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Hexagon Castellated Plain Nut

Model / MPN: 556182-1 | NSN: 5310-00-720-7989
ITAR Registered seal

A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes nut (1), plain, slotted, hexagon.

Product Details
NATO Stock Number
5310-00-720-7989
Sold in multiples of
DEMIL
NO
Thread Class
3b
Thread Direction
Right-hand
Nut Style
Castellated, hexagon
Nut Height
Between 0.771 inches and 0.791 inches
Width Across Flats
Between 3.490 inches and 3.510 inches
Thread Series
Uns
Thready Qty Per Inch (tpi)
16
Thread Size
2.938 inches
Bearing Surface Type
Washer faced
Material
Aluminum alloy 7075
Material Specification
Qq-a-282 federal specification single material response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response
556182 Series Parts

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556182-1 Cross Reference