KEY TO ABBREVIATIONS USED IN ILLUSTRATED PARTS MANUAL
| Abbreviation | What it Represents | 
| 
 | 
 | 
| º (Dimension) | Degrees (Angle) | 
| " (Dimension) | inches | 
| cfm | cubic feet per minute | 
| cl | centiliters | 
| cm | centimeters | 
| Dba | Decibels | 
| DC | Direct Current | 
| ESNA (Fastener) | Nylon Insert Locknut | 
fl. oz. ....................................................................................................................................... fluid ounces
| FSC | Forward Speed Control | 
| ft | feet | 
| GHS | Grass Handling System | 
| GR (Fastener) | Grade | 
| HP | Horse Power | 
| ID | Identification or Inside Diameter | 
| kg | kilograms | 
| km/h or kph | kilometers per hour | 
| kPa | kilopascals | 
| lb | pounds | 
| lbf | poundals or pounds force | 
| LH | Left Hand (orientated with operator on seat) | 
| m | meters | 
| mm (Dimension) | millimeters | 
| mph | miles per hour | 
| N | Newtons | 
| NC (Fastner) | National Coarse | 
| NF (Fastner) | National Fine | 
| NPT | National Pipe Thread | 
| NS (as part number) | Item is not sold by Walker Manufacturing | 
| N·m | |
| O/L | Obtain Locally (Item is not sold by Walker Manufacturing) | 
| P/N | Part Number | 
| PPHMS (Fastener) | Phillips Pan Head Machine Screw | 
| PSI | Pounds Square Inch | 
| PTO | Power  | 
| RH | Right Hand (orientated with operator on seat) | 
| RPM | revolutions per minute | 
| SAE (Fastener) | Society of Automotive Engineers | 
| SBH (Fastener) | Socket Button Head (Bolt) | 
| S/N | Serial Number | 
| U | Unified | 
NOTE: In some instances, combinations of abbreviations may be used (e.g. UNC - Unified National Coarse).
| Use only genuine Walker® replacement parts. | Effective Date  | 
90
