3.35 X .91″ 45 DEGREE BT50 RETENTION KNOB (3900-5508) (SKU: 3900-5508)
3.35 X .91″ 45 Degree BT50 Retention Knob
- Made of SNCM 21 alloy steel hardened to HRC 52
- 56°
- All dimensions are in accordance to MAS 403 machine specifications
- L is 3.35″
- L1 is 1.38″
- L2 is .39″
- D is 1.5″
- D1 is .91″
- D2 is .67
- D4 is .98″
- Thread is M24 X 3.0
Specifications
- 3.35 X .91″ 45 Degree BT50 Retention Knob
- Made of SNCM 21 alloy steel hardened to HRC 52~56°.
- All dimensions are in accordance to MAS 403 machine specifications.
- L is 3.35″.
- L1 is 1.38″.
- L2 is .39″.
- D is 1.5″.
- D1 is .91″.
- D2 is .67.
- D4 is .98″.
- Thread is M24 X 3.0.
- Weight: 0.7
- Dimensions: L 3, W 1, H 6
Benefits
- Industrial-grade tooling designed for dependable shop performance.
- Supports consistent results when applied with correct setup practices.
- A practical choice for U.S. machine shops and maintenance work.
Recommended use
- Confirm compatibility (size, interface, machine capacity) before ordering.
- Follow safe operating practices and use appropriate PPE.
- Optimize setup rigidity and process parameters for best results.
USA Warehouse Stock — Fast U.S. fulfillment.






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