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  • Material - 4037 Alloy Steel heat treat to HRC 36/40
  • Thread - Witworth form 55 British Standard Taper Pipe
  • Taper 16:1 (3/4 in Taper per Foot)
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Item #

Size & Pitch

B
Overall Length

C
Hex, Across Flats

D
Nominal Diameter, Ref.

E
Socket Depth, Min.

N/A 1/8"-28 N/A 0.385/0.365 N/A 0.193/0.186 N/A 0.390 N/A 0.183
N/A 1/4"-19 N/A 0.510/0.490 N/A 0.255/0.250 N/A 0.530 N/A 0.245
N/A 3/8"-19 N/A 0.573/0.553 N/A 0.318/0.313 N/A 0.670 N/A 0.267
N/A 1/2"-14 N/A 0.697/0.677 N/A 0.380/0.375 N/A 0.840 N/A 0.339
N/A 3/4"-14 N/A 0.822/0.802 N/A 0.568/0.563 N/A 1.060 N/A 0.370
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