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Ultimate Jfast Ms51957-16b - 4-40x7/16 Ms51957-b Phil Pan M/s Coarse Full Thread 300 Series S/s Dfar Black Ox, Case Quantity: 3,000 Value Pack [0MJDc8VA]

$43.99 $140.99 -69%

JFAST MS51957-16B Mil-Spec Machine Screws Introducing the JFAST MS51957-16B Mil-Spec Machine Screws, a premium-grade fastener designed for high-performance applications. Engineered with precision, these screws are crafted from 18-8 stainless steel a

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Ultimate Jfast Ms51957-16b - 4-40x7/16 Ms51957-b Phil Pan M/s Coarse Full Thread 300 Series S/s Dfar Black Ox, Case Quantity: 3,000 Value Pack [0MJDc8VA]

JFAST MS51957-16B Mil-Spec Machine Screws

Introducing the JFAST MS51957-16B Mil-Spec Machine Screws, a premium-grade fastener designed for high-performance applications. Engineered with precision, these screws are crafted from 18-8 stainless steel and feature a black oxide finish for corrosion resistance. The MS51957-16B model offers a 4-40 thread size, 7/16" length, and a pan head with Phillips drive style. With their robust construction and reliable performance, these screws are perfect for demanding environments.
  • Robust 18-8 stainless steel construction for durability
  • Black oxide finish for corrosion resistance and aesthetics
  • 4-40 thread size and 7/16" length for versatile applications

Product Specifications and Details

The JFAST MS51957-16B Mil-Spec Machine Screws are designed to meet the stringent requirements of military and aerospace industries. They come in a case quantity of 3,000, ensuring you have ample stock for your projects. The MS51957-B specification ensures compliance with DFAR (Defense Federal Acquisition Regulation Supplement) and RoHS (Restriction of Hazardous Substances) standards, making them suitable for critical applications. Key specifications include:
  • Part Number: MS51957-16B
  • Product Category: Mil-Spec Machine Screws
  • Size: 4-40
  • Length: 7/16"
  • Head Style: Pan Head
  • Drive Style: Phillips
  • Material: 18-8 Stainless Steel
  • Finish: Black Oxide
  • Mil Spec Group: MS51957-B

Practical Applications and Benefits

The JFAST MS51957-16B Mil-Spec Machine Screws are ideal for a wide range of applications, including aerospace, automotive, and industrial machinery. Their superior strength and corrosion resistance make them perfect for environments where reliability is paramount. Whether you're assembling components in a high-stress environment or ensuring the longevity of your equipment, these screws deliver the performance you need. With their compliance to DFAR and RoHS standards, they are also suitable for use in sensitive industries. Here are some of the benefits of using these screws:
  • Enhanced durability and strength for heavy-duty applications
  • Corrosion resistance for long-lasting performance
  • Compliance with industry standards for peace of mind

What Our Customers Say

February 1, 2026

Absolutely no complaints!

A great price for a truly, truly, truly great product.

- Gwynedd K..

February 1, 2026

Absolutely no complaints!

A great item. And very, very, very well made.

- Eirian A..

February 1, 2026

Absolutely no complaints!

The best choice that I've made this year.

- Boris B..

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