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iron, cast, 4.578 in. lg, 4.516 in. w, 1.031 in. lg cooling chamber, 8 fins w/3 deg taper ea side, 6 bosses 0.625 in. dia w/ 0.328 in. dia drill holes, 2 bosses 0.688 in. dia w/ 0.250-20 NC-2 tap holes, bore 1.000 in. dia spot face, 0.578 in. dia countersink, 14 mm tap, 0.500 in. dia tap drill thru 0.687 in. dp
An item designed to inclose the cylinder bore(s) of an engine block to form a combustion chamber(s). It may have liquid cooling passage(s) and/or air cooling fin(s) and may include valve(s), valve guide(s), rocker arm(s), and the like. It is a component part of an engine, gasoline. See also cylinder head, diesel engine.
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.