4820-124, METRIC 60° 4820-452, METRIC 60° AND WHITWORTH 55° 4820-230, UNIFIED 60° 4820-552, METRIC 60° AND UNIFIED 60° 4824-12, ACME 30° 4791-200, DIN875 grade 0 6210-81 6201-60 6202-80 2314-10FA, flat back 4206-1, 6pcs 3227-504, with setting rings 3227-1004, with setting rings 4602-17, length 100mm 2173-360 IST-DCT10