Precision Components
Metric Face Mill / Shell Mill Extensions
Metric Face Mill / Shell Mill Extensions
Select the desired dimension based on the technical drawing.
SKU:CAT-50-16MMFMX-4
Regular price
$497.00 USD
Regular price
Sale price
$497.00 USD
Unit price
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1-800-525-1373
Precision Components’ METRIC Face Mill / Shell Mill Extensions allow milling of hard to reach areas while maintaining rigidity at extended lengths. 4” through 12” reach available.
- Hardened
- Precision Ground
- American Made
Available in Dual Contact - (DC)
Includes Keys

Specifications
| PART NUMBER | P | K | TAPPED HOLE | R | TAPER | B | FMS |
|---|---|---|---|---|---|---|---|
| CAT-40-16MMFMX-4 | 16MM | 8MM | 5/16-24 | 4.00 | CAT-40 | 34MM | SHCS 5/16-24 |
| CAT-40-16MMFMX-6 | 16MM | 8MM | 5/16-24 | 6.00 | CAT-40 | 34MM | SHCS 5/16-24 |
| CAT-40-16MMFMX-9 | 16MM | 8MM | 5/16-24 | 9.00 | CAT-40 | 34MM | SHCS 5/16-24 |
| CAT-40-22MMFMX-4 | 22MM | 10MM | 3/8-24 | 4.00 | CAT-40 | 44MM | FMS 3/8-24 |
| CAT-40-22MMFMX-6 | 22MM | 10MM | 3/8-24 | 6.00 | CAT-40 | 44MM | FMS 3/8-24 |
| CAT-40-22MMFMX-9 | 22MM | 10MM | 3/8-24 | 9.00 | CAT-40 | 44MM | FMS 3/8-24 |
| CAT-40-27MMFMX-4 | 27MM | 12MM | 1/2-20 | 4.00 | CAT-40 | 53MM | FMS 1/2-20 |
| CAT-40-27MMFMX-6 | 27MM | 12MM | 1/2-20 | 6.00 | CAT-40 | 53MM | FMS 1/2-20 |
| CAT-40-27MMFMX-9 | 27MM | 12MM | 1/2-20 | 9.00 | CAT-40 | 53MM | FMS 1/2-20 |
| PART NUMBER | P | K | TAPPED HOLE | R | TAPER | B | FMS |
| BT-40-16MMFMX-4 | 16MM | 8MM | 5/16-24 | 4.00 | BT-40 | 34MM | SHCS 5/16-24 |
| BT-40-16MMFMX-6 | 16MM | 8MM | 5/16-24 | 6.00 | BT-40 | 34MM | SHCS 5/16-24 |
| BT-40-16MMFMX-9 | 16MM | 8MM | 5/16-24 | 9.00 | BT-40 | 34MM | SHCS 5/16-24 |
| BT-40-22MMFMX-4 | 22MM | 10MM | 3/8-24 | 4.00 | BT-40 | 44MM | FMS 3/8-24 |
| BT-40-22MMFMX-6 | 22MM | 10MM | 3/8-24 | 6.00 | BT-40 | 44MM | FMS 3/8-24 |
| BT-40-22MMFMX-9 | 22MM | 10MM | 3/8-24 | 9.00 | BT-40 | 44MM | FMS 3/8-24 |
| BT-40-27MMFMX-4 | 27MM | 12MM | 1/2-20 | 4.00 | BT-40 | 53MM | FMS 1/2-20 |
| BT-40-27MMFMX-6 | 27MM | 12MM | 1/2-20 | 6.00 | BT-40 | 53MM | FMS 1/2-20 |
| BT-40-27MMFMX-9 | 27MM | 12MM | 1/2-20 | 9.00 | BT-40 | 53MM | FMS 1/2-20 |
| PART NUMBER | P | K | TAPPED HOLE | R | TAPER | B | FMS |
| CAT-50-16MMFMX-4 | 16MM | 8MM | 5/16-24 | 4.00 | CAT-50 | 34MM | SHCS 5/16-24 |
| CAT-50-16MMFMX-6 | 16MM | 8MM | 5/16-24 | 6.00 | CAT-50 | 34MM | SHCS 5/16-24 |
| CAT-50-16MMFMX-9 | 16MM | 8MM | 5/16-24 | 9.00 | CAT-50 | 34MM | SHCS 5/16-24 |
