Hydraulic catalogue - Normapress

Technical recommendationsThreaded fittings, tapped holesThreaded fittings form CMetric threads: DIN 3852-1BSP threads: DIN 3852-2Threaded fittings NPTNPT: ANSI/ASME B1.20.1-1983NPTF: ANSI/ASME B1.20.3-1976Threaded fittings BSPT*BSPT threads: ISO 7Tapped hole form ZMetric threads: DIN 3852-1BSP threads: DIN 3852-2Tapped hole NPTNPT: ANSI/ASME B1.20.1-1983NPTF: ANSI/ASME B1.20.3-1976Tapped hole BSPTEtanchéité par filetage coniqueBSP threads: ISO 7211Metricd1 b2 t3C min. min.M8x1 M8x1 5,5 10,0M10x1 M10x1 5,5 10,0M12x1,5 M12x1,5 8,5 13,5M14x1,5 M14x1,5 8,5 13,5M16x1,5 M16x1,5 8,5 13,5M18x1,5 M18x1,5 8,5 13,5M20x1,5 M20x1,5 10,5 15,5M22x1,5 M22x1,5 10,5 15,5BSPd1 b2 t3C min. min.R1/8 Rp1/8 5,5 8,5R1/4 Rp1/4 8,5 12,5R3/8 Rp3/8 8,5 12,5R1/2 Rp1/2 10,5 16,5NPTb2 b3C min. min.1/8 NPT 6,9 11,61/4 NPT 10,0 16,43/8 NPT 10,3 17,41/2 NPT 13,6 22,63/4 NPT 14,1 23,11 NPT 16,8 27,81 1/4 NPT 17,3 28,31 1/2 NPT 17,3 28,3BSPTd bC min. min.R1/8 Rc 1/8 6,5R1/4 Rc 1/4 9,7R3/8 Rc 3/8 10,1R1/2 Rc 1/2 13,2R3/4 Rc 3/4 14,5R1 Rc 1 16,8R1 1/4 Rc 1 1/2 19,1R1 1/2 Rc 1 1/2 19,1* for couplings to ISO 8434-2For taper threads, correct tightness requires the use of a thread sealing aid.