Spanner Slot Dimensions
Spanner Screws
Spanner Slot Dimensions Calculator
Tamper Resistant Screws with a 'Snake Eye' Drive
Tamper Proof Spanner or 'Snake Eye' security screws are installed using a spanner bit. Snake Eye Screws are commonly referred to as 'Snake Eye' because of the two dot drive system. Security screws are used for securing materials from being tampered with, such as gutters, license plates, grills in jails, schools, boats and cars. They are also used in food prep and processing areas. You will often see security screws used in bathroom stalls and other public locations. Spanner screws can only be installed or removed with a specialized bit, which fits a pin into each of the screw's two drive holes. Since Snake Eye screws can only be installed or removed with these bits, they are very resistant to tampering.
Tamper proof security screws, or Tamper resistant security screws, are distinguished by having an unconventional drive, making tampering with the screw more difficult, if not impossible without the matching driver. Security Screws are used for securing materials from being tampered with. Security screws in this selection are grade 18-8 or higher stainless steel, which prevents rusting and is corrosion resistant.
Standard Locknut LLC N06 N Series Bearing Lock Nut - 1.173-18 in Thread Size, 1-3/4 in OD, 1-1/2 in Face Dia., 13/32 in Width, Steel. The series SFZ locknut is designed with three locking inserts (pegs) that intersect the bore with an angle of 30o. This series is produced with tolerance class ISO 4H machined threads and is available in sizes 10 to 200 mm bore. Assembly: Slots; Thread Direction: Right Hand Thread. (optional feature); Left Hand Thread. Item # Description Size Overall Length; 92563: Spanner Insert Bit #4: 1' 92565: Spanner Insert Bit #6: 1' 92567: Spanner Insert Bit #8: 1' 92569: Spanner Insert Bit #10.
FREE BIT INCLUDED WITH PURCHASE OF 25, 100, 250 or 1,000 PACKS OF SECURITY FASTENERS.
Spanner Slot Dimensions Explained
For more information on fastener types, grades, and materials, please visit our Fasteners 101 page