Product Summary

लोंगज़े Hexagon Socket Set Screws (also known as Grub Screws) are high-precision industrial fasteners manufactured according to DIN 913 to 916 और ISO 4026 to 4029 standards, widely used in pulleys, gear

fixation, shaft collars, and precision instrumentation. Featuring a headless design with an internal hex socket, these लोंगज़े Hexagon Socket Set Screws are designed to be driven fully into a threaded hole,

applying a strong clamping force through the point to secure a rotating or sliding component to a shaft.

• ✔ Internal Hex Drive: The deep, precision-cut socket allows for high-torque tightening using Allen keys or power bits, even in recessed or confined spaces.

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• ✔ Flush Mounting: The headless profile ensures that no part of the screw protrudes above the surface, preventing interference with moving machinery.

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• ✔ Diverse Point Geometries: Available in four specialized point styles to provide the exact level of grip, permanent marking, or adjustment required for your engineering project.

Key Features of Hexagon Socket Set Screws

• High-Torque Performance – Manufactured from high-tensile Alloy Steel (Grade 45H / 12.9) या स्टेनलेस स्टील to prevent socket stripping under heavy load.

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• कंपन प्रतिरोध – The specialized points (especially Cup and Cone) bite into the mating surface, ensuring the assembly remains secure under dynamic stress.

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• Precision Machined Threads – Clean, burr-free threads ensure smooth engagement and accurate pressure distribution.

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• Standardized Versatility – Fully compliant with Metric (DIN/ISO) और Imperial (ASME) specifications for global maintenance and OEM production.

Technical Specifications

• Standards: DIN 913, 914, 915, 916 / ISO 4026, 4027, 4028, 4029 / ASME B18.3

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• Metric Size Range: M1.6 to M30

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• Inch Size Range: #0 to 1" (UNC / UNF)

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• Property Class: 45H (Alloy Steel) / A2-70, A4-80 (Stainless Steel)

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• Drive Type: Hexagon Socket (Internal Hex)

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• Finish: Black Oxide, Zinc Plated, Passivated, Plain

• Point Styles & Applications

• Point Type	Standard (DIN)	Feature	Best Application
  Flat Point	DIN 913	Smooth, flat end	Frequent adjustment; prevents damage to shafts.
  Cone Point	DIN 914	Sharp, conical tip	Permanent setting; pivots or locating pins.
  Dog Point	DIN 915	Cylindrical protrusion	Fits into a pre-drilled hole or groove for alignment.
  Cup Point	DIN 916	Hollowed, sharp rim	Most common; maximum grip and "bite" on the shaft.

• Standard Dimensions (Metric DIN 916 - Cup Point)

• Size (d)	Pitch	Socket Size (s)	Key Depth (t min)	Cup Dia (dz max)
  M4	0.7	2.0 mm	2.25 mm	2.0 mm
  M5	0.8	2.5 mm	3.00 mm	2.5 mm
  M6	1.0	3.0 mm	3.50 mm	3.0 mm
  M8	1.25	4.0 mm	5.00 mm	5.0 mm
  M10	1.5	5.0 mm	6.00 mm	6.0 mm

• Surface Treatment

• Coating	Process	Salt Spray	आवेदन
  ब्लैक ऑक्साइड	Chemical	24 to 48h	Internal Machinery / Oiled environments
  Zinc Plated	Electroplating	72 to 144h	General Industrial / Hardware
  Dacromet	Zinc-Flake	1000+h	Automotive / High-Stress Outdoor
  Passivated	Chemical	1000+h	Stainless Steel Medical & Marine