Oval Point Alloy Steel Socket Set Screws with Nylon Insert

Oval point alloy steel socket set screws with nylon insert combine the smooth bearing characteristics of an oval point set screw with a factory-installed nylon locking element that provides prevailing torque during installation. The rounded oval point is designed to provide broad contact with the mating surface while helping reduce surface marking compared to pointed set screw styles. The nylon insert helps increase resistance to thread loosening caused by vibration, repeated movement, and dynamic loading, while the internal hex drive allows installation where external wrench clearance is limited.

Manufactured from alloy steel, these socket set screws are intended for demanding industrial mechanical applications requiring secure positioning together with frequent adjustment or repositioning. Oval point designs are commonly selected for collars, hubs, pulleys, gears, guides, adjustment mechanisms, fixtures, machine tools, automation equipment, conveyors, maintenance repairs, and OEM assemblies where repeated repositioning of shaft-mounted components may be required.

Proper fastener selection should consider thread size, screw length, hex socket size, mating material, installation access, acceptable holding characteristics, and service conditions. Individual product pages provide verified engineering dimensions, including thread size, screw length, nominal diameter, hex socket size, and additional engineering information where available. The nylon insert provides prevailing torque but should not be considered a substitute for proper joint design or installation practices.

Cold Headers supplies oval point alloy steel socket set screws with nylon insert in a broad range of inch 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 Oval Point Alloy Steel Socket Set Screws with Nylon Insert?

  • Factory-installed nylon insert: Provides prevailing torque to help resist thread loosening.
  • Oval point geometry: Provides smooth bearing contact and is commonly selected for applications requiring repeated adjustment.
  • Alloy steel construction: Intended for demanding industrial mechanical applications.
  • Internal hex drive: Allows installation where external wrench clearance is limited.
  • Verified engineering dimensions: Product pages provide thread size, screw length, nominal diameter, hex socket size, and additional engineering information where available.

Selecting the Correct Oval Point Socket Set Screw

Begin by confirming the required thread size and screw length. Review the hex socket size, mating material, installation clearance, operating environment, and assembly requirements before selecting a fastener. Oval point socket set screws should not be substituted automatically for cup point, cone point, flat 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 sizes, uncommon lengths, and difficult-to-find alloy steel socket set screws with nylon insert without unsupported inventory claims.

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

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4-40 x 3/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert
List Price (per 100 pieces) $94.00
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4-40 x 1/4 Oval Point Alloy Steel Socket Set Screw with Nylon Insert
List Price (per 100 pieces) Call or Email for Pricing
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4-40 x 5/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert
List Price (per 100 pieces) Call or Email for Pricing
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4-40 x 3/8 Oval Point Alloy Steel Socket Set Screw with Nylon Insert
List Price (per 100 pieces) Call or Email for Pricing
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4-40 x 7/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert
List Price (per 100 pieces) Call or Email for Pricing
Description N/A

4-40 x 3/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert is a heat-treated alloy steel oval point socket set screw with a nylon insert for prevailing torque. Oval point geometry favors adjustable contact and re-seating rather than maximum bite into the mating part. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Spline-adjacent and keyway-adjacent seating may call for a rounded point where sharp engagement would be too aggressive. When maximum bite on a plain shaft matters more than adjustability, compare Cup Point Alloy Set Screws with Nylon Insert.

Cold Headers installs nylon locking pellets in-house at its Chicago facility for this oval point set screw family. Since 1962, Cold Headers has helped buyers distinguish similar socket set screws by point geometry and locking feature. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution.

Technical Highlights

  • Point: Oval (rounded radiused tip)
  • Material: Alloy Steel
  • Thread Size: 4-40
  • Length: 3/16 in.
  • Drive: Internal Hex
  • Hex Key Size: 0.050 in.
  • Locking Feature: Nylon insert providing prevailing torque
  • Nylon Insert Diameter (P): 1/16 in.
  • Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
  • Dimensional Standard: ASME B18.3

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

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4-40 x 1/4 Oval Point Alloy Steel Socket Set Screw with Nylon Insert is built for adjustable contact where a rounded point should bear smoothly instead of biting sharply. The internal hex drive keeps the screw headless and accessible in collars, hubs, handles, and compact control parts. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Linkage and lever assemblies may use this point style where the screw meets the mating part at an odd angle.

