Cup Point Alloy Steel Metric Socket Set Screws

Cup point alloy steel metric socket set screws are headless threaded fasteners designed to secure collars, hubs, gears, pulleys, couplings, sprockets, knobs, handles, and other shaft-mounted components in metric mechanical assemblies. The internal hex drive allows installation where external wrench clearance is limited, while the recessed cup point creates localized rim contact with the mating surface to help secure assembled components. Their compact design allows installation flush with or below the surrounding surface.

Manufactured from alloy steel, these metric socket set screws are intended for demanding industrial mechanical applications requiring dependable fastening performance. They are commonly specified for metric machinery, automation equipment, robotics, machine tools, power transmission systems, conveyors, industrial tooling, maintenance repairs, and OEM manufacturing where metric fasteners are required.

Cup point geometry is frequently selected where concentrated contact with the mating surface is desired. Depending on the shaft material and installation conditions, the point may leave a witness mark or shallow indentation on the contacted surface. Proper fastener selection should consider metric thread size, screw length, metric hex socket size, mating material, installation access, acceptable surface marking, and service conditions. Individual product pages provide verified engineering dimensions to assist engineers and purchasing professionals in selecting the appropriate fastener.

Cold Headers supplies cup point alloy steel metric socket set screws in a broad range of metric thread sizes and lengths, including standard, uncommon, and difficult-to-source configurations. Our catalog is organized to simplify exact-size sourcing while providing consistent engineering information across every product family.

Why Choose Cup Point Alloy Steel Metric Socket Set Screws?

  • Cup point geometry: Creates localized rim contact with the mating surface.
  • Metric thread sizes: Designed for machinery and equipment utilizing metric fasteners.
  • Internal hex drive: Allows installation using standard metric hex keys or hex bits.
  • Alloy steel construction: Intended for demanding industrial mechanical applications.
  • Verified engineering dimensions: Product pages provide metric thread size, screw length, nominal diameter, metric hex socket size, and additional engineering information where available.

Selecting the Correct Metric Cup Point Socket Set Screw

Begin by confirming the required metric thread size and screw length. Review the metric hex socket size, mating material, installation clearance, operating environment, acceptable surface marking, and assembly requirements before selecting a fastener. Cup point socket set screws should not be substituted automatically for cone point, flat point, oval point, knurled cup point, half dog point, or full dog point designs because each point geometry serves a different mechanical function.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog helps engineers, distributors, maintenance professionals, and purchasing teams locate exact metric sizes, uncommon lengths, and difficult-to-find metric socket set screws without unsupported inventory claims.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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Unit of Measure
Items
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M3-0.5 x 3 Cup Point Alloy Steel Metric Socket Set Screw
List Price (per 100 pieces) $6.60
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M3-0.5 x 4 Cup Point Alloy Steel Metric Socket Set Screw
List Price (per 100 pieces) $4.85
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M3-0.5 x 5 Cup Point Alloy Steel Metric Socket Set Screw
List Price (per 100 pieces) $4.90
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M3-0.5 x 6 Cup Point Alloy Steel Metric Socket Set Screw
List Price (per 100 pieces) $5.00
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M3-0.5 x 8 Cup Point Alloy Steel Metric Socket Set Screw
List Price (per 100 pieces) $5.05
Description N/A

M3-0.5 x 3 Cup Point Alloy Steel Metric Socket Set Screw is a headless internal-hex set screw for locking collars, hubs, and controls on metric shafts.

Conveyor drive components and packaging machinery drives use metric cup points in compact rotating assemblies. European drawings frequently call this screw DIN 916; ISO 4029 superseded that standard with matching dimensional geometry for this cup point form. Review the metric diameter, length, cup diameter, and hex key together before substitution.

For hard-to-find metric cup point set screws, Cold Headers can help review uncommon lengths and large-diameter requirements.

Technical Highlights

  • Point: Cup (recessed rim)
  • Material: Alloy Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 3 mm
  • Cup Diameter (dz): 1.40 / 1.15 mm (max/min)
  • Hex Key Size: 1.5 mm
  • Length Tolerance: ±0.2 mm
  • Dimensional Standard: ISO 4029 / DIN 916

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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M3-0.5 x 4 Cup Point Alloy Steel Metric Socket Set Screw fits metric power-transmission hardware where a recessed cup rim is used to hold position.

