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multiple positioning holes, recessed face
2.750in. ⁓2-3/4"
1.1000in.
1.2500in.
straight
material:a/a; positioning facility bolt circle dia:2.375" nom.; positioning facility qty:3; hole thread size designator:5/16-18; thread hole location:flange; thread hole qty:3; securing method:threaded hole; bore counterbore feature:included; keying facility:not included; counterbore location:hub end; o/a outside dimension:3"; hub od:0.880" nom.; thread provision:threaded; thread size designator:5/8-11; recess depth:1.500" nom.; recess dia.:0.750" nom.; flange thickness:0.380" nom.; counterbore depth:0.125" nom.; counterbore dia.:0.690" nom.
A mechanical item used to connect a shaft and the mating member of a flexible or rigid coupling.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious metal content is unknown
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.