| DESIGN TYPE | MAINSPRING W/AUXILIARY LEAF |
| INDIVIDUAL LEAF TYPE DESIGNATION | LEAF NO.1 MAIN SPRING |
| INDIVIDUAL LEAF TYPE DESIGNATION | LEAF NO.2 AUXILIARY SPRING |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI/SAE 6150H (UNS H61500) ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL HARDNESS RATING | 388.0 BRINELL MINIMUM AND 461.0 BRINELL MAXIMUM |
| MATERIAL | STEEL COMP 6150H OVERALL |
| SPRING LENGTH UNDER LOAD | 1770.0 MILLIMETERS NOMINAL |
| SPECIAL FEATURES | SPRING SEAT LENGTH 175MM MIN. USE ASTM E380 WHERE 1 INCH= 25.4MM. ALIGNMENT CLIP DESIGN AT MANUFACTURER'S OPTION. DRAWING 12422507 DESCRIBES PART AS "PARABOLIC LEAF SPRING ASSEMBLY". |
| SURFACE TREATMENT | PRIMER AND PAINT OVERALL |