Schematic of the Steinway Model M Grand Piano 
2 - Keyframe
29 - Support Cushion
51 - Underlever Frame Cushion
6 - Balance Rail
30 - Fly or jack
52 - Underlever Flange
7 - Balance Rail Stud
31 - Tender
53 - Underlever
8 - Balance Rain Pin
32 - Fly Regulating Screw
53A - Underlever Lead
9 - Balance Rail Bearing
33 - Spoon
54 - Underlever Top Flange
9A - Balance Rail Bearing Strip
34 - Support Top Flange
55 - Damper Wire Screw
10 - Back Rail
35 - Balancier
56 - Tab
11 - Back Rail Cloth
36 - Balancier Regulating Screw
57 - Damper Stop Rail
12 - Key Stop Rail Prop
37 - Repetition Spring
57 - Damper Stop Rail
13 - Key Stop Rail
38 - Repetition Felt Block
58 - Damper wire
14 - Dag
39 - Balancier Covering
59 - Damper Guide Rail
15 - Key
40 - Hammer Rest
60 - Damper Head
19 - Key Button
41 - Regulating Rail
61 - Damper Felts
20 - Balance Pin Bushing
42 - Letoff Screw
62 - String
21 - Capstan Screw
43 - Hammer Rail
62A - String Rest Felt
22 - Backcheck
44 - Hammershank Flange
63 - Agraffe
23 - Backcheck Wire
45 - Drop Screw
64 - Tuning Pins
24 - Underlever Key Cushion
46 - Hammershank
65 - Sostenuto Rod
25 - Action Hanger
47 - Knuckle
66 - Sostenuto Bracket
26 - Support Rail
48 - Hammer
70 - Case Cornice or Stretcher
27 - Support Flange
49 - Underlever Frame
71 - Wrestplank or Pinblock
28 - Support
50 - Underlever Frame Spring
83 - Front Rail
50A - Underlever Frame Spring Punching
84 - Crossblock Spruce
85 - Crossblock Block