side opposite to the sidearm in this view the splined locknuts 460 can be seen located as screwed onto the ends of threaded rods 452 and surrounded by tubular housings 458 fig6 is a sectional view through the saddle of fig5 illustrating the relationship of the tubular housing rod and locknut in this view it can be seen how the tubular housing 458 defines an opening for the associated locknut wrench socket to access the locknut 460 while preventing access to the locknut from the side as discussed above the spacing between the housing 458 and locknut 460 should be such that the associated wrench socket fits fairly closely to the interior surface of tubular enclosure 458 making access by other tools less likely the basic relationship of the threaded rods flanges tubular housings and locknuts as described in conjunction with the first embodiment of the invention should be understood to apply to the second and third embodiments of the invention as disclosed below fig7 is a perspective view of the plate and associated rods as illustrated in fig4 a in this view the opening 451 through plate 450 is visible as mounted the tubular enclosure 419 of the valve housing extends through tis opening also visible is the fact that threaded rods 452 are each provided with an outwardly extending curved section this feature may be present wherever the distance between the holes through the flanges is greater than the distance between the.