Boxed and Bulk Grease Fittings: US Thread Fittings: 1/8 in. NPT threadHome → Products → Lubrication → Lubrication / Manual And Automatic → Manual Grease Guns → Grease Fittings And Accessories → Grease Coupler Extensions and Adapters → Boxed and Bulk Grease Fittings: US Thread Fittings: 1/8 in. NPT thread To Order Call:216.749.5100216.749.5100 Model Model Description Size Bulk (each) 100 piece box in. mm 5000 5000c Straight 22/32 16.7 5003 5003c Straight 1-1/4 31.8 5200 5200c 45° angle 7/8 22.2 5300 5300c 65° angle 29/32 23.1 5400 5400c 90° angle 27/32 21.4