ACTUALLY I WANT TO MEASURE THE TOTAL LENGTH OF THE THREADS ON THE BSPP FIXED FEMALE, BSPT FIXED FEMALE, BSPP SWIVEL FEMALE BSPT SWIVEL FEMALE, BSPP MALE & BSPT MALE ADAPTORS.
I HAVE REFERED THE MACHINERY'S HANDBOOK 27 TH ADITION BUT I WAS NOT ABLE TO UNDERSTAND THE WORD 'BASIC GAGE LENGTH' IF YOU CAN GIVE ME THE PROPER DETAILED DRAWING OF THE ABOVE MENTIONED ARTS WITH THREAD LENGTHS ACCORDING TO BRITISH STANDARDS THEN ITS BETTER FOR ME. I'M NOT ABLE TO SPEND MONEY ON THE ORIGINAL STANDARDS REFERENCE BOOKS WHICH ARE AVAILABLE FROM STANDARDS.