Are you looking to understand or blind fastener identification ?
The NE quadrant states the body diameter of the rivet shank, usually measured in increments of 1/32 of an inch. Right next to the size, it lists a letter denoting the position of the manufactured head:
represents a robust specification for flange bolts that eliminates the need for separate washers and provides superior vibration resistance. The technical PDF for this standard provides the precise blueprint for manufacturers and quality control engineers to ensure these fasteners perform safely under the high-stress conditions of automotive operation. nas523 pdf top
FASTENER CODEPublished byPublication DateNumber of PagesNAS06/30/201448 NAS523 Rivet Identification Guide | PDF - Scribd
Open your packing slip. If you received 8,000 bolts, your lot size is 8,000. Are you looking to understand or blind fastener
Go to Table II-A (Normal Inspection). Locate Code Letter "N." Read across:
NAS523 Rivet Identification Guide | PDF | Rivet | Sheet Metal - Scribd The technical PDF for this standard provides the
Because flush riveting is vital for minimizing aerodynamic drag, this quadrant defines exactly how the sheet metal skins should be shaped to accommodate the rivet head: : Countersunk hole preparation.
Features a raised dot ; requires heat treatment ("icebox" rivet).