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About Countersinks
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Choose the right countersink angle, body diameter, and number of flutes for your application.
Fluteless Smooth-Finish Countersinks for Screws
High-Speed Steel
 |
0 Flutes |
Dia. | Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | |||||||||
82° Countersink Angle | |||||||||
| 5/32" to 13/32" | 7/16" | 1/4" | 1 21/32" | Round | Republic Drill | 2739A32 | 000000 | ||
| 3/16" to 17/32" | 9/16" | 1/4" | 1 7/8" | Round | Republic Drill | 2739A33 | 00000 | ||
| 5/16" to 25/32" | 13/16" | 1/4" | 2 1/8" | Round | Republic Drill | 2739A44 | 00000 | ||
| 5/16" to 25/32" | 13/16" | 1/2" | 2 5/8" | Round | Republic Drill | 2739A34 | 00000 | ||
| 7/16" to 7/8" | 15/16" | 1/2" | 2 19/32" | Round | Republic Drill | 2739A45 | 00000 | ||
| 9/16" to 1 1/16" | 1 1/8" | 1/2" | 2 29/32" | Round | Republic Drill | 2739A35 | 00000 | ||
| 5/8" to 1 15/32" | 1 1/2" | 1/2" | 2 7/8" | Round | Republic Drill | 2739A46 | 000000 | ||
| 3/4" to 1 3/4" | 1 3/4" | 5/8" | 3 1/8" | Round | Republic Drill | 2739A47 | 000000 | ||
| 1" to 2" | 2 1/8" | 5/8" | 3 1/2" | Round | Republic Drill | 2739A48 | 000000 | ||
| 1 1/4" to 2 1/2" | 2 5/8" | 3/4" | 3 7/8" | Round | Republic Drill | 2739A49 | 000000 | ||
90° Countersink Angle | |||||||||
| 5/32" to 13/32" | 7/16" | 1/4" | 1 21/32" | Round | Republic Drill | 2739A37 | 00000 | ||
| 3/16" to 17/32" | 9/16" | 1/4" | 1 7/8" | Round | Republic Drill | 2739A38 | 00000 | ||
| 5/16" to 25/32" | 13/16" | 1/4" | 2 1/8" | Round | Republic Drill | 2739A81 | 00000 | ||
| 5/16" to 25/32" | 13/16" | 1/2" | 2 5/8" | Round | Republic Drill | 2739A39 | 00000 | ||
| 9/16" to 1 1/16" | 1 1/8" | 1/2" | 2 29/32" | Round | Republic Drill | 2739A41 | 00000 | ||
Fluteless Smooth-Finish Countersinks with Pilot for Screws
High-Speed Steel
 |
0 Flutes |
These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
Dia. | Pilot | Uncoated | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Dia. | Lg. | For Screw Size | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | ||||||||||||
82° Countersink Angle | ||||||||||||
| 1/4" to 33/64" | 33/64" | 3/8" | 1/4" | 5/32" | 1/4" | 2" | Round | Republic Drill | 2739A64 | 000000 | ||
| 5/16" to 41/64" | 41/64" | 3/8" | 5/16" | 5/32" | 5/16" | 2 3/16" | Round | Republic Drill | 2739A66 | 00000 | ||
| 3/8" to 49/64" | 49/64" | 1/2" | 3/8" | 5/32" | 3/8" | 2 1/2" | Round | Republic Drill | 2739A68 | 00000 | ||
| 7/16" to 53/64" | 53/64" | 1/2" | 7/16" | 7/32" | 7/16" | 2 11/16" | Round | Republic Drill | 2739A71 | 00000 | ||
| 1/2" to 15/16" | 15/16" | 1/2" | 1/2" | 1/4" | 1/2" | 2 11/16" | Round | Republic Drill | 2739A73 | 00000 | ||
Carbide-Insert Countersinks for Screws
Carbide
 |
With Square Insert |
The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
Countersinks | Replacement Screws | Replacement Installation Keys | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Insert | Uncoated | ||||||||||||||||
For Hole Dia. | Shank Dia. | Overall Lg. | Shank Type | Installation Key Included | Shape | Code | Size | Thk. | Mfr. | Each | Each | Each | |||||
1 Flute | |||||||||||||||||
82° Countersink Angle | |||||||||||||||||
| 1/8" to 1/2" | 3/8" | 2 3/8" | Round | Yes | Triangle | TPGH-21.51 | 1/4" | 3/32" | Republic Drill | 29245A122 | 0000000 | 29245A121 | 00000 | 7273A51 | 00000 | ||
| 1/4" to 3/4" | 1/2" | 2 3/8" | Round | Yes | Triangle | TPGH-321 | 3/8" | 1/8" | Republic Drill | 29245A61 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1/2" to 1 3/4" | 1/2" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A62 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1 1/4" to 2 1/2" | 3/4" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A63 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
90° Countersink Angle | |||||||||||||||||
