FREE delivery on orders over €150
Product Specifications:
| Item | Threaded Shank Drill Bit |
| Aircraft Drill | Yes |
| Application | For Aviation |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.159 |
| Depth X Dia. Ratio | 2xd |
| Drill Bit Dimension Type | Wire |
| Drill Bit Finish | Black Oxide |
| Drill Bit Grouping | Drill Bit |
| Drill Bit Material | Cobalt Steel |
| Drill Bit Point Angle | 135° |
| Drill Bit Point Type | Split Point |
| Drill Bit Size | #21 |
| Finish | Black Oxide |
| Finish - Machining | Black Oxide |
| Flute Length | 5/16" |
| Flute Type | Spiral |
| Material | Cobalt |
| Material - Machining | Cobalt |
| Max. Drilling Depth | 5/16" |
| Number Of Flutes | 2 |
| Overall Length | 9/16" |
| Point Angle | 135° |
| Point Type | Split Point |
| Primary Material Application | Steel |
| Primary Material Application Iso Code | P, S |
| Shank Thread Size | 1/4"-28 |
| Shank Type | Threaded |
| Shank Type - Machining | Threaded |
| Spiral Direction | Right Hand |
| System Of Measurement | Wire |
| Web Construction | Split |
Shipping Info:
| Ship height (cm) | 2.54 |
| Ship length (cm) | 2.54 |
| Ship width (cm) | 2.54 |
Product Variants
| Product | Model | Decimal Equivalent | Overall Length | Material | Flute Length | Primary Material Application | Drill Bit Size | Max. Drilling Depth | Finish | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
953HS11SS | 0.191 | 1 1/4" | High Speed Steel | 9/16" | Cast Iron, Steel | #11 | 9/16" | Black Oxide | €5.29 | |
![]() |
953HS1/4ST | 0.25 | 9/16" | Steel | 5/16" | Cast Iron, Steel | 1/4" | 0.312" | High Speed Steel | €5.88 | |
![]() |
953CO1LS | 0.228 | 2 1/8" | Cobalt | 1 1/8" | Steel | #1 | 1 1/8" | Black Oxide | €8.06 | |
![]() |
953HS1LS | 0.228 | 2 1/8" | High Speed Steel | 1 1/8" | Cast Iron, Steel | #1 | 1 1/8" | Black Oxide | €6.79 | |
![]() |
953HS1ST | 0.228 | 5/8" | High Speed Steel | 5/16" | Cast Iron, Steel | #1 | 5/16" | Black Oxide | €6.63 | |
![]() |
953CO1ST | 0.228 | 5/8" | Cobalt | 5/16" | Steel | #1 | 5/16" | Black Oxide | €7.16 | |
![]() |
953HS1SS | 0.228 | 1 1/4" | High Speed Steel | 9/16" | Cast Iron, Steel | #1 | 9/16" | Black Oxide | €6.40 |
Explore Products
- IPG F4185G Carton Tape Clear 2 Inch x 60 Yard
- TSUBAKI C2060HD34LRB Roller Chain
- EATON HMX3D4B4NAP3L3 Adjustable Frequency Drive, 3.4A, Pilot, 2HP, IntelliDisconnect NEMA Type 12, FS4, 480V
- SPEARS VALVES 93231A101-015 Special Reinforced Diaphragm Valve, FKM, 1-1/2 Size, PVC
- VERMONT GAGE 912212160 Pin Gage, Class ZZ, NoGo, BG, 12.16 mm Size
- GEARWRENCH 81392 3/8 Inch Drive 120XP Head Ratchet and 6 Point Metric Socket Mechanics Tool Set, 18 Pcs
- ALEMITE 2371 Asst Bo X Fitting Metric Threaded
Explore More
- HARRIS
- KEYSHAFT
- SAFETY TECHNOLOGY INTERNATIONAL
- SOUTHWORTH
- GRAND ROCK
- Air Polishers and Buffers
- Basket Truck Accessories
- Impact Wrench Accessories
- Dial Calipers
- Bump Caps
- SALISBURY Class 0 Electrical Gloves Kit, 11 Inch, Red
- MOON AMERICAN Male Dry Hydrants, With 45 Deg. Elbow
- LUMAPRO Miniature Incandescent Bulbs, B3 Lamp Shape
- JOHN GUEST Union Elbows, Acetal Gray
- ANVIL ASTG Series Top Grid Nuts, Electro-Galvanized
- WESTWARD Stick Electrode Hardfacing
- ENERPAC GT Series Hydraulic Topside Bolt Tensioners
- BOSTON GEAR 8 Diametral Pitch Steel Stem Pinions
- JUSTRITE ChemCor Series Lined Hazmat Cabinets
Contact us
Contact your account manager right away to get personal advice.
We're available Monday through Friday, from 07:30 until 17:00.
ROCKY MOUNTAIN TWIST 953CO21ST Threaded Shank Drill Bit, #21 Drill Bit Size, 5/16 Inch Flute Length
€6.04 /unit