| CAT-50-16MMFMX-12 | 16MM | 8MM | 5/16-24 | 12.00 | CAT-50 | 34MM | SHCS 5/16-24 |
| CAT-50-22MMFMX-4 | 22MM | 10MM | 3/8-24 | 4.00 | CAT-50 | 44MM | FMS 3/8-24 |
| CAT-50-22MMFMX-6 | 22MM | 10MM | 3/8-24 | 6.00 | CAT-50 | 44MM | FMS 3/8-24 |
| CAT-50-22MMFMX-9 | 22MM | 10MM | 3/8-24 | 9.00 | CAT-50 | 44MM | FMS 3/8-24 |
| CAT-50-22MMFMX-12 | 22MM | 10MM | 3/8-24 | 12.00 | CAT-50 | 44MM | FMS 3/8-24 |
| CAT-50-27MMFMX-5 | 27MM | 12MM | 1/2-20 | 5.00 | CAT-50 | 53MM | FMS 1/2-20 |
| CAT-50-27MMFMX-7 | 27MM | 12MM | 1/2-20 | 7.00 | CAT-50 | 53MM | FMS 1/2-20 |
| CAT-50-27MMFMX-10 | 27MM | 12MM | 1/2-20 | 10.00 | CAT-50 | 53MM | FMS 1/2-20 |
| CAT-50-27MMFMX-12 | 27MM | 12MM | 1/2-20 | 12.00 | CAT-50 | 53MM | FMS 1/2-20 |
| PART NUMBER | P | K | TAPPED HOLE | R | TAPER | B | FMS |
| BT-50-16MMFMX-4 | 16MM | 8MM | 5/16-24 | 4.00 | BT-50 | 34MM | SHCS 5/16-24 |
| BT-50-16MMFMX-6 | 16MM | 8MM | 5/16-24 | 6.00 | BT-50 | 34MM | SHCS 5/16-24 |
| BT-50-16MMFMX-9 | 16MM | 8MM | 5/16-24 | 9.00 | BT-50 | 34MM | SHCS 5/16-24 |
| BT-50-22MMFMX-4 | 22MM | 10MM | 3/8-24 | 4.00 | BT-50 | 44MM | FMS 3/8-24 |
| BT-50-22MMFMX-6 | 22MM | 10MM | 3/8-24 | 6.00 | BT-50 | 44MM | FMS 3/8-24 |
| BT-50-22MMFMX-9 | 22MM | 10MM | 3/8-24 | 9.00 | BT-50 | 44MM | FMS 3/8-24 |
| BT-50-27MMFMX-5 | 27MM | 12MM | 1/2-20 | 5.00 | BT-50 | 53MM | FMS 1/2-20 |
| BT-50-27MMFMX-7 | 27MM | 12MM | 1/2-20 | 7.00 | BT-50 | 53MM | FMS 1/2-20 |
| BT-50-27MMFMX-10 | 27MM | 12MM | 1/2-20 | 10.00 | BT-50 | 53MM | FMS 1/2-20 |
| BT-50-27MMFMX-12 | 27MM | 12MM | 1/2-20 | 12.00 | BT-50 | 53MM | FMS 1/2-20 |
| PART NUMBER | P | K | TAPPED HOLE | R | TAPER | B | FMS |
| NMTB-50-16MMFMX-4 | 16MM | 8MM | 5/16-24 | 4.00 | NMTB-50 | 34MM | SHCS 5/16-24 |
| NMTB-50-16MMFMX-6 | 16MM | 8MM | 5/16-24 | 6.00 | NMTB-50 | 34MM | SHCS 5/16-24 |
| NMTB-50-16MMFMX-9 | 16MM | 8MM | 5/16-24 | 9.00 | NMTB-50 | 34MM | SHCS 5/16-24 |
| NMTB-50-22MMFMX-4 | 22MM | 10MM | 3/8-24 | 4.00 | NMTB-50 | 44MM | FMS 3/8-24 |
| NMTB-50-22MMFMX-6 | 22MM | 10MM | 3/8-24 | 6.00 | NMTB-50 | 44MM | FMS 3/8-24 |
| NMTB-50-22MMFMX-9 | 22MM | 10MM | 3/8-24 | 9.00 | NMTB-50 | 44MM | FMS 3/8-24 |
| NMTB-50-27MMFMX-5 | 27MM | 12MM | 1/2-20 | 5.00 | NMTB-50 | 53MM | FMS 1/2-20 |
| NMTB-50-27MMFMX-7 | 27MM | 12MM | 1/2-20 | 7.00 | NMTB-50 | 53MM | FMS 1/2-20 |
| NMTB-50-27MMFMX-10 | 27MM | 12MM | 1/2-20 | 10.00 | NMTB-50 | 53MM | FMS 1/2-20 |
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