HSS Straight Flute Machine Taps
HSS straight flute machine taps for metric threading, available in nine sizes from M2 to M12. Designed for machine tapping, with size-specific thread lengths and shank dimensions for tool selection.
Product Specifications
Straight Flute Machine Tap
HSS
Consistent Quality
Consistent geometry across repeat orders.
Flexible Orders
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
Standard & Custom
Standard sizes and custom configurations.
HSS Straight Flute Machine Taps – M2–M12
These HSS straight flute machine taps cut metric internal threads in nine listed sizes from M2 × 0.4 to M12 × 1.75. The straight flute configuration provides space for cutting chips and lubricant, with tool selection governed by workpiece material, chip behavior and hole depth. The supplied series is listed for through-hole machine tapping. Overall lengths range from 50 to 88 mm, with shank diameters from 3 to 9 mm. Match the selected tap to the holder, pilot hole and required thread tolerance, and confirm the application before use in blind holes or difficult materials.
Tool TypeHSS Straight Flute Tap
Thread StandardMetric M2–M12
Listed PrecisionH2
ApplicationThrough-Hole Tapping
Key Configuration
Straight flutes provide chip space and access for lubricant. Chip behavior and hole depth determine application suitability.
The listed range covers M2–M12 with pitches from 0.4 to 1.75 mm. Select the complete size-and-pitch designation.
HSS construction with shank diameters of 3–9 mm and overall lengths of 50–88 mm for holder and reach selection.
Key Product Advantages
M2–M12 Metric Range
Nine listed sizes cover common small metric threads, with a matching dimensional reference for each size.
HSS Construction
High-speed steel construction for machine threading. Confirm the exact steel grade for your application.
Straight Flute Design
Straight grooves provide room for chips and lubricant without a helical flute configuration.
Size-Specific Dimensions
Thread lengths of 8.5–30 mm and listed shank sizes support reach and holder checks.
Tapping Applications
This series is listed for through-hole threading on tapping machines, CNC machining centers and CNC lathes with suitable holders and synchronized feed. Typical workpieces include plates, brackets, housings and general machined components.
Through HolesRECOMMENDED
Metric ThreadsRECOMMENDED
CNC Machine TappingRECOMMENDED
Precision ProductionSUITABLE
Application Note: Use the listed drill sizes as reference values and confirm the actual pilot hole against the required thread tolerance and material. Synchronize feed to thread pitch and provide suitable lubrication. This series is intended for machine use; manual tapping is not recommended in the supplied data.
Workpiece Material Selection
| MATERIAL GROUP | EXAMPLES | APPLICATION LEVEL |
|---|---|---|
| P Steel | Carbon and low-alloy steels | Confirm grade and chip control |
| K Cast Iron | Short-chipping cast iron grades | Confirm tap geometry and grade |
| N Copper Alloys | Short-chipping brass and bronze grades | Application review required |
Material Note: These are material groups to evaluate, not a confirmed compatibility list for every size. Straight flute tools are often considered for short-chipping materials. Long-chipping materials, blind holes, stainless steel and hardened alloys require application-specific selection.
Product Details & Available Configurations
The product views below show the straight flute tap configuration. Use the current M2–M12 size chart for the dimensions of this series; confirm material grade and the required finished-thread tolerance when ordering.
View M2–M12 Dimensions & Sizes
Product Video
For blind-hole applications requiring a spiral flute design, see our HSS Spiral Flute Taps for Blind Holes – M3–M12. For other threading requirements, browse our HSS Tap Range.
Size Chart & Specifications
The size chart lists nine HSS straight flute machine tap specifications from M2 × 0.4 to M12 × 1.75. Thread lengths range from 8.5 to 30 mm, shank diameters from 3 to 9 mm, and overall lengths from 50 to 88 mm. Select the complete thread size and pitch, then check holder fit and the required tool reach.
Specification confirmation: HSS is the stated product material. Confirm the exact steel grade and the meaning of the listed H2 designation before ordering; no cobalt content or finished-thread tolerance is implied. Chip flow depends on the cutting geometry and workpiece, not straight flutes alone.