| 1/8" to 1/2" | 3/8" | 2 3/8" | Round | Yes | Triangle | TPGH-21.51 | 1/4" | 3/32" | Republic Drill | 29245A123 | 000000 | 29245A121 | 0000 | 7273A51 | 0000 | ||
| 1/4" to 3/4" | 1/2" | 2 3/8" | Round | Yes | Triangle | TPGH-321 | 3/8" | 1/8" | Republic Drill | 29245A64 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1/2" to 1 3/4" | 1/2" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A65 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1 1/4" to 2 1/2" | 3/4" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A66 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
 |  |  |
Individual Carbide Insert Case | Triangular Insert | Square Insert |
Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment. Inserts sold in packs come factory sealed from the manufacturer for maximum traceability.
Titanium Nitride (TiN)-Coated Carbide—Withstand heat, corrosion, and abrasion better than uncoated inserts, so they stay sharp over longer periods.
Each | Package | |||||||
|---|---|---|---|---|---|---|---|---|
Material | Insert Shape | Insert Code | Each | Pkg. Qty. | Pkg. | |||
| Uncoated Carbide | Triangle | TPGH-21.51 | 29245A222 | 000000 | 10 | 29245A221 | 000000 | |
| Uncoated Carbide | Triangle | TPGH-321 | 29245A67 | 00000 | 10 | 29245A188 | 00000 | |
| Uncoated Carbide | Square | SPGH-433 | 29245A68 | 00000 | 10 | 29245A291 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Triangle | TPGH-21.51 | 29245A224 | 00000 | 10 | 29245A223 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Triangle | TPGH-321 | 29245A71 | 00000 | 10 | 29245A306 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Square | SPGH-433 | 29245A72 | 00000 | 10 | 29245A918 | 000000 | |
Countersink Drill Bits for Screws
 |
Dia. | Lg. | 82° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Mfr. | Each | |||
Uncoated High-Speed Steel | ||||||||||||
2 Flutes | ||||||||||||
| No. 4 | 0.234" | 0.116" | 3/8" | 3 7/8" | 0.2340" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A48 | 000000 | ||
| No. 5 | 0.257" | 0.128" | 3/8" | 4 1/8" | 0.2570" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A49 | 00000 | ||
| No. 6 | 0.281" | 0.142" | 1/2" | 4 1/4" | 0.2813" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A51 | 00000 | ||
| No. 8 | 0.332" | 0.169" | 1/2" | 4 3/4" | 0.3320" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A52 | 00000 | ||
| No. 10 | 0.386" | 0.196" | 5/8" | 5 1/8" | 0.3860" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A53 | 00000 | ||
| 1/4" | 1/2" | 0.257" | 11/16" | 6" | 0.5000" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A54 | 00000 | ||
| 5/16" | 5/8" | 0.320" | 3/4" | 7 1/8" | 0.6250" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A55 | 00000 | ||
| 3/8" | 3/4" | 0.383" | 7/8" | 5" | 0.7500" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A56 | 00000 | ||
| 7/16" | 0.813" | 0.446" | 1" | 5 1/4" | 0.8125" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A58 | 000000 | ||
| 1/2" | 7/8" | 0.510" | 1" | 5 1/2" | 0.8750" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A57 | 000000 | ||
Uncoated Cobalt Steel | ||||||||||||
2 Flutes | ||||||||||||
| No. 6 | 0.281" | 0.142" | 1/2" | 4 1/4" | 0.2813" | 118° | Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel | Republic Drill | 11188N49 | 00000 | ||
| No. 8 | 0.332" | 0.169" | 1/2" | 4 3/4" | 0.3320" | 118° | Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel | Republic Drill | 11188N12 | 00000 | ||
| No. 10 | 0.386" | 0.196" | 5/8" | 5 1/8" | 0.3860" | 118° | Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel | Republic Drill | 11188N13 | 00000 | ||
| 1/4" | 1/2" | 0.257" | 11/16" | 6" | 0.5000" | 118° | Aluminum, Brass, Bronze, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel | Republic Drill | 11188N14 | 00000 | ||
Fluteless Smooth-Finish Countersink Sets with Pilot for Screws
 |
Cut a smooth, accurate seat for your screw head on the first pass. The built-in pilot centers the countersink while the hollow body prevents chip buildup, vibration, and wobbling.
