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Unit of Measure

Thread Size

 N/A .086-56 (#2-56)

Thread Code

 N/A 256

Length Code

 N/A 090
Style1 N/A #1
Min. Sheet Thickness2 N/A .025 in

Hole Size in Sheet + .003 - .000

 N/A .166 in

C + .000 - .005

 N/A .165 in TSO4_Dwgs.jpg

F - Min. Thread Depth

 N/A .200 in

H - Nom.

 N/A .187 in
L - Length ± .0033 N/A .090 in

Min. Dist. Hole C/L to Edge

 N/A .23 in
For Use in Sheet Hardness4 N/A HRB 88 / HB 183 or Less

Thread Specification

 N/A Internal, ANSI B1.1, 2B

Fastener Material

 N/A Heat treated 400 Series Stainless Steel

Standard Finish

 N/A Electroless Nickel over Copper over Nickel strike per ASTM B733
  • 1 Style #1 - Thru-threaded.
    Style #2 - Screw might not pass through unthreaded end. Tapped to minimum full thread depth shown. Incomplete threads on tap may allow screw to pass through.
    Style #3 - Blind.
  • 2 For maximum performance, we recommend that you use the maximum shank length for your sheet thickness.
  • 3 Available in other lengths on special order.
  • 4 HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.