HSS Tap Speeds & Feed Settings
Use the chart below as a general reference for M2–M12 HSS tapping speeds. Confirm the tap type, workpiece grade and hardness, coating, thread depth and lubrication before selecting a starting spindle speed.
Setting Speed & Feed
Spindle speed: n = (1000 × Vc) / (π × D), where n is RPM, Vc is cutting speed in m/min and D is nominal tap diameter in mm.
Tapping feed: For single-start metric threads, feed per revolution equals thread pitch. When programming in mm/min, F = n × P, where P is pitch in mm.
Calculation example: An M6 × 1.0 tap at 400 RPM requires 400 mm/min synchronized feed, or 1.0 mm/rev. This illustrates the calculation only; it is not a material-specific speed recommendation.
For additional reference, see our HSS cutting tools speeds & feeds guide.
For blind-hole applications requiring a spiral flute design, see our HSS Spiral Flute Taps for Blind Holes – M3–M12.
View HY Taps Catalog — for the broader range. Use this page’s chart for the listed M2–M12 dimensions; other catalog series may differ.
HSS Tap Customization
For requirements beyond the standard range, send your tap drawing or application details. Custom HSS cutting and forming taps can be reviewed for the following specifications.
| PARAMETER | CUSTOMIZATION OPTIONS |
|---|---|
| Thread Specification | Metric, UNC/UNF and pipe threads; special diameters, pitches and left-hand threads. |
| Thread Accuracy | Tap limits and oversize allowances to suit the required internal-thread tolerance and gauging requirements. |
| Tap Geometry | Straight flute, spiral flute, spiral point or forming design; chamfer and working geometry matched to the application. |
| Length & Reach | Overall length, threaded-section length and neck clearance to suit thread depth and component access. |
| Shank & Drive Square | Shank diameter, square dimensions and holding length to match the tapping holder. |
| Material & Surface Finish | HSS or cobalt HSS grades; uncoated, TiN or TiCN options, depending on the tap design and workpiece material. |
Options depend on tap type and size. Final specifications, minimum order quantity and lead time are confirmed with the quotation.
OEM & Private Label
Customer branding and packaging can be specified for distributor and tooling-brand orders.
Laser marking: Logo, thread size, product code and batch identification, subject to available shank space. Labels & packaging: Protective tubes, product labels and branded packaging to the approved artwork.
For a quotation: Send a drawing or thread specification, required tolerance, workpiece material and hardness, blind or through-hole details, thread depth and quantity. Include machine, holder and lubrication details for application-specific requests.
HSS Tap Quality & Inspection
HSS cutting and forming taps are checked against the confirmed product specification or approved drawing. Material verification, in-process dimensional checks and final inspection focus on thread accuracy, tool geometry and consistent identification before packing.
Key Inspection Points
Inspection items and acceptance criteria depend on the tap type, size and agreed requirements.
| INSPECTION ITEM | CHECK POINTS |
|---|---|
| Material & Hardness | HSS or cobalt HSS grade and material records; hardness requirements and verification agreed for the selected grade. |
| Thread Form & Accuracy | Thread size, pitch, profile and specified tap limits against the confirmed specification or drawing. |
| Working Geometry | Flutes, spiral point and cutting edges for cutting taps; forming lobes and lubrication grooves, where present, for forming taps. Chamfer geometry checked for each design. |
| Tool Dimensions | Threaded-section length, overall length, shank diameter and drive-square dimensions. |
| Runout & Surface Condition | Specified runout, burrs, chipped edges and visible defects on cutting or forming surfaces. |
| Coating & Identification | Specified surface finish or coating, visible condition, tool marking and label accuracy. |
Inspection documentation: Specify any required material records, dimensional reports or sample-thread validation before ordering. Availability and inspection scope are confirmed with the quotation.
Packaging & Batch Identification
Individual protective packaging helps prevent damage to tap threads and working surfaces. Labels identify the tool specification and order or batch reference. Models, quantities and packing details are checked before dispatch.
