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Our DIN 338 HSS 4241 Black Oxide Twist Drill Bits are the reliable choice for hardware wholesalers, MRO suppliers, and high-volume manufacturing facilities. Engineered from premium 4241 High-Speed Steel and manufactured using a precision fully ground process, these bits offer superior concentricity and chip evacuation compared to standard roll-forged alternatives. The black oxide treatment ensures maximum lubrication and corrosion resistance, extending tool life in repetitive industrial applications.
Precision Fully Ground Flutes: The fully ground manufacturing process ensures highly accurate hole diameters and a smooth surface finish, reducing friction and heat buildup.
HSS 4241 Material: Optimized for drilling in low-carbon steel, iron, aluminum, copper, and plastics. It provides a perfect balance between toughness and cost-efficiency for general-purpose metalworking.
Black Oxide Surface Treatment: This thermal finish retains cutting lubricants to prevent galling and "welding" of chips to the bit, while providing a durable layer of protection against rust and oxidation.
Standard DIN 338 Jobber Length: Perfectly compatible with standard stationary drill presses and portable electric drills, making it a versatile addition to any tool inventory.
118° Point Angle: A versatile point geometry that provides easy penetration and reduces the required feed pressure in a wide range of materials.
As a specialized supplier to the global hardware market, we offer:
Competitive Tiered Pricing: Significant discounts for pallet-level and container-load orders.
OEM & Custom Branding: Professional laser-marking of your logo on the drill shanks and custom retail packaging (PVC pouches, metal cases, or bulk tubes).
Quality Consistency: Every batch is inspected for dimensional accuracy and hardness to ensure your customers receive a dependable product every time.
Flexible Shipping: Support for EXW, FOB, and DDP terms to streamline your import process.
Ready to upgrade your inventory? Contact our sales team today for a comprehensive wholesale price list or to request a sample pack for quality verification.
[Button: Request Bulk Quote] [Button: Download Catalog]
Application | ||||||
HSS Grade | Iron | Aluminum | Carbon Steel | Tile | Plastic | Stainless Steel |
4241 | YES | YES | NO | NO | YES | NO |
| 4341 | YES | YES | YES | NO | YES | YES |
6542(M2) | YES | YES | YES | NO | YES | GOOD |
M35 (Co 5%) | YES | YES | YES | NO | YES | VERY GOOD |
| DESCRIPTION OF HSS | C | W | Mo | Cr | V | Co | Si | Mn | P | S |
| % | % | % | % | % | % | % | % | % | % | |
| W4Mo3Cr4V(4341) | 0.88-0.98 | 3.5-4.5 | 2.5-3.5 | 3.8-4.4 | 1.2-1.8 | 0.5-1.2 | 0.2-0.4 | <=0.03 | <=0.03 | |
| W6Mo5Cr4V2(M2) | 0.8-0.9 | 5.5-6.75 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | - | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W6Mo5Cr4V2Co5(M35) | 0.9-0.95 | 5.5-6.5 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | 4.5-5.5 | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W2Mo9Cr4V2Co8(M42) | 1.05-1.15 | 1.15-1.85 | 9.0-10.0 | 3.5-4.25 | 0.95-1.25 | 7.75-8.75 | 0.15-0.65 | 0.15-0.4 | <=0.02 | <=0.025 |
| DIA. | OVERALL LENGTH (INCH) | WORKING LENGTH (INCH) | DIA. | OVERALL | WORKING LENGTH (INCH) | DIA. | OVERALL | WORKING LENGTH (INCH) | |
