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THREAD: AS8879
MS21059-3 / NAS686X3 MATERIAL: Nut - C1050 carbon Steel per AMS5085 (UNS G10500) or 8740 alloy steel per AMS6322 (UNS G87400). Basket - C1050 carbon steel per AMS5085 (UNS G10500).
HEAT TREAT: Rc 49 max.
MS21059-3 / NAS686X3 FINISH: F5000-(*) - Cadmium plate per AMS-QQ-P-416, Type II, Class 2 plus Kaylube molybdenum disulfide dry film lubricant per AS5272, Type I. F5000X(*) - Cadmium plate per AMS-QQ-P-416, Type II, Class 2. F5000-(*)CW - Cadmium plate per AMS-QQ-P-416, Type II, Class 2 and carbowax.
MS21059-3 / NAS686X3 PERFORMANCE: NASM25027.
TEMPERATURE: 450°F.
VARIATIONS: Add "BC" for bottom countersunk rivet holes.
NOTES:
1. FLOATABILITY:
.030 minimum radially from centered position.
.020 maximum axial float for -3 and smaller.
.030 maximum axial float for -4 and larger.
2. For -04 and -06 sizes, c'sink or radius within ØP.
3. Dimpled rivet hole tolerance for ØK is + .015 - .00.
4. Unless otherwise specified: A) Surface texture 125 microinches.
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