the assembly seen in fig1 includes a vehicle dash mounted radio 10 ( toyota , for example ) having tuning ( station selection and volume control ) shafts 11 and 12 projecting forwardly from the chassis 13 , and at opposite ends of instruments 14 contained in a reduced size rectangular sub - housing 15 . the radio normally has a removable face plate 16 provided with shaft - passing openings 17 and 18 . in accordance with the invention , a box - like , molded plastic housing or frame 20 is provided , and is rearwardly open for reception into the frame of the forward extent of chassis 13 . the frame has wall means including upright relatively thin end walls 21 and 22 , top and bottom walls 23 and 24 , and a main front panel 25 interconnecting the walls 21 - 24 , by integral molding to the forward ends of such walls . see panel 25 in fig1 and 12 . extending the description to fig1 , the front panel 25 has a narrow , horizontally elongated step shoulder 26 below and forwardly of an upright front face 27 . a sub - panel 28 fits in the space directly above the shoulder 26 and directly forward of the front face 27 , the sub - panel extending lengthwise to sub - tend the forward edges of end walls 21 and 22 . the width of the sub - panel equals the width of shoulder 26 so that it together with the frame form a block shape . the housing also includes plastic break - away means , such as thin sub - walls 31 and 32 integral with the housing and associated with the front panel . the sub - walls are located directly rearwardly of the sub - panel . the thin sub - walls form through openings 31a and 32a in registration with through openings 28a and 28b , in sub - panel 28 and also in registration with face plate openings 17 and 18 for passing the tuning shafts 11 and 12 . fig1 shows sub - panel 28 held in position against the sub - walls 31 and 32 as by the face plate 16 . the latter is in turn clamped rightwardly by the nuts 34 threaded on shafts 11 and 12 ; and a tuning knob 37 presses on the end of a rotary inner shaft 11a passing through outer shaft 11 to a variable impedance ( such as a variable capacitor ) within chassis 13 . the front face of sub - panel 28 is then flush with the front surface 25a of the main front panel , below sub - panel 28 . the break - away means such as sub - walls 31 and 32 are shown as broken away along edges 31b and 32b , in fig2 whereby the front opening in the main front panel is enlarged as at 39 &# 39 ;. ( the opening is reduced at 39 in fig1 to fittingly accept the sub - housing 15 of chassis 13 ). relieved upper and lower edges 150 and 151 of each sub - wall assist such break - away . in fig2 the enlarged opening fittingly accepts or registers with the larger chassis 40 of a din radio 41 . also , the din radio chassis typically projects through opening 39 &# 39 ; and over the ledge or step shoulder 26 ; and sub - panel 28 is then not employed , i . e . it is removed along with break - out walls 31 and 32 . a din radio panel or plate is then substituted for 28 . fig3 shows the edge outline at 44 - 46 of the din radio chassis 40 as related to the break - out wall 32 , looking forwardly relative to housing 13 , and prior to break - out of those walls or sub - panels 31 and 32 . the thin plastic sub - panels have certain relieved edges 150 and 151 proximate but spaced from the frame walls , and other edges 152 - 154 integral with the frame . the front panel 25 also defines a generally rectangular through ( access ) opening 49 for registration with an auxiliary frame . in fig5 and 10 the auxiliary frame comprises a pocket or receptacle 50 which opens frontwardly at 51 , so as to be manually accessible at 53 to the user , for storage of small articles ( keys , pencils , etc .) at 52 . a fastener or fasteners 54 project through openings 55 in the housing end walls and into openings 56 in the walls at 57 of the receptacle 50 , to retain it in position . note peripheral flange 58 at the interior mouth of the receptacle to seat against the panel 25 . alternatively , and as seen in fig4 an equalizer chassis 60 registers with opening 49 , and the front ( instrument ) face 61 of that chassis may project into or through the rectangular access opening 49 . again , fasteners extend through openings in the frame end walls and into openings 63 in the side walls of chassis 60 , to retain it in position . such fastener comprises tightenable , threaded fasteners . fig7 and 8 shows the provision of an l - shaped bracket 70 usable to connect the frame or housing 20 to the dash structure . bracket leg 71 is adjustably attachable to end wall 22 , and to the chassis 13 , as via one of the openings 72 - 101a in that wall , adjustably registrable with one of the through openings 76 - 80 in leg 71 . a stud or threaded fastener 88 attaches through the registered openings . as seen in fig9 b , the fasteners 88 typically have axially extending ribs 89 on heads 89a and which press into the end walls , upon tightening of nuts 89b to prevent or block fastener rotation . end walls 21 and 22 typically have thickness less than 1 / 16 inch , such fastener ribs being effective despite such extreme thinness of the walls . leg 72 of the bracket attaches via a fastener and opening 81 , to dash structure . a similar bracket is employed at the opposite end of the housing , i . e . next to wall 21 . fig7 and 9a show the endwise guidance of such a bracket leg 71 by forwardly and rearwardly extending rail 90 projecting outwardly form the end wall 22 of the housing . an elongated groove 91 sunk in leg 71 closely receive that guide rail . such a rail also prevents twisting of the bracket leg 71 , under torque load , relative to the housing . fig1 a and 11b show fastener 120 attachment of wall 22 to chassis 13 . leg 71 is broken away in fig1 b . fig1 and 13 are more detailed views of the housing or frame 20 ; and fig1 shows the location of openings in the end wall 22 for reception of fasteners . ribs or rails 95 - 101 extend outwardly from the end walls 21 and 22 and toward corresponding openings 95a - 101a . bracket legs like leg 71 are adapted to interfit such ribs , in the same manner as described above for leg 71 and rib 90 , to prevent twisting of such brackets . the brackets used are different , for different vehicle models having different dash structure configuration to which bracket legs ( such as leg 72 ) attach . the different holes 95a - 101a correspond such different brackets used for different vehicles . fig1 a and 14b show an l - shaped bracket 110 having legs 110a and 110b fitting the upper corner 111 of the frame . leg 110a is grooved at 112 to closely fit guide ( and twist resisting ) rib 112a on the top wall 23 , and leg 110b is grooved at 113 to span and closely fit guide ( and twist resisting ) rib 90 and 95 on the side wall 21 . the bracket may be shifted forwardly ( in arrow direction 114 ) until an opening in the leg 110a registers over a corresponding opening on top wall 23 , and a fastener 115 may then be attached in the same manner as shown in fig9 b . nut 117 tightens down on the threaded shank of the fastener and a ribbed nut ( like nut 89a ) enters and attaches to the inner side of wall 23 , as in fig9 b . a flange 120 intergral with leg 110b projects outwardly for attachment to representative dash structure indicated at 121 in fig1 a , as via a fastener 122 , and openings 123 and 124 , as shown . all parts , except the fasteners , typically consists of molded plastic material .