| 1/64" | 3/4" | 3/16" | 15# | 3-3/8" | 2-3/16" | 61# | 1-/5/8" | 11/16" | |
| 1/32" | 1-3/8" | 1/2" | 16# | 3-3/8" | 2-3/16" | 62# | 1-1/2" | 5/8" | |
| 3/64" | 1-3/4" | 3/4" | 17# | 3-3/8" | 2-3/16" | 63# | 1-1/2" | 5/8" | |
| 1/16" | 1-7/8" | 7/8" | 18# | 3-1/4" | 2-1/8" | 64# | 1-1/2" | 5/8" | |
| 5/64" | 2" | 1" | 19# | 3-1/4" | 2-1/8" | 65# | 1-1/2" | 5/8" | |
| 3/32" | 2-1/4" | 1-1/4" | 20# | 3-1/4" | 2-1/8" | 66# | 1-3/8" | 1/2" | |
| 7/64" | 2-5/8" | 1-1/2" | 21# | 3-1/4" | 2-1/8" | 67# | 1-3/8" | 1/2" | |
| 1/8" | 2-3/4" | 1-5/8" | 22# | 3-1/8" | 2" | 68# | 1-3/8" | 1/2" | |
| 9/64" | 2-7/8" | 1-3/4" | 23# | 3-1/8" | 2” | 69# | 1-3/8" | 1/2" | |
| 5/32" | 3-1/8" | 2" | 24# | 3-1/8" | 2" | 70# | 1-1/4" | 3/8" | |
| 11/64" | 3-1/4" | 2-1/8" | 25# | 3" | 1-7/8” | 71# | 1-1/4" | 3/8" | |
| 3/16" | 3-1/2" | 2-5/16" | 26# | 3" | 1-7/8" | 72# | 1-1/8" | 5/16" | |
| 13/64" | 3-5/8" | 2-7/16" | 27# | 3” | 1-7/8" | 73# | 1-1/8" | 5/16" | |
| 7/32" | 3-3/4" | 2-1/2" | 28# | 2-7/8" | 1-3/4" | 74# | 1" | 1/4" | |
| 15/64" | 3-7/8" | 2-5/8" | 29# | 2-7/8" | 1-3/4" | 75# | 1" | 1/4" | |
| 1/4" | 4" | 2-3/4" | 30# | 2-3/4" | 1-5/8" | 76# | 7/8" | 3/16" | |
| 17/64" | 4-1/8" | 2-7/8" | 31# | 2-3/4" | 1-5/8" | 77# | 7/8" | 3/16" | |
| 9/32" | 4-1/4" | 2-15/16" | 32# | 2-3/4" | 1-5/8" | 78# | 7/8" | 3/16" | |
| 19/64" | 4-3/8" | 3-1/16" | 33# | 2-5/8" | 1-1/2" | 79# | 3/4" | 1/8" | |
| 5/16" | 4-1/2" | 3-3/16" | 34# | 2-5/8" | 1-1/2" | 80# | 3/4" | 1/8" | |
| 21/64" | 4-5/8" | 3-5/16" | 35# | 2-5/8" | 1-1/2" | A | 3-/7/8" | 2-5/8" | |
| 11/32" | 4-3/4" | 3-7/16" | 36# | 2-1/2" | 1-7/16" | B | 4" | 2-3/4" | |
| 23/64" | 4-7/8" | 3-1/2" | 37# | 2-1/2" | 1-7/16" | C | 4" | 2-3/4" | |
| 3/8" | 5" | 3-5/8" | 38# | 2-1/2" | 1-7/16" | D | 4" | 2-3/4" | |
| 25/64" | 5-1/8" | 3-3/4" | 39# | 2-3/8" | 1-3/8” | E | 4" | 2-3/4" | |
| 13/32" | 5-1/4" | 3-7/8" | 40# | 2-3/8" | 1-3/8" | F | 4-/1/8" | 2-7/8" | |
| 27/64" | 5-3/8" | 3-15/16" | 41# | 2-3/8" | 1-3/8" | G | 4-/1/8" | 2-7/8" | |
| 7/16" | 5-1/2" | 4-1/16" | 42# | 2-1/4" | 1-1/4" | H | 4-/1/8" | 2-7/8" | |
| 29/64" | 5-5/8" | 4-3/16" | 43# | 2-1/4" | 1-1/4" | I | 4-1/8” | 2-7/8" | |
| 15/32" | 5-3/4" | 4-5/16" | 44# | 2-1/8" | 1-1/8" | J | 4-/1/8" | 2-7/8" | |
| 31/64" | 5-7/8" | 4-3/8" | 45# | 2-1/8" | 1-1/8" | K | 4-/1/4" | 2-15/16" | |
| 1/2" | 6" | 4-1/2" | 46# | 2-1/8" | 1-1/8" | L | 4-/1/4" | 2-15/16" | |
| 1# | 3-7/8" | 2-5/8" | 47# | 2" | 1" | M | 4-3/8" | 3-1/16" | |
| 2# | 3-7/8" | 2-5/8" | 48# | 2" | 1" | N | 4-3/8" | 3-1/16" | |
| 3# | 3-3/4" | 2-1/2" | 49# | 2" | 1" | O | 4-1/2" | 3-3/16" | |
| 4# | 3-3/4" | 2-1/2" | 50# | 2" | 1" | P | 4-5/8" | 3-5/16" | |
| 5# | 3-3/4" | 2-1/2" | 51# | 2" | 1" | Q | 4-3/4" | 3-7/16" | |
| 6# | 3-3/4" | 2-1/2" | 52# | 1-7/8" | 7/8" | R | 4-3/4" | 3-7/16" | |
| 7# | 3-5/8" | 2-7/16" | 53# | 1-7/8" | 7/8" | S | 4-7/8" | 3-1/2" | |
| 8# | 3-5/8" | 2-7/16" | 54# | 1-7/8" | 7/8" | T | 4-7/8" | 3-1/2" | |
| 9# | 3-5/8" | 2-7/16" | 55# | 1-7/8" | 7/8" | U | 5" | 3-5/8" | |
| 10# | 3-5/8" | 2-7/16" | 56# | 1-3/4" | 3/4" | V | 5" | 3-5/8" | |
| 11# | 3-1/2" | 2-5/16" | 57# | 1-3/4" | 3/4" | W | 5-1/8" | 3-3/4" | |
| 12# | 3-1/2" | 2-5/16" | 58# | 1-5/8" | 11/16" | X | 5-1/8" | 3-3/4" | |
| 13# | 3-1/2" | 2-5/16" | 59# | 1-5/8" | 11/16" | Y | 5-1/4" | 3-7/8" | |
| 14# | 3-3/8" | 2-3/16" | 60# | 1-5/8" | 11/16" | Z | 5-1/4" | 3-7/8" | |
