What it is
MS20020 internal wrenching bolt, 160 ksi Ftu (MS20004 THRU MS20024), Internal wrenching (hex socket) head, 1-1/4-12 UNJF-3A, shank (A dia) 1.249-1.246", grip 5.125" (±.010), length 6.750" (±.015) (MS20004E THRU 20024E page 3, Table II)
Equivalents
No equivalent on file: no maker document names one and the government catalog lists none on its stock number.
Install tooling, by who made the part
Not documented for this part number. Ask a tooling specialist →

Reference only: the drawing and its process spec govern. How to read this

Full detail: decode, cited documents, every stock number
MS20020-82 | SpecLok