Bayou Tactical Socket Set Screw Stainless Steel 4-40 x 5/16" Set Screw 12 pack

Stainless Steel Socket Set Screws

Screw Diameter - Thread Pitch: #4-40 x 5/16" 

#4-40 Stainless Steel Socket Set Screws are a type of screw generally used to secure an object within or against another object. The most common examples are securing a pulley or gear to a shaft. Set screws are most often headless (also called blind), meaning that the screw is fully threaded and has no head projecting past the major diameter of the screw thread. A blind set screw (known in the UK as a grub screw, quite possibly from its figurative resemblance to a soil-dwelling grub) is almost always driven with an internal-wrenching drive, such as a hex socket (Allen) socket The set screw passes through a threaded hole in the outer object and is tightened against the inner object to prevent it from moving relative to the outer object. It exerts compressional or clamping force through the bottom tip that projects through the hole.

An example application is when a set screw is screwed into a pulley hub so that its end-point bears firmly against the shaft. The fastening action is by friction between the screw and the shaft, often (but not always) with some amount of elastic or plastic deformation of one or both.

304 Stainless Steel is the industry standard grade for Stainless Steel Fasteners. 304 Stainless Steel Socket Set Screws are durable, corrosion resistant fasteners and rust resistant in applications exposed to fresh water moisture. For applications that will be in contact with Salt Water moisture 316 Stainless Steel is recommended.

Body Diameter: (#4) Max 0.1120 - Min 0.1075

Thread Pitch: 40 Per Inch (Coarse)

Cup Point Diameter: Max 0.061 - Min 0.051

Point Degree: 118

Thread Direction: Right Hand

Thread Length: Full Thread

Material: 304 Stainless Steel

Allen Key / Hex Bit: 0.050

Product Specifications may vary slightly +/- depending upon production run
within IFI Tolerances