High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
82° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | No. of Pieces | For Hole Dia. | Finish | Shank Type | Container Type | Mfr. | Each | |||
High-Speed Steel | ||||||||||
| 0 | 5 | 1/4" to 15/16" | Uncoated | Round | Wood Stand | Republic Drill | 2739A29 | 0000000 | ||
Fluteless Smooth-Finish Countersinks for Rivets
|
High-Speed Steel
Dia. | Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | |||||||||
100° Countersink Angle | |||||||||
| 5/32" to 13/32" | 7/16" | 1/4" | 1 21/32" | Round | Republic Drill | 2739A59 | 000000 | ||
| 3/16" to 17/32" | 9/16" | 1/4" | 1 7/8" | Round | Republic Drill | 2739A61 | 00000 | ||
| 5/16" to 25/32" | 13/16" | 1/2" | 2 5/8" | Round | Republic Drill | 2739A62 | 00000 | ||
| 9/16" to 1 1/16" | 1 1/8" | 1/2" | 2 29/32" | Round | Republic Drill | 2739A63 | 00000 | ||
Fluteless Smooth-Finish Countersink Sets for Screws
 |
With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
For Hole Dia. | 82° Countersink Angle | 90° Countersink Angle | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | No. of Pieces | 1/4" Shank | 1/2" Shank | 5/8" Shank | Finish | Shank Type | Container Type | Mfr. | Each | Mfr. | Each | ||||
High-Speed Steel | |||||||||||||||
| 0 | 5 | 1/16", 5/32", 3/16" | 5/16", 9/16" | — | Uncoated | Round | Wood Stand | Republic Drill | 2739A42 | 0000000 | Republic Drill | 2739A43 | 0000000 | ||
| 0 | 8 | 1/16", 5/32", 3/16" | 5/16", 9/16", 5/8" | 3/4", 1" | Uncoated | Round | Wood Stand | Republic Drill | 2739A21 | 000000 | — | ——— | 0 | ||
Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Rivets
 |
High-Speed Steel
Dia. | Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | |||||||||
100° Countersink Angle | |||||||||
| 1/16" to 15/64" | 1/4" | 1/4" | 1 7/8" | Round | Republic Drill | 2739A58 | 000000 | ||
Counterbores for High-Profile Rounded-Head Screws
High-Speed Steel
 |
Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
Uncoated | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body Dia. | Overall Lg. | Shank Type | No. of Flutes | Pilot Lg. | Mfr. | Each | |||
| No. 0 | 0.110" | 2 1/2" | Round | 2 | 0.110" | Republic Drill | 2909A22 | 000000 | ||
| No. 1 | 0.133" | 2 1/2" | Round | 2 | 0.170" | Republic Drill | 2909A23 | 00000 | ||
| No. 2 | 0.155" | 2 1/2" | Round | 2 | 0.120" | Republic Drill | 2909A13 | 00000 | ||
| No. 3 | 0.176" | 2 1/2" | Round | 2 | 0.120" | Republic Drill | 2909A14 | 00000 | ||
| No. 4 | 0.198" | 2 5/8" | Round | 2 | 0.170" | Republic Drill | 2909A15 | 00000 | ||
| No. 5 | 0.220" | 2 5/8" | Round | 2 | 0.220" | Republic Drill | 2909A16 | 00000 | ||
| No. 6 | 0.241" | 2 5/8" | Round | 2 | 0.230" | Republic Drill | 2909A17 | 00000 | ||
| No. 8 | 0.285" | 2 3/4" | Round | 2 | 0.120" | Republic Drill | 2909A18 | 00000 | ||
| No. 10 | 0.328" | 2 7/8" | Round | 2 | 0.190" | Republic Drill | 2909A19 | 00000 | ||
| No. 12 | 0.372" | 3" | Round | 2 | 0.250" | Republic Drill | 2909A21 | 00000 | ||
Fluteless Smooth-Finish Countersink Sets for Rivets
|
With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
