Material & Process
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| Dimpling | bents the sheet mechanicly being joint to accomodate the river head
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| AN470 | replaces almost all other head designs
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| AN430 | use on aircrafts build before 1955
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| AN455 | use on internal structures and applications requiring high head strengh
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| 1100 aluminum (A) | this rivet lacks suficient strengh for structural applications
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| 2117 aluminum (AD) | most used for manufacturing and maintenance modern aircrafts, don't requiere heat treatment also known as field rivets
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| 5056 aluminum (B) | for magnesium structures
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| 2017 aluminum (D) | modified to 2017 alloy call crack free rivet
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| AN | airforce Navy
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| MS | military standard
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| NAS | national aerospace standard
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| SAE | society american engeniers
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| SOLID CRACK RIVETS | unlike other type fasteners rivets change in dimention to fit the size of the hole
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| RIVET CODES | rivets are given codes for their size, head, and alloy material. Two system AN and MS20
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| AN 470 AD 4 5 | airforce navy, universal head, 2117T4 alloy, diameter 1/32, lenght 1/16
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| how do i measure AN470 rivet | from the bottom of the head to the end of the shank
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| how do i measure AN426 rivet | from the top of the head to the end of the shank
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| COUNTERSINK | a process in wich metal in the top sheet is cut away in the shape of the rivet head
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| CRACK FREE RIVET | a new version of 2017 (D) rivet for jet engines with a minumun shear stregh of 34ksi
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| AMERICAN NACIONAL SERIES | have more threads per inche
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| AMERICAN STANDARD UNIFIED SERIES | have less threads per inche
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| COARSE OR FINE THREADS | assigned by class to fit from 1 to 5
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| CLASS 1 | (loose) you can turn a nut all the way down with fingers like wing nuts
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| CLASS 2 | (free) need a wrench all the way down
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| CLASS 3 | (medium)need a wrench all the way down
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| CLASS 4 | (close) need a wrench all the way down
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| CLASS 5 | (tight)need a wrench all the way down
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| AIRCRAFT NUTS | are fine thread w/ class 3 whereas screws are tipically a class 2 or 3 fit
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| STANDARD AIRCRAFT NUTS | this are identified by diameter and lenght
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| AIRCRAFT BOLT MATERIALS | cadmiun plated-nickel steel-corrosion resistan steel-2024 alluminun alloy
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| AIRCRAFT BOLTS | unless specify this are made of cadium plated nicke steel, corrosion resistan is identify by the letter c between the diameter and the lenght and 2024 alluminum alloy a DD between the diameter and the lenght
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| ALLUMINUM ALLOY AND STEEL BOLTS SMALLER THAN AN3 | FAA forbids the use of this in structural components
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| A LETTER A AT THE END OF THE LENGHT OF A BOLT | this means there is no hole in the shank
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| AN73 - AN81 | (DRILL HEAD ENGINE BOLTS) BOLTS HEX-HEADED STEEL BOLTS SIMILAR TO AN3 TO AND 20
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| CLOSE TOLERANCE BOLTS | designated as an173 to an186 ground tolerance of +0.000 - 0.0005 inch
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| CLEVIS BOLT | an21 to an36 a domed head that is tipically slotted to accept a screwdriver the nut on most clevis bolts are safetied with a cotter pin.
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| IF NOTHING IS SPECIFY | it is a good practice to use awasher between the head of the nut and the nut to protect the material.
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| AN310 AIRCRAFT CASTLE NUT | identify by the letter D example an310d-6 2017 alluminum alloy
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| AN320 SHEAR CASTLE NUT | use only for shear loads on clevis bolts
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| AN315 PLAIN NUT | plain nut has no castallations a lock washer must be used, used for either tensil or shear loads.
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| AN350 WING NUT | it is use for frequenly removed parts with out tools example an350-616 where 6 is for 3/8 nut and 6/16 inch bolt class 2 (free)
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| SELF LOCKING NUTS | two types fiber or nylon and metal
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| LOW TEMPERATURE SELFT LOCKING NUT | AN365 class 3 (medium) nylon locknut never to be use in temperatures more than 250f if more than 3 threads expose (FAIL)
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| METAL SELF LOCKING NUT | for applications where the temp is more than 250f AN363
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| MACHINE SCREWS | widely use structural same strengh as bolts self-taping to join light materials
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| PLAIN WASHERS | AN960 provide smooth surface between the nut and the material
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| LOCK WASHERS | when no convinient to use self locking nuts
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| SPECIAL WASHER | keyed washer use as a sefety device, small keys to engage slots cut in to bolts
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