TWE-4 Apex Tri-Wing Insert Bits

Drive Type: Hex Insert

Point Style: Tri-Wing

Drive Size: 5/16''

Point Size: #4

Overall Length: 1'' / 25mm

Screw Size Tension Head: 8-32

Screw Size Shear Head: 10-32

Apex UPC Code: 69709913234

Apex® Tri-Wing bits also known as triangular slotted bits, feature a screw drive with three slotted ''wings'' and a small triangular hole in the center of the bit's tip. The design was original developed by engineers in the aerospace industry, most notably by Lockheed and McDonnell Douglas, in the early 1970s. McDonnell Douglas used Tri-Wing bits as their primary fastener on commercial aircraft. In the present day it is usually used on electronics equipment.

A variation has the three "wings" joined in the center, but with no triangular hole. It is commonly used on Nintendo products. Some Nokia Phone chargers use tri-wing screws. Apple uses this on the 2010 and 2011 Macbook Pro battery access - Y1 size. Microsoft's Zune also uses this type on some models. Nikon also uses this type of screws on some equipment like the SB-700 flash.

Apex® Tri-Wing bits are made in the USA with the highest quality steel ensuring a long life in the toughest workplace environments. Omega Technologies offers quantity discounts on Apex® Tri-Wing bits!