- Dimensions are in inches.
 - Formerly designated Medium Helical Spring Lock Washers.
 
- Carbon Steel
 - Stainless Steel
 - Phosphorus Bronze
 
                    Unit of Measure
                    
               
        
            Specifications
                                                                                Product | 
                                                                        N/A Washers | 
                                                                                Unit of Measure | 
                                                                        N/A English | 
                                                                                Nominal Washer Size | 
                                                                        N/A 1-3/8 in | 
                                                                                Nominal Washer Size (Decimal) | 
                                                                        N/A 1.3750 in | 
                                                                                Max. Inside Diameter (A) | 
                                                                        N/A 1.408 in | 
                                                                                Min. Inside Diameter (A) | 
                                                                        N/A 1.379 in | 
                                                                                Max. Outside Diameter (B) | 
                                                                        N/A 2.219 in | 
                                                                                Min. Mean Section Thickness (ti + to)/2 | 
                                                                        N/A 0.344 in | 
                                                                                Min. Section Width (W) | 
                                                                        N/A 0.391 in | 
                                                                                Min. Bearing Width (BW) | 
                                                                        N/A 0.274 in | 
                                                                                Material | 
                                                                        N/A Carbon Steel Phosphorus Bronze Stainless Steel | 
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