We have 5 major HIJI WAZA elbow locks and five major TEBUKI WAZA wrist locks we practice in STMA.
Hiji - elbow:
ikkyo - oshi taoshi - straight arm bar push down
ude gaeshi - figure four arm twist
hiki taoshi - inside arm bar push down
ude hineri - branch up arm twist
waki gatame - arm bar
tebuki - wrist:
kote gaeshi - wrist twist - supination
kote hineri - wrist turn - pronation
nikyo - hon gyaku - bent arm wrist bend
tenkai kote gaeshi
tenkai kote hineri - into sankyo, then hiki taoshi
sankyo - a variation on kote hineri
Shioda Shihan 10th Dan Aikido lists 160 techniques in his texts, though it must be said that many of these are just very subtle variations.
He lists 10 variations of ikkyo alone. However 5 of these are individual waza in their own right. The same applies to the first three forms of nikyo.
So it is fair to say there are 100 locks in Jujutsu, just as there are 100 throws.
That makes 200 techniques to learn from standing grappling!