B-KIDS závitník G 1 DIN-5156C R40 HSSE 800 rúrkový závitník

With a 40 mm thread length and 4 straight flutes, this cobalt-enriched HSSE pipe thread tap cuts clean, accurate G 1 (BSPP) threads in steel, stainless steel, cast iron, and non-ferrous metals. The C-type chamfer (2–3 threads lead) suits both through-hole and blind-hole tapping, while the uncoated surface allows easy re-sharpening for extended service life.

Overview

The B-KIDS TAP G 1 DIN-5156C R40 HSSE 800 is a professional-grade machine tap engineered for cutting BSPP (British Standard Pipe Parallel) threads to DIN 5156 / ISO 228-1 standards. Its 1-inch nominal size, 11 TPI pitch, and C-type chamfer make it ideal for pipe fittings, hydraulic components, and general engineering applications. The tap features a straight flute design for efficient chip evacuation and a right-hand cutting direction for standard machine tapping operations.

What stands out

• Cobalt-enriched HSSE steel for superior heat resistance and wear life, even in tough materials.
• 4-flute geometry balances chip removal and cutting stability for consistent thread quality.
• Uncoated surface allows easy re-sharpening, extending tool service life.
• Precision-ground threads ensure accurate pitch diameter and smooth thread finish.
• Robust 25 mm shank diameter and 20 mm square drive for secure tool holding.

Technical details

• Thread standard: ISO 228-1 / DIN 5156
• Thread type: G (BSPP – British Standard Pipe Parallel)
• Nominal thread size: 1 inch
• Thread pitch: 11 TPI
• Material: HSSE (High-Speed Steel with Cobalt)
• Chamfer form: C (2–3 threads lead)
• Application type: Machine tapping
• Cutting direction: Right-hand
• Flute type: Straight flute
• Overall length (L1): 150 mm
• Thread length (L2): 40 mm
• Shank diameter (d2): 25 mm
• Square drive size (a): 20 mm
• Number of flutes: 4
• Surface treatment: Uncoated
• Recommended material group: P, M, K, N (Steel, Stainless Steel, Cast Iron, Non-ferrous metals)
• Manufacturer series: R40
• Product series code: 800
• Product type: Pipe Thread Tap

Our verdict

Precision-ground from cobalt-alloyed HSSE steel, this tap delivers reliable performance in demanding materials. Its robust construction and re-sharpenable design make it a cost-effective choice for professional workshops.