Caliper Overseas is a reliable Slotted CSK Head Screw manufacturer and supplier in India, recognized for providing precision-crafted fasteners that fulfill industry requirements. A Slotted CSK (Countersunk) Head Screw consists of a flat, conical head that has a flush-mounting feature for a neat, smooth finish. The slotted head provides for simple installation through the use of a common flat-blade screwdriver, and it can be used for a variety of applications in many industries.
Our screws are produced to international standards like DIN 963, DIN 7991, ASME B18.3, ASME B18.6.3 and ASTM A453 Grade 660. With superior mechanical properties and resistance to corrosion, it comes in stainless steel, carbon steel and alloy steel forms. Every product is tested and certified for quality and performance and durability. Select the ideal fastening solution with high-strength, corrosion-resistant Slotted CSK Head Screws meant for safe usage. Call today for quality you can rely on.

| Size | M2.5 TO M6 |
|---|---|
| Metric Size | M2 to M6 |
| Inches | 1/8” to 2BA |
| Dimensional Standards | DIN 963, ASME B18.6.3 |
| Screws Types | Slotted CSK Head Screw |
| Tolerance | +/-0.01mm to +/-0.05mm |
| Threads | METRIC, BSW, BSF, UNC, UNF or as required |
| UTS – Unified Thread Standard | UNC, UNF, UNEF, UNS, NPT, NPTF |
| Application | Wind Tower, Nuclear Power, Railway, Automotive Industry, Construction, Electronic Industry |
| Packaging | Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector |
| Forming | Hot Forged & Cold Forged |
| Certification | Dual Certified As per ASTM & ASME Codes |
| THREAD D | M1 | M1,2 | M1,4 | M1,6 | M2 | M2,5 | M3 | (M3,5) | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0,25 | 0,25 | 0,3 | 0,35 | 0,4 | 0,45 | 0,5 | 0,6 | 0,7 | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | 2,5 | |
| a | max. | 0,5 | 0,5 | 0,6 | 0,7 | 0,8 | 0,9 | 1 | 1,2 | 1,4 | 1,6 | 2 | 2,5 | 3 | 3,5 | 4 | 4 | 5 | 5 |
| b | min. | full thread | 15 | 16 | 18 | 19 | 20 | 22 | 25 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 | ||
| dk | nominal=max. | 1,9 | 2,3 | 2,6 | 3 | 3,8 | 4,7 | 5,6 | 6,5 | 7,5 | 9,2 | 11 | 14,5 | 18 | 22 | 25 | 29 | 33 | 36 |
| min. | 1,76 | 2,06 | 2,46 | 2,86 | 3,5 | 4,4 | 5,3 | 6,14 | 7,14 | 8,84 | 10,57 | 14,07 | 17,57 | 21,48 | 24,48 | 28,48 | 32,38 | 35,38 | |
| k | max. | 0,6 | 0,72 | 0,86 | 0,96 | 1,2 | 1,5 | 1,65 | 1,93 | 2,2 | 2,5 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| n | nominal | 0,25 | 0,3 | 0,3 | 0,4 | 0,5 | 0,6 | 0,8 | 0,8 | 1 | 1,2 | 1,6 | 2 | 2,5 | 3 | 3 | 4 | 4 | 5 |
| max. | 0,31 | 0,36 | 0,36 | 0,46 | 0,56 | 0,66 | 0,86 | 0,96 | 1,06 | 1,26 | 1,66 | 2,06 | 2,56 | 3,06 | 3,06 | 4,07 | 4,07 | 5,07 | |
| min. | 0,45 | 0,5 | 0,5 | 0,6 | 0,7 | 0,8 | 1 | 1 | 1,2 | 1,51 | 1,91 | 2,31 | 2,81 | 3,31 | 3,31 | 4,37 | 4,37 | 5,37 | |
| r | max. | 0,1 | 0,12 | 0,14 | 0,16 | 0,2 | 0,25 | 0,3 | 0,35 | 0,4 | 0,5 | 0,6 | 0,8 | 1 | 1,2 | 1,4 | 1,6 | 1,8 | 2 |
| t | min. | 0,2 | 0,25 | 0,28 | 0,32 | 0,4 | 0,5 | 0,6 | 0,7 | 0,8 | 1 | 1,2 | 1,6 | 2 | 2,4 | 2,8 | 3,2 | 3,6 | 4 |
| max. | 0,3 | 0,35 | 0,4 | 0,45 | 0,6 | 0,7 | 0,85 | 1 | 1,1 | 1,3 | 1,6 | 2,1 | 2,6 | 3 | 3,5 | 4 | 4,5 | 5 | |
| x | max. | - | - | - | 0,9 | 1 | 1,1 | 1,25 | 1,5 | 1,75 | 2 | 2,5 | 3,2 | 3,8 | 4,4 | 5 | 5 | 6,3 | 6,3 |
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