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HAAS RETENTION KNOBS CAT 50(1"-8 THD.) KNOBS WITH 75DEG. ANGLE
FADAL RETENTION KNOBS BT 40(M16-2.00) KNOBS WITH 45DEG. ANGLE
MORI SEIKI RETENTION KNOBS BT 40(M16-2.00) KNOBS WITH 60DEG. ANGLE
CAT 40(5/8-11THD.) KNOBS WITH 45DEG. ANGLE BT 40(M16-2.00) KNOBS WITH 90DEG. ANGLE
CAT 40(5/8-11THD.) KNOBS WITH 60DEG. ANGLE BT 40(M16-2.00) KNOBS WITH 75DEG. ANGLE
CAT 40(5/8-11THD.) KNOBS WITH 90DEG. ANGLE BT 50 KNOBS WITH 45DEG. ANGLE
CAT 40(5/8-11THD.) KNOBS WITH 75DEG. ANGLE BT 50 KNOBS WITH 60DEG. ANGLE
CAT 50(1"-8 THD.) KNOBS WITH 45DEG. ANGLE BT 50 KNOBS WITH 90DEG. ANGLE
CAT 50(1"-8 THD.) KNOBS WITH 60DEG. ANGLE RETENTION KNOB SOCKETS
CAT 50(1"-8 THD.) KNOBS WITH 90DEG. ANGLE

Why Choose USST™ Retention Knobs?

• Each retention knob is certified free of cracks after being INDIVIDUALLY Magnetic Particle Tested by an Independent Nationally Certified Laboratory in the U.S. to ensure knob integrity (ASTM E1444-01)
• Manufacturing date, batch number and part number are all clearly laser marked on each retention knob
• Knobs are made to applicable standards (ANSI, JMTBA, DIN)
• Pilots now standard on a majority of CAT & BT Taper knobs for better seating and improved concentricity
• Coolant holes are left non-carburized
• Made from 8620, heat-treated to RC 56/58
• Stronger threads resulting from thread rolling on a vast majority of the knobs
• High quality black oxide treatment to ensure long life
• Made in USA