1、NASM 6812-2006 fasteners, externally threaded alloy steel, corrosion resistant steel, aluminum 60,000 psi to 125,000 psi_AerospaceIndustriesAssociationFED SUPPLY CLASS1. SCOPE AND CLASSES 53GPThis specification defines the requirements for externally threaded fasteners manufactured fromthree differe
2、nt material types identified in TABLE I: 125 KSI UTS Min for alloy steel (TYPE 1) andcorrosion resistant steel (TYPE 2), and 62 KSI UTS Min for aluminum (TYPE 3).Receiving contractors may reject any manufactured lot which does not conform.Workmanship of fasteners shall conform with aircraft manufact
3、uring processes.Recommendations for improvements or corrections to this specification should be directed to theExecutive Secretary of the National Aerospace Standards Committee or a using member company.Specifications listed herein, of the issue in effect on date of inquiry are a part of this specif
4、ication to the extent indicated. In the case of conflict, the requirements herein shall take precedence.APPLICABLE DOCUMENTSFederal SpecificationsQQ-P-35 Passivation treatments for corrosion resistant steel.QQ-A-225, Aluminum and Aluminum Alloy Bar, Rod, Wire, or Special Shapes, Rolled, Drawn, or co
5、ld finished, General Specification for.QQ-A-430, Aluminum Alloy Rod and Wire, for Rivets and Cold Heading.QQ-P-416 Plating, Cadmium (Electrodeposited).Industry Standards2.2.1 Aerospace Industry Association of America, National Aerospace StandardsNASM1312 (MIL-STD-1312) Fasteners Test MethodsNASM1312
6、-1 (MIL-STD-1312-1) Fastener Test Methods, Salt SprayNASM1312-6 (MIL-STD-1312-6) Fastener Test Methods, HardnessNASM1312-8 (MIL-STD-1312-8) Fastener Test Methods, Tension TestNASM1312-13 (MIL-STD-1312-13) Fastener Test Methods, Double Shear Test2.2.2 American National Standards InstituteASME B46.1 S
7、urface Texture (Surface Roughness, Waviness, and Lay)ANSI/ASQC Z1.4 Sampling Procedures and Tables for Inspection by AttributesLIST OF CURRENT SHEETSNo Rev No Rev No Rev No Rev1242721012151811 1326191The Initial Release of this Document Supersedes MIL-B-6812, Revision E THIRDANGLEPROJECTIONPROCUREME
8、NT FASTENERS, EXTERNALLY THREADED CLASSIFICATIONSPECIFICATION ALLOY STEEL, CORROSION RESISTANT STEEL, ALUMINUM SPECIFICATION60,000 PSI TO 125,000 PSI NASM6812SHEET 1 OF 11 USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS O
9、R CERTIFYCONFORMANCE OF ITEMS PROCURED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION, OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS.THISDRAWINGSUPERSEDESALLANTECEDENTSTA
10、NDARDDRAWINGSFORTHESAMEPRODUCT ANDSHALL BECOMEEFFECTIVENOLATERTHANSIXMONTHSFROMTHEDATEOF THEAPPROVALSHOWNHEREON.CUSTODIANNATIONAL AEROSPACE STANDARD COPYRIGHT 2006 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVED1.11.2AEROSPACEINDUSTRIES ASSOCIATION OFAMERICA,INC.1000 WILSONBOUL
11、EVARD,SUITE1700ARLINGTON,VA22309-3901APPROVALDATE:DEC1999REVISION:MAR 22,2000 MARCH2006 1.31.42.2.1NATIONAL AEROSPACE STANDARDS COMMITTEE2.2122Copyright Aerospace Industries Association of America Inc. Provided by IHS under license with AIA/NAS Not for ResaleNo reproduction or networking permitted w
12、ithout license from IHS-,-,-/:#:#$#:$*:*:$#:# AerospaceIndustriesAssociation2.2.3 American Society for Testing and material SpecificationsASTM E 140 Standard Hardness Conversion Tables for MetalsASTM E 340 Standard Test Methods for Macroetching Metals & AlloysASTM E 407, Standard Test Practice for M
