Description
Socket Head Cap Screw with Hexalobular Drive – MKM Fasteners
MKM Fasteners presents high-performance Socket Head Cap Screws with Hexalobular Drive, engineered to meet the demands of industries requiring high torque transmission, enhanced drive engagement, and excellent corrosion resistance. These screws feature a hexalobular drive (commonly referred to as a Torx® drive), which offers a better grip than traditional hex drives, reduces cam-out, and ensures safer and more efficient installation.
Manufactured according to ISO 14579 dimensional standards and conforming to ISO 3506-1 mechanical standards, these fasteners are ideal for precision engineering applications. The screws are crafted from high-quality stainless steel including SS 304 / SS 304L (A2) and SS 316 / SS 316L (A4) grades, ensuring exceptional corrosion resistance even in harsh and chemically aggressive environments.
Tensile Strength Options:
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A2-70: Minimum 700 MPa (SS 304 / SS 304L)
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A2-80: Minimum 800 MPa
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A4-70: Minimum 700 MPa (SS 316 / SS 316L)
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A4-80: Minimum 800 MPa
These socket screws are widely used in the automotive, aerospace, marine, machinery, and electronics sectors, where reliable and tamper-resistant fastening is essential. The hexalobular drive head offers improved tool life and reduces user fatigue during assembly and disassembly operations.
Key Specifications:
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Thread Type: Metric
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Size Range: M5–M12
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Material: SS 304 / SS 304L (A2) and SS 316 / SS 316L (A4)
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Standards: ISO 14579, ISO 3506-1
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Marking: A2-70, A2-80, A4-70, A4-80
Choose MKM Fasteners for durable, precision-engineered hexalobular socket head cap screws that deliver strength, safety, and longevity in every fastening solution.
SOCKET HEAD CAP SCREW WITH HEXAGON DRIVE
| THREAD TYPE | DIMENSIONAL STANDARD | MECHANICAL STANDARD | MARKING | TENSILE STRENGTH | MATERIAL | SIZE RANGE |
|---|---|---|---|---|---|---|
| METRIC | DIN 912 / ISO 4762 | ISO 3506-1 | A2-70 | Min 700 Mpa | SS 304 / SS 304L | Range: M6-M12 & 1/4″-1/2″ |
| A2-80 | Min 800 Mpa | SS 304 / SS 304L | ||||
| A4-70 | Min 700 Mpa | SS 316 / SS 316L | ||||
| A4-80 | Min 800 Mpa | SS 316 / SS 316L | ||||
| INCHES | ANSI B18.3 | ASTM F 837 | F837B | Min 80 ksi | SS 304 / SS 304L | Range: M6-M12 & 1/4″-1/2″ |
| F837C | Min 102 ksi | SS 304 / SS 304L | ||||
| F837E | Min 80 ksi | SS 316 / SS 316L | ||||
| F837F | Min 102 ksi | SS 316 / SS 316L |



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