The external hex drive allows high torque transmission, but can fail quickly due to weaknesses 60° inherent in its drive design. angle
capabilities and low head height, external TORX PLUS® low-profile head fasteners are the ideal choice. They are engineered to provide improved performance over hex drive fasteners without added head volume.
External TORX PLUS low-profile head fasteners are engineered to provide optimal torque transfer and extended tool life, with a head height similar to hex or pan head fasteners.
AND
STRENGTH
External Hex Drive
contact points round off from driving pressure
points of contact cause stress risers to develop
TORX PLUS Drive 0° drive angle
F EATURES • Hex flange head or pan head bearing surface
lobe engagement
broad contact surface
• 0° drive angle
S TANDARD D ESIGN G UIDELINES
• Lobe engagement spreads forces over large area to prevent stress risers and tool and fastener damage
Fastener Sizes: M0.6 to M24 (#0000 to 1")
• Higher torque transfer capability than internal recesses
Drive System: External TORX PLUS Drive
• Drive system strength 5 to 6 times greater than corresponding seating torque
Head Styles: Dome or indented head with hex flange or pan head bearing surface Thread Styles: Can be used with any thread style
For more information on how external TORX PLUS low-profile head fasteners can benefit your assembly, please contact:
• Head height is similar to hex or pan head fasteners
External TORX PLUS Low-Profile Head
Hex Head
Pan Head
• Lower head volume (weight) than hex and pan head fasteners (18% and 41% respectively)
B ENEFITS • Ensures optimal torque transmission and clamp load • Allows high torque transfer without damage to fastener • Ideal drive system for applications that require high strength and torque capability in a low-profile head
• Minimizes space required to accommodate head height • Excellent high-torque drive system for miniature fasteners • Reduced wear on drive tools for extended tool life
TORX PLUS® is a registered trademark of Camcar Textron.
EXTERNAL TORX PLUS® LOW-PROFILE HEAD
HEAD HEIGHT
AND
V O L U M E C O M PA R I S O N
7.52 mm
6.80 mm 4.12 mm
4.26 mm
4.45 mm
4.00 mm
DRIVE SYSTEM
External TORX PLUS Drive
External TORX PLUS Drive
Internal TORX PLUS Drive
External Hex Drive
External Hex Drive
External TORX PLUS Drive
HEAD STYLE
Low-Profile Head
Low-Profile Flange Head
Pan Head
Indented Hex Head
Indented Hex Flange Head
Flange Head
HEAD HEIGHT RATIO
1.00
1.03
1.08
0.97
1.65
1.83
HEAD VOLUME (WEIGHT) RATIO
1.00
1.15
1.41
1.18
1.88
1.64
EXTERNAL TORX PLUS LOW-PROFILE HEAD FASTENERS S TA N D A R D D R I V E S I Z E S E L E C T I O N T A B L E DRIVE SIZE H7EP H4EP H3EP H2EP 1EP 2EP 4EP 5EP 6EP 7EP 8EP 10EP 12EP 14EP 16EP 18EP 20EP 22EP 24EP 26EP 30EP 32EP 36EP 40EP 42EP
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