Ahmedabad |
| Countersunk Bolts for Equipment Mounting Systems | 176 Pieces | Hosur |
Type of Sub-products

Flat Head Countersunk Bolts Flat Head Countersunk Bolts
Flat Head Countersunk Bolts are fasteners with a flat, tapered head designed to sit flush with the surface, offering a clean and smooth finish, commonly used in machinery, automotive, and structural applications where a streamlined appearance is required.

Phillips Countersunk Bolts Phillips Countersunk Bolts
Phillips Countersunk Bolts are fasteners with a flat, conical head featuring a Phillips drive, designed to sit flush with the surface, offering a neat finish and easy installation, widely used in machinery, furniture, and automotive applications.