For Hole Dia. | 100° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | No. of Pieces | 1/4" Shank | 1/2" Shank | Finish | Shank Type | Container Type | Mfr. | Each | |||
High-Speed Steel | |||||||||||
| 0 | 5 | 1/16", 5/32", 3/16" | 5/16", 9/16" | Uncoated | Round | Wood Stand | Republic Drill | 2739A28 | 0000000 | ||
Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws
Fluteless Smooth-Finish Countersink Sets for Lathe Centers
|
With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.
High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
For Hole Dia. | 60° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | No. of Pieces | 1/4" Shank | 1/2" Shank | Finish | Shank Type | Container Type | Mfr. | Each | |||
High-Speed Steel | |||||||||||
| 0 | 5 | 1/8", 3/16", 5/16" | 7/16", 11/16" | Uncoated | Round | Wood Stand | Republic Drill | 2739A27 | 0000000 | ||
Fluteless Smooth-Finish Countersinks for Lathe Centers
High-Speed Steel
|
0 Flutes |
Dia. | Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | |||||||||
60° Countersink Angle | |||||||||
| 3/16" to 13/32" | 7/16" | 1/4" | 1 25/32" | Round | Republic Drill | 2739A53 | 000000 | ||
| 5/16" to 17/32" | 9/16" | 1/4" | 1 15/16" | Round | Republic Drill | 2739A54 | 00000 | ||
| 7/16" to 25/32" | 13/16" | 1/4" | 2 3/8" | Round | Republic Drill | 2739A55 | 00000 | ||
| 7/16" to 25/32" | 13/16" | 1/2" | 2 3/4" | Round | Republic Drill | 2739A56 | 00000 | ||
| 11/16" to 1 3/32" | 1 1/8" | 1/2" | 2 11/64" | Round | Republic Drill | 2739A57 | 00000 | ||
Carbide-Insert Countersinks for Rivets
Carbide
|
With Square Insert |
The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
Countersinks | Replacement Screws | Replacement Installation Keys | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Insert | Uncoated | ||||||||||||||||
For Hole Dia. | Shank Dia. | Overall Lg. | Shank Type | Installation Key Included | Shape | Code | Size | Thk. | Mfr. | Each | Each | Each | |||||
1 Flute | |||||||||||||||||
100° Countersink Angle | |||||||||||||||||
| 1/4" to 3/4" | 1/2" | 2 3/8" | Round | Yes | Triangle | TPGH-321 | 3/8" | 1/8" | Republic Drill | 29245A81 | 0000000 | 29245A96 | 00000 | 7273A55 | 00000 | ||
| 1/2" to 1 3/4" | 1/2" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A82 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1 1/4" to 2 1/2" | 3/4" | 2 3/8" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A83 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| | |
Individual Carbide Insert Case | Triangular Insert | Square Insert |
Each | Package | |||||||
|---|---|---|---|---|---|---|---|---|
Material | Insert Shape | Insert Code | Each | Pkg. Qty. | Pkg. | |||
| Uncoated Carbide | Triangle | TPGH-321 | 29245A67 | 000000 | 10 | 29245A188 | 000000 | |
| Uncoated Carbide | Square | SPGH-433 | 29245A68 | 00000 | 10 | 29245A291 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Triangle | TPGH-321 | 29245A71 | 00000 | 10 | 29245A306 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Square | SPGH-433 | 29245A72 | 00000 | 10 | 29245A918 | 000000 | |
Carbide-Insert Countersinks for Lathe Centers
Carbide
|
With Square Insert |
The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.
