Abstract: An improved nut fastener is utilize with a back-up plate to perfect a bolted flange joint. The fastener includes a cage having a planar body affixed to the back-up plate in bearing engagement with a surface thereof. Opposed sides upstanding from the cage body are configured to loosely capture a spherical faced washer, a spherical faced nut, and a nut anti-torque collar in self-aligning relation with a joint bolt hole. An extension of either the cage body or the collar is configured to engage the back-up plate in a manner to inhibit rotation of the cage.

Abstract: An article of improved oxidation resistance includes a metal base of a NiCr dispersion-modified alloy including, by weight, 15 - 30% Cr, 0.1 - 10% of oxides selected from oxides of the rare earth elements, particularly Th, Y and La, up to 1% of elements selected from Ti and Al, with the balance Ni and incidental impurities. To the base is applied a coating consisting essentially of, by weight, about 8 to less than about 14% Al, about 15 - 30% Cr, about 0.01 - 10% of elements selected from Y and Hf, with the balance essentially nickel and incidental impurities.