PART NO.  SPL.PAGE  DESCRIPTION                                                           
AHH5195   15.M.3    Stud for 4-way piece to side-member
AHH5195   16.M.5    Stud - 4-way piece to side-member -(hyd.pipes+fittings, std.model
    1600 and 1600-MK-II) -changed to FHS0411
AHH5875   16.M.6    Stud for 5-way connection -(hyd.pipes+fittings, ARDB model 1600 and
    1600-MK-II) Com.(C)91240
AHH5875   TC.M.2    Stud for 5-way connection -(hyd.pipes+fittings, Twin Cam)
FHS0411   16.M.5    Stud - 4-way piece to side member -(hyd.pipes +fittings, 1600 and
    1600-MK-II) -was AHH5195

FHS0411 - Stud --4-way piece to side-member (all MGA)
Length:1-3/8"
Top end thread 1/4-28-UNF x 1/2"
Bottom end thread: 1/4-28-UNF x 3/8"

High Strength Stud

Alternate part numbers:
AHH5195, AHH5875, FHS0411

Note:
This stud is item number 19 in the illustration at right, used to secure the brake circuit 5-way fitting to the chssis side member. MGA 1500, 1600, and 1600-MK-II cars have the brake light pressure switch with tapered pipe thread in the top port. MGA Twin Cam and ARDB models have the pressure switch with tapered pipe thread in the inboard side port (different brass fittings). There are three different part numbers for this stud, all interchangeable. FHS0401 is the later standardized part nunmber. Picture of the stand alone stud here is close but not exact configuration.