EFCO 525 Series - Manual (Page 11)

[FIG. 4]
4479 HEAD
PREP FOR FRAME HEAD.
SECTION III-FABRICATION C - DRILLING TEMPLATE
(STEP 1)
SHEAR BLOCK HORIZONTALS
[FIG. 3]
4479 HEAD
PAGE 9
USE THE INTERIOR & EXTERIOR EDGE AND EACH END OF THE
HEAD TO ALIGN DRILL JIG DJ19. USE .228 DIA. (#I) DRILL AT
DARKENED AREAS ONLY FOR STEP 1.
AFTER STEP 1 IS COMPLETE, PROCEED TO STEP 2.
COUNTERSINK HOLES 82˚ TO .438 DIAMETER.
EXTERIOR
INTERIOR
INTERIOR
EXTERIOR
.625"
1.000"
.625"
1.000"
82˚ CTSK
@ .438 DIA.
(2) EACH END
.625"
1.000"
525 IMPACT
1.000"
.625"
DPS 1/2004
1.000"
1.000"
.625"
.625"
1.000"
1.000"
.625"
.625"