SERIES 401, 402 — for BSW, BSF Screw Thread

• Conformed standard: BS 84, FED-STD-H28                      • Class: 2, 3 (medium, close) • Left hand available upon request.          • Double end (GO+NG) plug gage with handle (Red-marked NG side).             • Special sizes available upon request. • Large sizes available upon request. • Packing in individual plastic box or carton.   • Thread setting gages are available and details for inquiry. • Order No. Example: Plug set: 401-1/8"-40BSW, 2 (401-nominal size and TPI, class)                                 Ring gage: 402-1/8"-40BSW, 2, NO GO(402-nominal size and TPI, class, type: GO or NO GO)

BSW: British Standard Whitworth threads
BSF: British Standard Fine threads