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Description
Material HSSE
Thread size M16
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M16 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M16 |
| Thread Pitch P | 2 mm |
| Overall Length l1 | 110 mm |
| Flute Length l2 | 32 mm |
| Shank Diameter d2 | 12 mm |
| Square Drive Size a | 9 mm |
| Tap Drill Diameter | 14 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. There is no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute, next to the cutting edges that produced them. They leave the hole only when the tap is backed out. The M16 x2 tap has a reduced shank to DIN 376: diameter 12 mm, square size 9 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates clockwise to cut a right-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
Feed 2 mm/rev, equal to the pitch of the M16 x2 thread.
M16 INOX machine tap – for CNC machining
In this range, Narex offers an M16 INOX machine tap with optimized cutting geometry for metric threads with a diameter of 16 mm. The tool meets DIN 376 requirements and provides the 6H thread tolerance class required in series production of mechanical and precision components. Its HSSE steel construction with 5% cobalt guarantees a hardness of 66 HRC and resistance to cutting zone temperatures up to 650°C. Form C with straight flutes provides versatility for through and blind holes in stainless and structural steels.
Advantages of the Narex M16 INOX tap
- Compatibility with ER32 holders collets and synchronized tapping chucks for CNC machining centers with automatic tool change
- Durability increased by the addition of cobalt in HSSE steel extends cutting edge life by 40-60% compared with standard HSS taps
- Material versatility covering austenitic stainless steels 304 and 316, structural steels up to 800 MPa and nonferrous metals such as aluminum and brass
- Precision to tolerance class 6H meeting the requirements of series production of mechanical and pneumatic components with tight fit tolerances
- Conforms to DIN 376 ensures standardized long shank dimensions and interchangeability with tools from European cutting tool manufacturers
- Universal M16 machine tap with form C ensures proper chip evacuation in through holes and blind holes without the risk of jamming
The Narex M16 HSSE machine tap is used in steel structures, industrial welding, and the production of industrial automation components. The M16 machine tap for through and blind holes is compatible with automatic tool change systems. The tap drill diameter for an M16 thread is 14 mm for a coarse thread with a pitch of 2 mm.
Cutting data for the universal M16 HSSE INOX machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 99-398 | 198-796 |
| MStainless steel / INOX | 5-10 | 99-199 | 198-398 |
| KCast iron | 5-15 | 99-298 | 198-596 |
| NAluminum | 10-25 | 199-497 | 398-994 |
Thread preparation M16
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 14 mm
3 Tapping
M16
✓ Done!
Tolerance 6H
Standard: DIN 376 | Chamfer: C (straight) | Application: general-purpose (through and blind holes)
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M16 HSSE tap is suitable for austenitic stainless steels 304 and 316, structural steels up to 800 MPa, ductile cast iron, and aluminum and brass alloys. It is not recommended for hardened steels above 45 HRC.
The nominal tap drill diameter for the M16 thread is 14 mm. The hole tolerance zone should be within the range of 13.9–14.1 mm. A hole at the lower tolerance limit produces a fuller thread profile, while a hole at the upper limit reduces tapping torque.
The M16 tap works with ER25 holders and tapping chucks with axial compensation. Synchronized heads with automatic tool change capability are recommended for CNC machines.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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