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4130 Steel Aircraft Flat Washers - Request for Information


4130 Steel:  is a molybdenum and chromium low alloy steel with properties that allow for easy hardening through heat treatment.   4130 steel provides notable structural strength and moderate heat resistance.


Aircraft:  deals with the development and manufacturing of products, structures, materials and devices used in aircrafts.  Aircraft  standards are established based on the extreme temperature, pressure and ware exposure faced in air operations.  


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
N402P52 N402P52 02.9801.2920.140
AN960-KD8 AN960-KD8 0REV 21 0.3750.1740.032
NAS1149BN316H NAS1149BN316H 7200REV 4 0.2500.1050.016
AN960-1016 REV21 AN960-1016 REV21 4615REV 21 1.1880.6400.063
MS15795-536 MS15795-536 0NASM15795 REV 1 4.7502.3750.193
AN960-D416 AN960-D416 25180REV 21 0.5000.2650.063
N401P27 N401P27 03.9802.3550.219
TitleOutside Dia.Inside Dia.Thickness
650-1725-0500.3390.220.05
650-4808-0891.3710.7550.089
910-61-0780.8750.3750.078
TitleOutside Dia.Inside Dia.ThicknessItem NameMaterial
560-756-0210.8590.7980.021Special Flat Washers - BrassBrass
TitleOutside Dia.Inside Dia.ThicknessMaterial
475-510-0312.031.7550.031Aluminum
475-224-0500.6230.2060.05Aluminum
TitleOutside Dia. (min/max)Inside Dia. (min/max)Free Height (min/max)ThicknessMaterial
BB20-1090451.083/1.103.396/.406.131/.1450.045Stainless Steel - 410

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