Newport Fasteners
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3/8-16 x 3/4 Flat Head Socket Cap Screws, Alloy Steel, 100 Pack
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3/8-16 x 3/4 Flat Head Socket Cap Screws, Alloy Steel, 100 Pack
Used when a flush mounting, high strength screw is required.
3/8"-16 x 3/4" Flat Head Socket Cap Screws, Alloy Steel, 100 Pack
Item #: 221170741

3/8"-16 x 3/4" Flat Head Socket Cap Screws, Alloy Steel, 100 Pack

89% of respondents would recommend this to a friend

Item #: 221170741

TZS 236885

Price Details

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*All items will import from US

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Used when a flush mounting, high strength screw is required.
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What Stands Out

Durable Material
Crafted from alloy steel, these screws provide high strength and wear resistance, ensuring longevity and reliability for demanding applications.
Versatile Size
With dimensions of 3/8-16 x 3/4 inches, these screws fit a variety of projects, making them ideal for both professionals and DIY enthusiasts needing compatible fasteners.
Coarse Thread Design
The coarse thread ensures easier insertion and better grip, reducing the risk of stripping, which enhances overall efficiency in assembly tasks.

Product Details

Shop 3/8-16 x 3/4 Flat Head Socket Cap Screws, Alloy Steel, 100 Pack online at a best price in Tanzania. B07CPJ5PL9
Thread Size3/8-16
Exterior FinishBlack Oxide
Screw Head StyleFlat
ColorBlack
Fastener Typebutton
Thread TypeUnc
Thread StyleRight Hand
Head TypeButton
Drive SystemInternal Hex
Set Screw Thread TypeCoarse
Material TypeAlloy Steel
Metal TypeStainless Steel,Alloy Steel
Item HighlightFully Threaded. Black Oxide finish. Internal hex (Allen) drive. ASME B18.3.
Size Name3/8-16 x 3/4 inch (9692.6 cm)
Thread CoverageFully Threaded
BrandNewport Fasteners
ManufacturerNewport Fasteners
Part Number777165
MaterialAlloy Steel
Head StyleFlat
Item Weight5 lbs (2.27 kg)

Who Should Buy?

Suitable For
  • Hardware Assemblers

    Ideal for technicians assembling machinery or furniture that require secure, flush fittings for a neat appearance.

  • DIY Enthusiasts

    Perfect for home improvement projects where strong, durable fasteners are necessary for bolts in various materials.

  • Manufacturing Professionals

    Suitable for those in automotive or manufacturing sectors needing reliable, high-strength fasteners in bulk quantities.

Not Suitable For
  • Light-Duty Use

    Not suitable for applications requiring lightweight screws, as these screws are made for more demanding jobs.

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What are the specifications of 3/8"-16 x 3/4" flat head socket cap screws?

    Answer: The 3/8"-16 x 3/4" flat head socket cap screws are made of high-quality alloy steel, offering excellent strength and durability. The measurement indicates a diameter of 3/8 inch with a unified thread pitch of 16 threads per inch. The length of 3/4 inch refers to the screw's overall length, while the flat head design allows for a neat and flush finish when installed. These screws are ideal for applications requiring a strong connection while maintaining a low-profile appearance.
  • Question: What tools are needed to install these socket cap screws?

    Answer: To install the 3/8"-16 x 3/4" flat head socket cap screws, you typically need an Allen wrench or hex key that matches the size of the screw's socket. A torque wrench may also be helpful to apply the correct amount of force without over-tightening. The hex socket allows for a significant transfer of torque, ensuring a secure fit for your applications, from assembling furniture to securing mechanical components.
  • Question: In which applications are these screws commonly used?

    Answer: 3/8"-16 x 3/4" flat head socket cap screws are versatile fasteners used in various applications including machinery, automotive, and furniture assembly. Their flat head design makes them suitable for setups where a flush surface is crucial. They are often found in robotics, framing, as well as DIY projects where a strong hold and aesthetic finish are important.
  • Question: What benefits does using alloy steel provide for these screws?

