Newport Fasteners
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3/8-16 x 2-1/2 Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack
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3/8-16 x 2-1/2 Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack
Supplies greater tensile strength than equivalent sizes of Grade 5 or Grade 8 hex head cap screws while requiring less surface area or counterbore since the fastener is internally wrenched.
3/8"-16 x 2-1/2" Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack
Item #: 42206555

3/8"-16 x 2-1/2" Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack

86% of respondents would recommend this to a friend

Item #: 42206555

NZD 97

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

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Only 8 items left in stock.
Order now and get it around Thursday, October 08
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Supplies greater tensile strength than equivalent sizes of Grade 5 or Grade 8 hex head cap screws while requiring less surface area or counterbore since the fastener is internally wrenched.
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What Stands Out

High Strength Alloy
Crafted from premium alloy steel, these cap screws ensure high strength and durability, making them ideal for demanding applications in machinery and equipment.
Partially Threaded Design
The partially threaded design provides superior grip and load distribution, improving the performance of applications that require secure fastening.
Convenient 50 Pack
Offering a cost-effective 50 pack, this product ensures you have an ample supply of screws for various projects, enhancing convenience and affordability for users.

Product Details

Shop high-quality Socket Head Cap Screw 38-16 x 2 12. Perfect for precision assembly work and applications needing a well tooled appearance. Get the best deals at Ubuy Cook Islands.
  • Socket Head Cap Screw made from alloy steel with black oxide finish
  • Size: 38-16 x 2 12, Coarse Thread, 38 inch hexagonal Allen bolt
  • Partial thread design for precision assembly work
  • Recommended hex socket allen key wrench: 5/16
  • Black oxide finish is not protective against moisture, stainless steel recommended for moist environments
  • Supplies greater tensile strength than Grade 5 or Grade 8 hex head cap screws
Thread Size3/8-16
Thread CoveragePartially Threaded
Fastener Size3/8-16 x 2 1/2 inch
Size Name3/8-16 x 2 1/2 inch
BrandNewport Fasteners
ColorBlack
Fastener TypeSocket Screws
Unit Count1 Count
Item HighlightPartially Threaded. Internal hex (Allen) drive. ASME B18.3. High strength for machinery, molds, and equipment.
ManufacturerNewport Fasteners
Model296229
Part Number296229
Screw Head StyleSocket
Head TypeSocket
Thread TypeUnc
Set Screw Thread TypeCoarse
Thread StyleRight Hand
Drive SystemInternal Hex
Grade Ratinggrade_ 5
Material TypeAlloy Steel
Exterior FinishBlack Oxide
Metal TypeStainless Steel,Alloy Steel
MaterialAlloy Steel
Head StyleSocket
Item Weight3 lbs (1.36 kg)

Who Should Buy?

Suitable For
  • Machinery Maintenance

    Ideal for users in machinery maintenance needing durable, high-strength screws for reliable assembly and repair tasks.

  • Mold Construction

    Essential for professionals constructing molds, providing secure fastening with corrosion-resistant properties in demanding applications.

  • Mechanical Engineering

    Perfect for mechanical engineers designing equipment where precise fastening and high strength are crucial for safety and performance.

Not Suitable For
  • Lightweight Applications

    Not suitable for lightweight projects or household items that require lighter, more flexible fastening solutions.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What are 3/8"-16 X 2-1/2" Socket Head Cap Screws used for?

    Answer: 3/8"-16 X 2-1/2" Socket Head Cap Screws are commonly used in various mechanical applications, providing a strong fastening solution. Their design allows for efficient use of torque, making them suitable for high-stress environments. You'll often find them in machinery, automotive components, and furniture assembly where a robust connection is required.
  • Question: What is the material composition of these cap screws?

    Answer: These cap screws are made from alloy steel, which offers excellent strength and durability. The black oxide finish not only enhances corrosion resistance but also provides a sleek look. This material is ideal for heavy-duty applications, making these screws perfect for industrial use, assembly lines, or any project where reliability is crucial.
  • Question: What benefits does the black oxide finish provide?

    Answer: The black oxide finish on these screws improves resistance to corrosion while minimizing reflection and glare. This is especially useful in machinery and equipment where visual distraction should be minimized. Additionally, the finish enhances the screws' lifespan by providing a protective layer, making them suitable for both indoor and outdoor applications.
  • Question: How do I choose the right size socket head cap screws?

    Answer: Choosing the right size socket head cap screws involves ensuring compatibility with the pre-drilled holes and intended application. The 3/8"-16 size specifies the diameter and thread pitch, guiding you in selecting the right fastener for your needs. Always assess the materials you are fastening and consider the amount of force when determining the length and size needed.
  • Question: Can these cap screws be used for outdoor applications?

    Answer: Yes, these cap screws are suitable for outdoor applications due to their alloy steel composition and black oxide finish, which provide increased resistance to environmental factors. Use them for securing outdoor furniture, installing fixtures, or in automotive assembly where weather resistance is vital to ensure longevity and performance.
  • Question: Are these cap screws compatible with standard socket wrenches?

    Answer: Absolutely! The design of socket head cap screws allows for compatibility with standard socket wrenches, making them easy to install and remove. Their hexagonal socket provides excellent grip, facilitating the rapid tightening or loosening of screws in constrained spaces, which is common in automotive and equipment assembly.
  • Question: What is the significance of the 50-pack option?

    Answer: Opting for a 50-pack of these cap screws offers significant convenience and value for both hobbyists and professionals. It ensures you have a surplus of fasteners for multiple projects, reducing the need for frequent trips to the hardware store. This bulk option is perfect for construction projects, repairs, or manufacturing needs, where you might use many screws at once.
  • Question: Can these screws be used in high-temperature environments?

    Answer: While the alloy steel used in these cap screws can withstand moderate heat, it's crucial to evaluate the application context. For standard industrial and assembly tasks, they perform well, but they may not be suitable for extreme high-temperature environments. Always consult material specifications when using in specialized applications.
  • Question: What tools do I need to install these socket head cap screws?

    Answer: To install 3/8"-16 X 2-1/2" Socket Head Cap Screws, you'll need a compatible socket wrench or hex key, allowing a firm grip to apply torque efficiently. Depending on the project, a torque wrench may also be beneficial to ensure the screws are tightened to the appropriate specifications, preventing loosening or stripping during use.
  • Question: Where can I buy 3/8"-16 X 2-1/2" Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack?

    Answer: You can buy 3/8"-16 X 2-1/2" Socket Head Cap Screws, Alloy Steel, Black Oxide, 50 Pack at Ubuy in Cook Islands. Ubuy offers a wide selection of high-quality fasteners that cater to various building and repair needs, making it a reliable choice for your hardware purchases.

Newport Fasteners Socket Head Screws Editorial Review

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Customer Reviews & Ratings

10 customers ratings
  • 5 Star
    87%
  • 4 Star
    13%
  • 3 Star
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Pros

  • High-quality alloy steel
  • Corrosion-resistant black oxide
  • Strong and durable construction
  • Easy to install with hex socket
  • Comes in a convenient quantity

Cons

  • A few may arrive slightly scratched.

Platform Trust & Buyer Confidence

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Jasmin
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot
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“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
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Adele
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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NZD 97

Order now and get it around Thursday, October 08

QTY:

Only 8 items left in stock.
Secured transactionsecured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Features & Benefits

  • Externally threaded fastener with unified threads
  • Made from alloy steel
  • Ideal for precision assembly work with close tolerances
  • Provides greater tensile strength than Grade 5 or Grade 8 screws
  • Requires less surface area or counterbore
  • Black Oxide finish will rust if exposed to moisture

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