18-8 Stainless Steel Socket Set Screws

18-8 stainless steel socket set screws are headless threaded fasteners designed to secure collars, hubs, gears, pulleys, knobs, handles, bearings, couplings, and other shaft-mounted components. Their internal hex drive allows installation where external wrench clearance is limited, while the absence of a protruding head permits installation flush with or below the surrounding surface.

Cold Headers supplies multiple 18-8 stainless steel socket set screw point styles to accommodate different holding, positioning, and assembly requirements. Available configurations include Flat Point, Oval Point, Cone Point, and Half Dog Point designs. Each point geometry creates a different contact condition with the mating component, allowing engineers to select the style best suited for positioning, alignment, reduced surface marking, or engagement with a machined recess.

18-8 stainless steel is commonly selected for applications requiring general corrosion resistance in environments exposed to moisture, humidity, or routine washdown. These socket set screws are widely used in industrial machinery, automation equipment, packaging systems, conveyor assemblies, instrumentation, pumps, electric motors, power transmission equipment, fixtures, maintenance repairs, and OEM manufacturing.

Individual product pages provide verified dimensional information including thread size, nominal diameter, screw length, hex socket size, and applicable point geometry where available. Cold Headers offers both standard and difficult-to-source inch sizes to help engineers and purchasing professionals specify the correct fastener for demanding applications.

Available Point Styles

  • Flat Point: Broad contact surface commonly selected where reduced surface marking and repeated adjustment are preferred.
  • Oval Point: Rounded contact surface suited for applications requiring smooth contact with the mating component.
  • Cone Point: Tapered point used where concentrated contact or engagement with a locating recess is desired.
  • Half Dog Point: Cylindrical locating tip designed to engage a mating hole, groove, or recess for repeatable positioning.

Why Choose 18-8 Stainless Steel Socket Set Screws?

  • Internal hex drive for installation in confined spaces.
  • Headless design allows flush or below-surface installation.
  • 18-8 stainless steel construction provides general corrosion resistance for many industrial environments.
  • Multiple point styles support a wide range of holding and positioning requirements.
  • Verified engineering dimensions help simplify specification and procurement.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog helps engineers, distributors, maintenance professionals, and purchasing teams locate exact sizes, uncommon lengths, and difficult-to-find 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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4-40 x 1/8 18-8 Stainless Steel Socket Set Screw
List Price (per 100 pieces) $14.00
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4-40 x 3/16 18-8 Stainless Steel Socket Set Screw
List Price (per 100 pieces) $14.50
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4-40 x 1/4 18-8 Stainless Steel Socket Set Screw
List Price (per 100 pieces) $15.00
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4-40 x 5/16 18-8 Stainless Steel Socket Set Screw
List Price (per 100 pieces) $16.00
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4-40 x 3/8 18-8 Stainless Steel Socket Set Screw
List Price (per 100 pieces) $17.00
Description N/A

4-40 x 1/8 18-8 Stainless Steel Socket Set Screw is an internal-hex headless fastener supplied in Cone, Flat, Oval, and 1/2 Dog point styles. Cone point versions use a cone tip that can indent the mating shaft for strong axial holding in fixed settings, especially when a prepared dimple is part of the design.

Common application reviews include food and beverage equipment, washdown machinery, and packaging lines. Select the point by mating surface: cone point for a prepared dimple or stronger bite, flat point for a machined flat, oval point for curved contact, and 1/2 dog point for a drilled hole or slot.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material referenced to ASTM F880, used for general atmosphere, moisture exposure, and clean appearance. Cold Headers has supplied specialty socket fasteners since 1962 and supports exact-size sourcing for hard-to-find socket products.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 1/8 in.
  • Drive Type: Internal Hex
  • Hex Key Size: 0.050 in.
  • Available Points: Cone, Flat, Oval, 1/2 Dog
  • Dimensional Standard: ASME B18.3
  • Material Standard: ASTM F880

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

 		N/A

For drawings calling out 4-40 x 3/16, this 18-8 stainless socket set screw listing covers four point options: Cone, Flat, Oval, and 1/2 Dog. Flat point versions bear without a penetrating tip, making them useful on hardened shafts, machined flats, and assemblies that require periodic readjustment.