Cold Headers supports distributor, OEM, and maintenance sourcing when an oval point part must match the existing print. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution.

Technical Highlights

  • Point: Oval (rounded radiused tip)
  • Material: Alloy Steel
  • Thread Size: 4-40
  • Length: 1/4 in.
  • Drive: Internal Hex
  • Hex Key Size: 0.050 in.
  • Locking Feature: Nylon insert providing prevailing torque
  • Nylon Insert Diameter (P): 1/16 in.
  • Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
  • Dimensional Standard: ASME B18.3

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

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4-40 x 5/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert combines an oval bearing tip, internal hex drive, and nylon locking pellet for repeated machine settings. The rounded oval point can make tangent contact on flat, angled, curved, or grooved mating surfaces. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Automation machinery can use these screws in compact collars, guide blocks, stops, and control components.

This catalog separates oval point locking screws from plain oval point parts so the insert requirement stays visible. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution. Socket-key access remains compact when the screw sits below the outside surface of a collar or hub.

Technical Highlights

  • Point: Oval (rounded radiused tip)
  • Material: Alloy Steel
  • Thread Size: 4-40
  • Length: 5/16 in.
  • Drive: Internal Hex
  • Hex Key Size: 0.050 in.
  • Locking Feature: Nylon insert providing prevailing torque
  • Nylon Insert Diameter (P): 1/16 in.
  • Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
  • Dimensional Standard: ASME B18.3

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

 		N/A

4-40 x 3/8 Oval Point Alloy Steel Socket Set Screw with Nylon Insert gives designers a rounded-contact set screw for shafts, grooves, and seats that may not be perfectly square. This point style is useful when the part may be loosened and reset without the deep mark of a biting point. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Machine rebuilds use this family when the service record calls for alloy steel, an oval point, and a nylon insert.

In-house pellet installation supports uncommon oval point nylon-insert requirements when a standard plain screw is not enough. Cold Headers can quote the requested oval point nylon-insert item without steering the request toward a biting point style. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution.

Technical Highlights

  • Point: Oval (rounded radiused tip)
  • Material: Alloy Steel
  • Thread Size: 4-40
  • Length: 3/8 in.
  • Drive: Internal Hex
  • Hex Key Size: 0.050 in.
  • Locking Feature: Nylon insert providing prevailing torque
  • Nylon Insert Diameter (P): 1/16 in.
  • Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
  • Dimensional Standard: ASME B18.3

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

 		N/A

4-40 x 7/16 Oval Point Alloy Steel Socket Set Screw with Nylon Insert is specified when tangent contact and thread-level locking are both required in a headless fastener. Oval point geometry favors adjustable contact and re-seating rather than maximum bite into the mating part. Specify the heat-treated alloy steel body with nylon pellet when the print calls for mechanical set screw hardware, not a stainless substitute.

Fine-thread 7/16-20 and 5/8-18 rows help match uncommon oval point locking requirements that are easy to mis-source. Alloy steel is not the corrosion-focused option, so use protective oiling or a stainless request when exposure requires it.

Cold Headers has supplied specialty socket fasteners since 1962, with separate catalog language for each set screw point style. Check thread size, length, socket size, pellet dimensions, groove or seat condition, and surface-marking tolerance before substitution.

Technical Highlights

  • Point: Oval (rounded radiused tip)
  • Material: Alloy Steel
  • Thread Size: 4-40
  • Length: 7/16 in.
  • Drive: Internal Hex
  • Hex Key Size: 0.050 in.
  • Locking Feature: Nylon insert providing prevailing torque
  • Nylon Insert Diameter (P): 1/16 in.
  • Nylon Insert Location (N): 3/32 in., +/-1/2 pitch
  • Dimensional Standard: ASME B18.3

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Diameter N/A 4-40
Length N/A 3/16 in N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 7/16 in
Material N/A Alloy Steel
Quantity N/A 100
Package Type N/A Box
Note N/A Less Than Package Quantity Specified Plus 25%.