Export Packing & Delivery
Outer cartons, cushioning and export packing are selected for the order quantity and shipping method. Dispatch dates, freight and payment terms are confirmed with the order.
FAQ & Technical Support
Selection, hole preparation and ordering guidance for M2–M12 HSS straight flute machine taps.
Product & Application FAQs
Which sizes are available in this series?
The size chart lists nine specifications: M2 × 0.4, M2.5 × 0.45, M3 × 0.5, M4 × 0.7, M5 × 0.8, M6 × 1.0, M8 × 1.25, M10 × 1.5 and M12 × 1.75. Thread lengths range from 8.5 to 30 mm, shank diameters from 3 to 9 mm, and overall lengths from 50 to 88 mm.
How does a straight flute tap differ from spiral flute and spiral point taps?
Straight flute taps have axial grooves that provide space for chips and lubricant. Spiral flute taps use helical grooves to help lift chips out of the hole, while spiral point taps direct chips forward. Straight flutes alone do not establish a forward chip-flow direction; selection depends on cutting geometry, chip behavior and hole depth.
Can this series be used in blind holes?
The supplied product data lists through-hole machine tapping. Blind-hole use requires confirmation of the cutting lead, usable thread depth, bottom clearance and chip control. A flat tip does not by itself make a tap suitable for bottoming. For blind holes in long-chipping materials, consider an application-matched spiral flute tap.
Which workpiece materials should I consider?
Straight flute designs are often considered for short-chipping materials, but the workpiece grade and tap geometry still need to match. Send the material grade, hardness and hole details for review. This size chart does not establish a universal rating for stainless steel, hardened steel or other difficult alloys.
How should I use the drill sizes in the chart?
Treat the listed drill sizes as reference values and confirm the actual pilot-hole diameter for the required thread tolerance and material. For example, the chart lists 5.0 mm for M6 × 1.0 and 8.5 mm for M10 × 1.5. Verify the drilled hole and inspect a trial thread before batch production.
What does the H2 marking mean for ordering?
H2 is the precision designation shown in the supplied chart. Confirm the applicable tolerance system and tap limits when ordering rather than assuming it guarantees a particular finished-thread class. Include the thread tolerance and gauging requirements from your part drawing.
What machine setup and tapping conditions are required?
Use a compatible tap holder, correct alignment, synchronized feed and suitable lubrication. Feed per revolution must match thread pitch; speed depends on material, tap size and setup. This series is intended for machine tapping, and the supplied data does not recommend manual tapping.
Ordering & Customization FAQs
What information is needed for a quotation?
Provide the full thread size and pitch, quantity per size, workpiece grade and hardness, hole type, required thread depth and finished-thread tolerance. Include holder restrictions, machine details and a drawing if standard dimensions do not fit.
Can non-standard dimensions and OEM branding be supplied?
Custom dimensions, thread specifications, surface treatments, marking and packaging can be reviewed against your requirements. Availability and inspection criteria are confirmed for the requested configuration before production.
Are sample orders and mixed sizes available?
Sample and mixed-size requests can be reviewed. MOQ, stock availability and dispatch timing depend on the selected sizes, quantities and any customization. Send a size-and-quantity list for confirmation.
Selection Guides
How to Choose HSS Cutting Tools
Thread Milling vs Tapping: Tool Selection
How to Choose a Thread Mill: Thread, Pitch & Tool Guide
The thread milling guides are for comparing alternative threading methods and selecting a thread mill when appropriate.
Catalog & Technical Downloads
General tap series reference. Use this product page’s Specifications & Sizes for the current M2–M12 dimensions; other catalog series may differ.
HSS Cutting Tools Speeds & Feeds Guide (PDF)
General HSS drilling and tapping reference. Use the tapping section and confirm settings for the workpiece and tool. Tapping feed must match the thread pitch; drilling feed values do not apply.
Need Sizes, Pricing or Custom Options?
Send us the required tool type, sizes, quantities, workpiece material and any OEM or custom requirements. We will confirm suitable specifications, availability, lead time and quotation details.
Drawings, size lists and reference photos are welcome.
