MS90708D
REQUIREMENTS:
1. CLASSIFICATION: RETAINING RINGS FURNISHED UNDER THIS STANDARD SHALL BE TYPE I, CLASS 8 OF THE PROCUREMENT SPECIFICATION.
2. MATERIAL:
(a) CARBON SPRING STEEL, GRADE 1060 THRU 1095 (UNS G10600 THRU G10950) IN ACCORDANCE WITH ASTM A 568/A568M OR ASTM A684/A684M.
(b) CORRISION RESISTANT STEEL, IN ACCORDANCE WITH SAE AMS 5520 (UNS S15700).
(c) BERYLLIUM COPPER, ALLOY NUMBER 170 (UNS C17000) OR ALLOY NUMBER 172 (UNS C17200) IN ACCORDANCE WITH ASTM B194.
3. HARDNESS
TABLE II. HARDNESS.
0SHAFT (REF) |
CARBON STEEL |
CORROSION RESISTANT STEEL |
BERYLLIUM COPPER |
.469 TO .625 INCL .669 TO 1.500 INCL 1.562 TO 3.375 INCL .669 TO 1.875 INCL |
66.5-71.5 HR30N 52.5-59.0 HR45N 48.0-53.0 HRC -- |
44-51 HRC 44-51 HRC 44-51 HRC -- |
56.5-62 HR30N -- -- 37-43 HRC |
4. PROTECTIVE FINISH OR TREATMENT:
(a). CARBON STEEL - SHALL BE AS SPECIFIED (SEE TABLE Ill OR IV)
(1) CADMIUM PLATE IN ACCORDANCE WITH SAE AMS-QQ-P-416, TYPE II, CLASS 3 OR ASTM B 696, TYPE II, CLASS 5 OR ZINC-NICKEL PLATE IN ACCORDANCE WITH SAE AMS 2417, TYPE 2.
(2) ZINC COAT IN ACCORDANCE WITH ASTM B633, TYPE II, CLASS Fe/Zn 5 OR ASTM B 695, TYPE II, CLASS 5. (3) PHOSPHATE COAT IN ACCORDANCE WITH MIL-DTL-16232, TYPE Z, CLASS 2.
(b) CORROSION RESISTANT STEEL - SHALL BE CLEANED, DESCALED AND PASSIVATED IN ACCORDANCE WITH SAE AMS2700.
5. PART NUMBER: THE BASIC MS PART NUMBER IS FOLLOWED BY A DASH NUMBER TAKEN FROM TABLE Ill OR IV.
EXAMPLE: MS90708-1200 IS THE PART NUMBER FOR A CARBON STEEL, CADMIUM PLATE, EXTERNAL INTERLOCKING, RETAINING RING FOR USE ON A 2.000 DIAMETER SHAFT.
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