This precision machine tap is designed for G (BSPP) parallel pipe threads according to DIN ISO 228. The Form C short lead allows maximum thread depth in blind holes, while the TIN-coating ensures long tool life, superior surface quality, and reduced friction. Suitable for non-alloyed and low-alloyed steels up to 900 N/mm² and ideal for professional and industrial use.
Matching holders, lubricants and thread gauges available separately.
| Thread Type | G (BSPP) parallel pipe thread, DIN ISO 228 (non-sealing) |
| Standard | DIN 5156 |
| Form | Form C (short lead, for blind holes) |
| Material | HSSE, TIN-coated |
| Nominal Size | G 1/8 × 28 |
| Overall Length (L1) | 90 mm |
| Thread Length (L2) | 20 mm |
| Shank Diameter (D2) | 7 mm |
| Drive Square | 5.5 mm |
| EAN | 4022835784135 |
| Article Number | 78413 |
Is G (BSP) the same as BSPT?
No. G (BSPP) is parallel, while BSPT (R/Rc) is tapered and seals via flank contact.
When should I choose Form C?
Form C is ideal for blind holes where you need maximum depth; for through holes, use Form B.
What cutting parameters are recommended?
Use moderate speeds and feeds with generous lubrication; TIN allows slightly higher values with stable setups.
How can I verify thread quality?
Use appropriate GO/NO-GO gauges or thread plugs for G (BSP) sizes.
Do I need sealing compounds?
Yes, since G (BSPP) is not self-sealing, use O-rings, gaskets, or thread sealants for leak-tight joints.
Need more info about thread standards or accessories? Contact us via the contact form.
| Type of thread | Pipe thread |
|---|---|
| Standard | DIN 5156 |
| Form | Form C |
| Material | HSSE |
| Tolerance | medium |
| Size | G (BSP) 1/8 x 28 |
| Overall length (L1) | 90 mm |
| Thread length (L2) | 20 mm |
| Core hole diameter (D1) | 8.8 mm |
| Shank diameter (D2) | 7.0 mm |
| Drive connector | 5.5 mm |
| EAN | 4022835784135 |
| Item number | 78413 |
| Type of flute | straight fluted |
| Application | for blind holes |
| Thread standard | DIN ISO 228 |
| Coating | TIN |
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