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Stainless Steel Machine Screw, Flat Head, Phillips Drive, #4-40, 3/8" Length (Pack of 10)

1 customer review

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Specifications for this item
Brand Name Small Parts
Part Number B001PH3J96
Material Type Stainless Steel
Exterior Finish Plain
System of Measurement Inch
Color Silver
Thread Style Right Hand
Head Angle 82  Degrees
Overall Length 3/8  inches
Size #4-40
Thread Size #4-40
Drive Style Phillips
Head Style Flat
Number of Items 10
UNSPSC Code 31161504

Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped... Read full product description

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Product Features

  • Machine Screws are often used with nuts or driven into tapped holes
  • Stainless Steel is suitable where formability and cost are important considerations
  • Flat head style allows fastener to sit flush to the surface
  • Phillips drive is designed to cam out under too much torque
  • Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads

Product Details

  • Shipping Weight: 0.8 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B001PH3J96
  • Average Customer Review: 5.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #790,566 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
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Product Description

Machine Screws, also referred to as Machine Bolts, are often used with nuts or driven into tapped holes. They come in a variety of head types and drive styles, but are generally available in smaller sizes.

Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness.  These properties account for their extremely wide use in practically every industry. Austenitic Stainless Steels are alloys of iron and carbon that contain between 16% and 30% Chromium, a maximum of 0.15% carbon, along with Nickel (or Manganese), and other alloying elements.  The chromium, which helps develop a passive surface oxide film, provides corrosion resistance in stainless steels.   Austenitic Stainless Steels are designated by a 3 digit SAE Stainless Steel Grade beginning with the number 3 (e.g. 304, 316).  Another common naming convention for Austenitic Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to the % of Chromium and 8 to the % of Nickel contained in the material.    

Flat head fasteners are designed to fit flush to the surface when used with countersunk holes. Length is measured from the top of the head. The Phillips drive style was originally designed so that the driver would slip out under extreme torque, preventing over-tightening and damage to the fastener or the material.

A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.

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Most Helpful Customer Reviews

Verified Purchase
These screws fit perfectly and are working just fine. The stainless steel is non-magnetic, which I needed for my application.
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