FEATURES Cosmetic black gloss finish. CONTROL KNOBS, Anti-static plastic. Positive retention 6-32 set screws. MOLDED ABS Fits 1/8 dia. & 1/4 dia. shafts. Functionally rugged. Special designs available. MATERIALS Knob: Custom molded ABS, color black. Inlay: Spun aluminum Threaded Insert: Brass. Setscrew: Heat treated high alloy steel with cup point and hex head, or slotted head. Note: 1 or 2 supplied, depending on model. Notes: Dimensions in inches & (millimeters). Shaft size is last 3 digits of Model No. 41012 SERIES Straight knurl with line indicator on top (Top inlay & line or dot indicators available in color - consult factory.) MODEL A B 410121B1/8 .520 (13.2) .640 (16.3) 410121B1/4 .520 (13.2) .640 (16.3) 410122B1/8 .720 (18.3) .740 (18.8) 410122B1/4 .720 (18.3) .740 (18.8) 410123B1/8 .920 (23.4) .860 (21.8) 410123B1/4 .920 (23.4) .860 (21.8) 41013 SERIES Straight knurl with no indicator marking (Indicator lines and dots available - consult factory.) MODEL A B 410131B1/8 .520 (13.2) .480 (12.2) 410131B1/4 .520 (13.2) .480 (12.2) 410132B1/4 .720 (18.3) .580 (14.7) 410133B1/4 .920 (23.4) .640 (16.3) 43021 SERIES Straight knurl pointer with line indicator on pointer side U MODEL A B C 430211B1/8 .504 (12.8) .480 (12.2) .610 (15.5) 430211B1/4 .504 (12.8) .480 (12.2) .610 (15.5) 430212B1/4 .712 (18.1) .579 (14.7) .750 (19.1) 430213B1/4 .906 (23.0) .642 (16.3) 1.050 (26.7) APEM, 63 Neck Road, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info apem.com U1 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.