Common application reviews include electronics enclosures, instrumentation, and lab fixtures. The point choice matters as much as thread and length because it controls whether the screw bites, bears, locates, or repositions cleanly on the mating part.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material referenced to ASTM F880, used for general atmosphere, moisture exposure, and clean appearance. Cold Headers helps maintenance teams and industrial buyers locate uncommon socket set screw sizes without adding unsupported inventory claims.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 3/16 in.
  • Drive Type: Internal Hex
  • Hex Key Size: 0.050 in.
  • Available Points: Cone, Flat, Oval, 1/2 Dog
  • Dimensional Standard: ASME B18.3
  • Material Standard: ASTM F880

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

 		N/A

4-40 x 1/4 18-8 Stainless Steel Socket Set Screw is intended for headless fastening where drive access is through the socket and point style determines the seating action. Oval point versions use a radiused tip that contacts at a tangent, which can suit curved seating surfaces, splines, grooves, and repeat positioning work.

Common application reviews include pumps, outdoor fixtures, and conveyor components. Use the cone and 1/2 dog options for more fixed seating arrangements, while flat and oval options are often reviewed where readjustment or reduced surface marking matters.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material referenced to ASTM F880, used for general atmosphere, moisture exposure, and clean appearance. For production, repair, and distributor sourcing, Cold Headers can help confirm the exact size and point-style family before quoting.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 1/4 in.
  • Drive Type: Internal Hex
  • Hex Key Size: 0.050 in.
  • Available Points: Cone, Flat, Oval, 1/2 Dog
  • Dimensional Standard: ASME B18.3
  • Material Standard: ASTM F880

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

 		N/A

Use the 4-40 x 5/16 18-8 stainless socket set screw size when a bill of materials requires one thread and length with selectable Cone, Flat, Oval, or 1/2 Dog points. 1/2 dog point versions use a short cylindrical tip that locates in a drilled hole or slot for fixed positioning where a pin-like set screw point is specified.

Common application reviews include shaft collars, knobs, and machine controls. For replacement work, match the existing drawing callout before changing point style; the same diameter and length can behave differently with cone, flat, oval, or 1/2 dog contact.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material referenced to ASTM F880, used for general atmosphere, moisture exposure, and clean appearance. Cold Headers' socket fastener focus is useful when thread, length, material, and point style need to line up with an existing bill of materials.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 5/16 in.
  • Drive Type: Internal Hex
  • Hex Key Size: 0.050 in.
  • Available Points: Cone, Flat, Oval, 1/2 Dog
  • Dimensional Standard: ASME B18.3
  • Material Standard: ASTM F880

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

 		N/A

The 4-40 x 3/8 size serves shaft, hub, collar, and adjustment assemblies that need an internal hex socket set screw in 18-8 stainless steel. Cone point versions use a cone tip that can indent the mating shaft for strong axial holding in fixed settings, especially when a prepared dimple is part of the design.

Common application reviews include hubs, pulleys, and couplings. Internal hex drive access is useful in collars, hubs, knobs, and compact mechanisms where a wrench must enter from the end of the screw rather than around an external head.

18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material referenced to ASTM F880, used for general atmosphere, moisture exposure, and clean appearance. When standard catalog searches are too broad, Cold Headers supports precise socket set screw sourcing by size and point-style requirement.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Thread Size: 4-40
  • Length: 3/8 in.
  • Drive Type: Internal Hex
  • Hex Key Size: 0.050 in.
  • Available Points: Cone, Flat, Oval, 1/2 Dog
  • Dimensional Standard: ASME B18.3
  • Material Standard: ASTM F880

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Type N/A 1/2 Dog Point Cone Point Flat Point Oval Point
Diameter N/A 4-40
Length N/A 1/8 in N/A 3/16 in N/A 1/4 in N/A 5/16 in N/A 3/8 in
Material N/A 18-8 Stainless Steel
Quantity N/A 100
Package Type N/A Box
Note N/A Less Than Package Quantity Specified Plus 25%.