Retention Knobs: Standard BT Flange Retention Knobs Per MAS-403 TYPE I, II, III

• SPI Retention Knobs are made in U.S.A. to exact manufacturing standards.
• Standard BT Flange MAS-403 type I, II, and III offered as listed below.
• Modified standard Retention Knobs per ISO or DIN and most of the popular manufacturers special knobs are also readily available. However, since certain manufacturers use a variety of modified knobs for their different machine models, these Retention Knobs need to be identified first by our technical staff. We suggest you submit the following information with your inquiry or purchase order.

• Machine Builder and Machine Model.
• Type of flange: ANSI-V, BT, ISO, DIN
• Size of taper: 30, 35, 40, 45, 50
• Critical dimensions: D, N, P, S and thread
• Type I-45, II-60, III-90, per sketch