Metric shaft collars, locating rings, and bearing retainers can use this screw when the design accepts cup-point marking. The cup rim concentrates load and may leave a witness ring or shallow indentation on the shaft, which is part of the holding method. Review the metric diameter, length, cup diameter, and hex key together before substitution.

Cold Headers helps distributors, OEM teams, and plant maintenance groups match metric diameter, pitch, length, and drive size.

Technical Highlights

  • Point: Cup (recessed rim)
  • Material: Alloy Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 4 mm
  • Cup Diameter (dz): 1.40 / 1.15 mm (max/min)
  • Hex Key Size: 1.5 mm
  • Length Tolerance: ±0.24 mm
  • Dimensional Standard: ISO 4029 / DIN 916

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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M3-0.5 x 5 Cup Point Alloy Steel Metric Socket Set Screw supports imported machinery service when the print calls for an ISO 4029 or DIN 916 cup point.

Conveyor drive components and packaging machinery drives use metric cup points in compact rotating assemblies. Set screws load primarily in compression rather than tension, so the governing standards treat hardness and torsional behavior differently than cap screw tensile ratings. Review the metric diameter, length, cup diameter, and hex key together before substitution.

Cold Headers supports imported equipment rebuilds where the replacement screw must match the original metric callout.

Technical Highlights

  • Point: Cup (recessed rim)
  • Material: Alloy Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 5 mm
  • Cup Diameter (dz): 1.40 / 1.15 mm (max/min)
  • Hex Key Size: 1.5 mm
  • Length Tolerance: ±0.24 mm
  • Dimensional Standard: ISO 4029 / DIN 916

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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M3-0.5 x 6 Cup Point Alloy Steel Metric Socket Set Screw gives maintenance teams an exact metric thread and length for replacing worn shaft set screws.

Metric shaft collars, locating rings, and bearing retainers can use this screw when the design accepts cup-point marking. Cold Headers can install nylon locking pellets on non-catalog metric set screws at the Chicago facility when additional prevailing torque is specified. For metric prints exposed to corrosive service, Cup Point 18-8 Stainless Metric Socket Set Screws should be reviewed as a separate material family. Review the metric diameter, length, cup diameter, and hex key together before substitution.

Cold Headers brings long-running socket-product knowledge to metric set screw sourcing, replacement, and quote requests.

Technical Highlights

  • Point: Cup (recessed rim)
  • Material: Alloy Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 6 mm
  • Cup Diameter (dz): 1.40 / 1.15 mm (max/min)
  • Hex Key Size: 1.5 mm
  • Length Tolerance: ±0.24 mm
  • Dimensional Standard: ISO 4029 / DIN 916

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

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M3-0.5 x 8 Cup Point Alloy Steel Metric Socket Set Screw is used where a headless fastener must lock a component without adding an external screw head.

Automation and robotics joints can use the screw for retained knobs, stops, collars, and small adjustment parts. A DIN 916 callout is commonly satisfied by an ISO 4029 cup point socket set screw when the metric size and length match the print. Review the metric diameter, length, cup diameter, and hex key together before substitution.

For hard-to-find metric cup point set screws, Cold Headers can help review uncommon lengths and large-diameter requirements.

Technical Highlights

  • Point: Cup (recessed rim)
  • Material: Alloy Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 8 mm
  • Cup Diameter (dz): 1.40 / 1.15 mm (max/min)
  • Hex Key Size: 1.5 mm
  • Length Tolerance: ±0.29 mm
  • Dimensional Standard: ISO 4029 / DIN 916

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Diameter N/A M3-0.5
Length N/A 3 mm N/A 4 mm N/A 5 mm N/A 6 mm N/A 8 mm
Material N/A Alloy Steel
Quantity N/A 100
Package Type N/A Box
Key Size N/A 1.5 mm
Industry Standard N/A German Institute for Standardization (DIN 916)
Note N/A