Cup Point 18-8 Stainless Steel Metric Socket Set Screws

Cup point 18-8 stainless 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 18-8 stainless steel, these metric socket set screws provide general corrosion resistance for many industrial environments exposed to moisture, humidity, or routine washdown. They are commonly specified for metric machinery, automation equipment, robotics, instrumentation, conveyors, machine tools, maintenance repairs, and OEM manufacturing where stainless steel construction and metric fastening 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 18-8 stainless 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 18-8 Stainless 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.
18-8 stainless steel: Provides general corrosion resistance for many industrial environments.
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.

Unit of Measure

Items	M3-0.5 x 3 SSS Cup Point 18-8 Metric M3-0.5 x 3 Cup Point 18-8 Stainless Steel Metric Socket Set Screw List Price (per 100 pieces) $8.60	M3-0.5 x 4 SSS Cup Point 18-8 Metric M3-0.5 x 4 Cup Point 18-8 Stainless Steel Metric Socket Set Screw List Price (per 100 pieces) $6.95	M3-0.5 x 5 SSS Cup Point 18-8 Metric M3-0.5 x 5 Cup Point 18-8 Stainless Steel Metric Socket Set Screw List Price (per 100 pieces) $7.00	M3-0.5 x 6 SSS Cup Point 18-8 Metric M3-0.5 x 6 Cup Point 18-8 Stainless Steel Metric Socket Set Screw List Price (per 100 pieces) $7.20	M3-0.5 x 8 SSS Cup Point 18-8 Metric M3-0.5 x 8 Cup Point 18-8 Stainless Steel Metric Socket Set Screw List Price (per 100 pieces) $7.50
Description	N/A M3-0.5 x 3 Cup Point 18-8 Stainless Steel Metric Socket Set Screw is a headless internal-hex fastener for locking collars and hubs in wet metric equipment. Pharma equipment, clean fixtures, and stainless process details may specify this material family for policy and service reasons. European drawings often call this geometry DIN 916; ISO 4029 superseded it with matching cup point dimensions. Confirm the metric thread, length, cup diameter, and hex key before substituting another set screw. For hard-to-find stainless metric cup point set screws, Cold Headers can help review uncommon sizes and service requirements. Technical Highlights Point: Cup (recessed rim) Material: 18-8 Stainless 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.	N/A M3-0.5 x 4 Cup Point 18-8 Stainless Steel Metric Socket Set Screw gives metric shaft hardware a stainless cup-rim set screw for washdown service. Metric collars, couplings, and guide rings use the cup rim to concentrate contact at the selected location on the shaft. Stainless-on-stainless threads can gall when driven fast and dry, so moderate installation speed and suitable lubricant help protect the tapped hole. Confirm the metric thread, length, cup diameter, and hex key before substituting another set screw. Cold Headers helps maintenance teams and distributors match metric diameter, pitch, length, material, and point style. Technical Highlights Point: Cup (recessed rim) Material: 18-8 Stainless 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.	N/A M3-0.5 x 5 Cup Point 18-8 Stainless Steel Metric Socket Set Screw supports imported equipment repairs where stainless material is required on the metric print. Humid-plant maintenance often requires matching the original metric diameter and length without converting the assembly to inch hardware. 18-8 stainless is broadly comparable to the A2 stainless material family, but the exact material callout should govern the purchase. Confirm the metric thread, length, cup diameter, and hex key before substituting another set screw. Cold Headers supports imported equipment rebuilds where the replacement screw must preserve the original metric callout. Technical Highlights Point: Cup (recessed rim) Material: 18-8 Stainless 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.	N/A M3-0.5 x 6 Cup Point 18-8 Stainless Steel Metric Socket Set Screw is used when a cup point must hold a setting without leaving an external screw head. Pharma equipment, clean fixtures, and stainless process details may specify this material family for policy and service reasons. Cold Headers can install nylon locking pellets on non-catalog metric set screws at the Chicago facility when prevailing torque is specified. Cup Point Alloy Steel Metric Socket Set Screws remain the dry-service option when maximum bite and the M24 size are required. Confirm the metric thread, length, cup diameter, and hex key before substituting another set screw. Cold Headers brings long-running socket-product knowledge to stainless set screw sourcing, MRO, and production quote requests. Technical Highlights Point: Cup (recessed rim) Material: 18-8 Stainless 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.	N/A M3-0.5 x 8 Cup Point 18-8 Stainless Steel Metric Socket Set Screw helps keep collars, pulleys, and adjustment parts serviceable in humid plant areas. Food and beverage line drives use this style where a collar or pulley must remain adjustable after cleaning cycles. A stainless DIN 916 callout is commonly satisfied by this ISO 4029 cup point when the metric size and length match. Confirm the metric thread, length, cup diameter, and hex key before substituting another set screw. For hard-to-find stainless metric cup point set screws, Cold Headers can help review uncommon sizes and service requirements. Technical Highlights Point: Cup (recessed rim) Material: 18-8 Stainless 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 18-8 Stainless Steel
Quantity	N/A 100
Package Type	N/A Box
Note	N/A