This specification covers premium quality bolts and screws made from a low-alloy, heat-resistant steel and having threads of UNJ (MIL-S-8879) form. This document is stabilized for use only in non-aerospace applications. FAA Advisory Notice 20-127 considers bolts made from H11 material to be unsafe for aircraft use and instructs that if used they should be replaced with a different material.
Bolts and Screws, Steel, Low-Alloy Heat Resistant 222,000 psi (1517 MPa) Tensile Strength Hardened and Tempered, Roll Threaded
2017-08-17
Conference paper
English
BOLTS AND SCREWS, STEEL, LOW ALLOY, HEAT RESISTANT Hardened and Tempered, Roll Threaded
SAE Technical Papers | 2004