    Answer: Using alloy steel for the 3/8"-16 x 3/4" flat head socket cap screws offers enhanced tensile strength and corrosion resistance compared to standard steel. The alloy composition provides excellent durability, making them suitable for high-stress environments. When subjected to extreme conditions or significant stresses, these screws retain their integrity better than their non-alloy counterparts, making them ideal for industrial and commercial applications.
  • Question: How do I choose the right length of socket cap screws?

    Answer: Choosing the right length for socket cap screws, such as the 3/8"-16 x 3/4", depends on the thickness of the materials being fastened. It’s essential to consider how much of the screw should engage with the material to ensure a secure fit. For instance, if you are fastening two wood pieces together, the total thickness should be less than the screw length, allowing for sufficient thread engagement without penetrating too deeply.
  • Question: Are these screws compatible with any specific type of nut or fastening system?

    Answer: Yes, the 3/8"-16 x 3/4" flat head socket cap screws are compatible with nuts and threaded holes that have a 3/8"-16 internal thread. This standardization makes it easier to integrate them with various nut types, such as hex or lock nuts. When selecting a nut, ensure that it can accommodate the 16 threads per inch to achieve a proper fit, particularly in mechanical assemblies or equipment.
  • Question: Can I use these screws in outdoor applications?

    Answer: While the 3/8"-16 x 3/4" flat head socket cap screws made from alloy steel are durable, they may require protective coatings for outdoor applications to prevent rust due to exposure to moisture. For outdoor projects, consider using screws with zinc plating or other corrosion-resistant finishes, which enhance their lifespan and reliability in exposed environments, such as decks, outdoor furniture, and fencing.
  • Question: How do I determine the torque specifications for these screws?

    Answer: The torque specifications for 3/8"-16 x 3/4" flat head socket cap screws can typically be found in manufacturer guidelines or engineering handbooks. Proper torque ensures that the screws are fastened sufficiently without risking damage to the materials being fastened. It’s advisable to use a calibrated torque wrench to achieve the recommended settings, particularly in critical applications like machinery to prevent loosening or stripping.
  • Question: What is the difference between a flat head and a button head socket cap screw?

    Answer: The primary difference between flat head and button head socket cap screws lies in their design and application. Flat head socket cap screws, like the 3/8"-16 x 3/4", have a countersunk head that allows for a flush finish when installed. In contrast, button head screws have a rounded head that protrudes above the surface. Flat heads are commonly used when a sleek appearance is needed, whereas button heads are beneficial when more surface area and aesthetic appeal are desired.
  • Question: Where can I buy 3/8"-16 x 3/4" flat head socket cap screws, alloy steel, 100 pack?

    Answer: You can buy 3/8"-16 x 3/4" flat head socket cap screws, alloy steel, 100 pack from Ubuy. As a reliable online retailer, Ubuy offers a wide selection of fasteners and tools, providing an efficient shopping experience tailored to your needs. You'll find various sizes and types to fit your project specifications while enjoying convenience and accessibility.

Newport Fasteners Socket Head Screws Editorial Review

3/8"-16 x 3/4" Flat Head Socket Cap Screws, Alloy Steel, 100 Pack are high-quality fasteners designed for durability and reliability. Made from alloy steel, these screws feature a black oxide finish that provides both aesthetics and corrosion resistance. The fully threaded design ensures a firm grip, while the internal hex drive allows for easy installation with an Allen wrench. Customers appreciate the robust construction and versatility of these screws, making them ideal for various applications. The pack contains 100 screws, which is perfect for both small and large projects, ensuring you have the right fasteners on hand for any job.

Customer Reviews & Ratings

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Pros

  • Durable alloy steel construction
  • Black oxide finish for corrosion resistance
  • Fully threaded for a secure grip
  • Easy installation with internal hex drive
  • Pack of 100 for extensive use

Cons

  • Screw length may not suit every project

Platform Trust & Buyer Confidence

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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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“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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“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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TZS 236885

Order now and get it around Friday, October 02

QTY:

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

  • Designed for flush mounting with an 82-degree countersunk flat head.
  • Provides high strength, perfect for demanding applications.
  • Ideal for tools and dies with moving parts over fastened areas.
  • Crafted from alloy steel with a durable black oxide finish.
  • Coarse, full thread for secure fastening.
  • Recommended hex socket Allen key wrench size is 7/32 inch.

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