Countersinks | Replacement Screws | Replacement Installation Keys | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Insert | Uncoated | ||||||||||||||||
For Hole Dia. | Shank Dia. | Overall Lg. | Shank Type | Installation Key Included | Shape | Code | Size | Thk. | Mfr. | Each | Each | Each | |||||
1 Flute | |||||||||||||||||
60° Countersink Angle | |||||||||||||||||
| 1/4" to 3/4" | 1/2" | 2 3/8" | Round | Yes | Triangle | TPGH-321 | 3/8" | 1/8" | Republic Drill | 29245A57 | 0000000 | 29245A96 | 00000 | 7273A55 | 00000 | ||
| 1/2" to 1 3/4" | 1/2" | 2 3/4" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A58 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| 1 1/4" to 2 1/2" | 3/4" | 2 3/4" | Round | Yes | Square | SPGH-433 | 1/2" | 3/16" | Republic Drill | 29245A59 | 000000 | 29245A96 | 0000 | 7273A55 | 0000 | ||
| | |
Individual Carbide Insert Case | Triangular Insert | Square Insert |
Each | Package | |||||||
|---|---|---|---|---|---|---|---|---|
Material | Insert Shape | Insert Code | Each | Pkg. Qty. | Pkg. | |||
| Uncoated Carbide | Triangle | TPGH-321 | 29245A67 | 000000 | 10 | 29245A188 | 000000 | |
| Uncoated Carbide | Square | SPGH-433 | 29245A68 | 00000 | 10 | 29245A291 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Triangle | TPGH-321 | 29245A71 | 00000 | 10 | 29245A306 | 000000 | |
| Titanium Nitride (TiN)-Coated Carbide | Square | SPGH-433 | 29245A72 | 00000 | 10 | 29245A918 | 000000 | |
Counterbore Drill Bits
 |
Often called step drill bits, these cut a pilot hole and counterbore in a single pass to eliminate tool changes and ensure precise alignment. Made of high-speed steel, they handle a wide range of materials, including aluminum, plastic, and stainless steel. They can be resharpened to extend tool life. The body diameter may decrease after multiple sharpenings.
Dia. | Lg. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body | Step | Step | Overall | Point Angle | For Use On | Mfr. | Each | |||
Uncoated High-Speed Steel | |||||||||||
| No. 4 | 0.219" | 0.136" | 3/8" | 3 3/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A28 | 000000 | ||
| No. 5 | 0.228" | 0.141" | 3/8" | 3 7/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A29 | 00000 | ||
| No. 6 | 0.250" | 0.15" | 1/2" | 4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A31 | 00000 | ||
| No. 8 | 0.290" | 0.178" | 1/2" | 4 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A32 | 00000 | ||
| No. 10 | 0.332" | 0.204" | 5/8" | 4 3/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A33 | 00000 | ||
| 1/4" | 0.406" | 0.281" | 11/16" | 5 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A34 | 00000 | ||
| 5/16" | 0.500" | 0.344" | 3/4" | 6" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A35 | 00000 | ||
| 3/8" | 0.594" | 0.406" | 7/8" | 7 1/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A36 | 00000 | ||
| 7/16" | 0.688" | 0.469" | 1" | 7 5/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A38 | 00000 | ||
| 1/2" | 0.781" | 0.531" | 1" | 9 7/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Republic Drill | 8914A37 | 000000 | ||
Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers
|
High-Speed Steel
Dia. | Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hole Dia. | Body | Shank | Overall Lg. | Shank Type | Mfr. | Each | |||
0 Flutes | |||||||||
60° Countersink Angle | |||||||||
| 1/8" to 15/64" | 1/4" | 1/4" | 1 7/8" | Round | Republic Drill | 2739A52 | 000000 | ||
