This specification defines the requirements for alloy steel externally threaded fasteners procured under part numbers listed on drawings which refer to this specification. Typically these fasteners are used for tension@ shear@ and tension-fatigue applications where 180 KSI Ftu and 108 KSI Fsu is desired with a service temperature capability to 450??. Receiving contractors may reject any manufacturing lot whit does not conform. The specification includes mechanical property requirements for two classes of fasteners as follows: Type I - Tension head (hex@ double hex@ 12 spline@ etc. without an internal or recess drive) and studs. Type II - 100??ull flush head and internal wrenching (pan@ fillister@ brazier@ etc.) head configuration. Workmanship of fasteners shall conform with aircraft fastener manufacturing processes. Recommendations for improvements or corrections to this specification should be directed to an NASC representative of a using company or to the Executive Secretary of the National Aerospace Standard Committee. Specifications listed herein@ of the issue in effect on date of inquiry@ are a part of this specification to extent indicated. In the case of conflict@ the requirements herein shall take precedence. Unless otherwise specified@ part inventory manufactured to MIL-B-8831 or previous revisions of the applicable drawing or specification may be procured and used until stock is depleted.