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Machine Tap M39x1 DIN 374 C HSSE Fra
0000010987
Thread size: M39x175 sizes of this tap
M3x0,35M3,5x0,35M4x0,5M5x0,5M6x0,75M8x0,75M8x1M10x0,5M10x0,75M10x1M10x1,25M11x1M12x1M12x1,25M12x1,5M14x1M14x1,25M14x1,5M15x1M15x1,5M16x0,75M16x1M16x1,5M16x1,75M17x0,75M17x1M18x1M18x1,25M18x1,5M18x2M19x1M20x1M20x1,25M20x1,5M20x2M22x1M22x1,5M22x2M23x1,25M24x1M24x1,5M24x2M25x1M25x1,5M25x2M27x1M27x1,5M27x2M28x1M28x1,5M28x2M30x1M30x1,5M30x2M32x1,5M32x2M33x1,5M33x2M34x1,5M35x1,5M36x1,5M36x2M36x3M38x1,5M39x1M39x1,5M40x1,5M42x2M48x1,5M48x2M48x3M50x1,5M52x1,5M52x3M56x3
€103.58 tax inc.
Net price: €84.21
Description
Material HSSE
Thread size M39x1
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M39x1 HSSE INOX general-purpose machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M39x1 |
| Thread Pitch P | 1 mm |
| Overall Length l1 | 170 mm |
| Flute Length l2 | 30 mm |
| Shank Diameter d2 | 32 mm |
| Square Drive Size a | 24 mm |
| Tap Drill Diameter | 38 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 M39x1 tap has a reduced shank to DIN 374: diameter 32 mm, square size 24 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 1 mm/rev, equal to the pitch of the M39x1 thread.
M39x1 INOX machine tap – HSSE for stainless steel
The HSSE series, designed for manufacturing engineers and CNC operators working with metric fine threads, includes the Fra M39x1 INOX machine tap with a pitch of 1 mm. The 6H tolerance in accordance with DIN 374 guarantees the dimensional repeatability required when manufacturing hydraulic and pneumatic components with stringent leak-tightness requirements. The thread pitch of 1 mm provides the maximum number of threads per unit length. HSSE steel with 5% cobalt ensures a hardness of 66 HRC and long cutting edge life in stainless and difficult-to-machine steels.
Key features of the M39x1 general-purpose tap
- Fine pitch of 1 mm provides the maximum number of threads per unit length, increasing the sealing performance and load capacity of the joint in hydraulic components
- Designed for stainless steels of austenitic grades 304 and 316, structural steels up to 800 MPa, and aluminum alloys and engineering brass
- Precision of the 6H tolerance required in the production of hydraulic housings, valve blocks, and components for high-pressure industrial valves and fittings
- Durability thanks to HSSE steel with 5% cobalt allows 350-500 threads to be produced in structural steel with proper lubrication using tapping oil
- Compatibility with ER40 holders and tapping heads for CNC machining centers with synchronous tapping and axial compensation
- M39x1 HSSE machine tap with form C directs chips correctly in both through holes and blind holes without the risk of jamming
The Fra M39x1 machine tap for through holes and blind holes is used to manufacture industrial valves and fittings and hydraulic power components. European manufacturing quality guarantees reliability. The tap drill diameter for the M39x1 thread is 38 mm.
Cutting data for the M39x1 HSSE INOX general-purpose machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 41-163 | 41-163 |
| MStainless steel / INOX | 5-10 | 41-82 | 41-82 |
| KCast iron | 5-15 | 41-122 | 41-122 |
| NAluminum | 10-25 | 82-204 | 82-204 |
Thread preparation M39x1
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 38 mm
3 Tapping
M39x1
✓ Done!
Tolerance 6H
Standard: DIN 374 | 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 M39x1 HSSE tap with form C and straight flutes is versatile – it is suitable for both through and blind holes. The design ensures proper chip evacuation in both types of holes.
The M39x1 HSSE tap cuts internal threads to tolerance class 6H. The 6H designation defines the permissible deviations of the thread pitch and minor diameters – the digit 6 indicates the width of the tolerance zone (medium), while the letter H indicates the position of the zone at the zero line. The 6H tolerance ensures a proper fit with screws of tolerance class 6g.
When tapping stainless steels, an EP emulsion at a minimum concentration of 8% or tapping oil is recommended for cooling. Cooling extends tool life by a factor of 2-3 and improves the thread surface finish.
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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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