#2-56 Phillips Pan Head SEMS Screws with External Tooth Lock Washers - Zinc Plated Steel

#2-56 Phillips Pan Head SEMS Screws

Machine Screws with Pre-Assembled External Tooth Lock Washers


  • Machine screws with pre-assembled lock washers
  • Features a free-spinning external tooth lock washer beneath the head
  • Single part design saves time and hassle
  • Excellent solution for bulk projects of production lines
  • Zinc plated steel

#2-56 Phillips Pan Head SEMS with External Tooth Lock Washers are essentially a pre-assembled machine screw with lock washer. The lock washer is beneath the head of the screw and is free-spinning. This pre-assembly saves time and hassle on production lines and in any application where a machine screw with lock washer may be necessary, since they do not need to be put together, and there is no need to worry about losing a screw or washer. External Tooth SEMS screws provide greater torsional resistance than internal tooth lock washers. Because of the integrated lock washer, SEMS screws are often referred to as lock screws, or locking screws.

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Product Specifications
ASME
B 1.1
Class
2A
Diameter
#2
Drive Style
Phillips
Finish
Zinc Plated
Grade
AISI 1022
Hardness
Rockwell B70 - B100
Head Diameter
Max 0.167 - Min 0.155
Head Height
Max 0.062 - Min 0.053
Head Style
Pan
Material
Steel
Phillips Drive
#1
Product Type
SEMS Machine Screw
Standards Met
ASME B1.1, ASME B18.13, ASME B18.6.3
System of Measurement (Unit)
Inch
Thread Diameter Major
#2 (Max 0.0854 - Min 0.0813)
Thread Diameter Minor
#2 (Max 0.0738 - Min 0.0717)
Thread Direction
Right Hand
Thread Pitch (Count)
56 Per Inch
Thread Standard
UNC
Thread Type
Coarse
Tolerance (IFI)
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
Washer OD
(Max 0.180 - Min 0.170)
Washer Thickness
(Max 0.016 - Min 0.010)