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1020 Steel Milspec Flat Washers - Request for Information


1020 Steel: is a plain carbon steel grade providing increased strength and ductility.  1020 steel retains integrity in basic structural applications while still being a low cost material.


Milspec: Military standards are most often defined by an efficient operation and substantial longevity in inhospitable or rugged conditions and environments.  


Flat Washers:  primarily used with other hardware, such as nuts and bolts to distribute forces in the process of tightening.  Tightness is determined by pattern features such as nominal screw sizes, screw pitch thread, interior and exterior diameter ratios and height. 


Washers: circular hardware used for spacing, load distribution, sealing and vibration reduction.  Washers are produced through stamping and shaping a variety of materials including various metal, plastic, rubber and fiber.  

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TitlePart NumberQTY-OHDRAWINGOUTER DIAMINNER DIAMTHICK
AN960-PD6L AN960-PD6L 28700REV 21 0.3750.1490.016
N400P90 N400P90 06.9803.1050.344
NAS1149D0463H NAS1149D0463H 45750REV 4 0.5000.2650.063
NAS620-5L NAS620-5L 190500REV 7 0.2380.1280.016
N401P18 N401P18 1601.3550.7920.090
MS9549-04 MS9549-04 9900AS9549 0.2500.1190.014
N401P9C N401P9C 41000.4010.1980.036
TitleOutside Dia.Inside Dia.Thickness
220-458-0310.7210.40.031
300-866-0171.1250.1960.017
300-550-0200.3060.160.02
650-590-0300.3820.1420.03
675-59-0030.3660.2520.003
TitleOutside Dia.Inside Dia.ThicknessItem NameMaterial
815-201-0320.660.5120.032Special Flat Washers - CopperCopper
TitleOutside Dia. (min/max)Inside Dia. (min/max)Free Height (min/max)ThicknessMaterial
AB34-3001352.980/3.0001.000/1.0200.2020.135Stainless Steel

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