13、icroetching Metals and AlloysASTM E 1417, Inspection, Penetrant Method ofASTM E 1444, Standard Practice for Magnetic Particle Inspection.ASTM A 493, Specification for Stainless Steel Wire and Wire Rod for Cold Heading and Cold Forging2.2.4 Society of Automotive EngineersAMS-H-6088 Heat Treatment for
14、 AluminumAMS6300 Steel Bars and Forgings 0.25Mo (0.35-0.40C) (G40370) AMS6280 Steel Bars, Forgings, and Rings 0.50Cr - 0.55Ni - 0.20 Mo (0.28-0.33C) (G86300)AMS6322 Steel Bars, Forgings, and Rings 0.50Cr - 0.55Ni - 0.25 Mo (0.38-0.43C) (G87400)AMS6382 Steel Bars, Forgings, and Rings 0.95Cr - 0.20 Mo
15、 (0.38-0.43C) (G41400)AS3062, Bolts, Screws and Studs, Screw Thread RequirementsMilitary SpecificationsMIL-A-8625, Anodic Coatings, for Aluminum and Aluminum AlloysMIL-C-5541, Chemical Conversion Coatings on Aluminum AlloysMIL-H-6875 Heat Treatment of Steel, Process forMIL-S-6049, Steel, Chrome-Moly
16、bdenum (87400) Bars, Rods, and Forging Stock (for Aircraft)MIL-S-6050, Steel, Chrome-Molybdenum (86300) Bars, Rods, and Forging Stock (for Aircraft)MIL-S-6098, Steel, Chrome-Molybdenum (87350) Bars, Rods, and Reforging Stock (for Aircraft)MIL-S-6758, Steel, Chrome-Molybdenum (41300) Bars and Reforgi
17、ng Stock (for Aircraft)MIL-S-7742, Screw Threads, Standard, Optimum Selected Series, General Specification forMIL-S-8879, Screw Threads, Controlled Radius Root with Increased Minor Diameter,General Specification forMIL-S-18732, Steel Bars, Wire, Forging Stock, Forgings, Tubing, (431) Special Quality
18、TABLE I BASIC REQUIREMENTSMATL ENGINEERING TESTING REQUIREMENTS (SEE 3.1)TYPE REQUIREMENTS TEST METHOD SAMPLING PLANAMS6300 STEEL (G40370)AMS6280 STEEL (G86300)AMS6322 STEEL (G87400)1 AMS6382 STEEL (G41400) Per material specification. Check material MIL-S-6049 STEEL (G87400) Spectrographic analysis
19、composition for 25%MIL-S-6050 STEEL (G86300) for routine checking. (or more) of the parts MATERIAL MIL-S-6098 STEEL (G87350) Chemical analysis for used for metallurgical MIL-S-6758 STEEL (G413000) doubtful material. examination. 2 MIL-S-18732 CRES Not mandatory.QQ-A-225 ALUMQQ-A-430 ALUM1 After all
20、plating, coating, Conventional measuringDIMENSIONS 2 passivation, or surface methods. Per TABLE VII thru IX.3 treatment.Completely Revised NASM6812SHEET 2USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFYCONFORMAN
21、CE OF ITEMS PROCURED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION, OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS.2.3NATIONAL AEROSPACE STANDARD COPYRIGHT 2006 AEROSPACE
22、 INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVEDAEROSPACE INDUSTRIES ASSOCIATIONOFAMERICA,INC.1000WILSONBOULEVARD,SUITE 1700ARLINGTON,VA22309-3901CHARACTERISTICSAPPROVAL DATE:DEC1999 REVISION:MAR22,2000 THIS DRAWINGSUPERSEDES ALL ANTECEDENTSTANDARDDRAWINGS FORTHE SAME PRODUCTANDSHALLBECO
23、ME EFFECTIVE NOLATERTHANSIX MONTHS FROMTHE DATE OFTHE APPROVAL SHOWNHEREON.311Copyright Aerospace Industries Association of America Inc. Provided by IHS under license with AIA/NAS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:#$#:$*:*:$#:# AerospaceIndustries
24、AssociationTABLE I (CONTINUED)MATL ENGINEERING TESTING REQUIREMENTS (SEE 3.1)TYPE REQUIREMENTS TEST METHOD SAMPLING PLANBearing surface squareness1 shall be within 2 degrees for HEAD TO SHANK 2 fastener sizes under .500 inch Conventional measuringSQUARENESS 3 diameter and 1 degree for .500 methods.d
25、iameter fasteners and larger, FIM of the shank.1 Within 3% of either the widthHEAD TO SHANK across flats or the diameter Conventional measuringCONCENTRICITY of the head of clevis or eye methods.3 bolts.1 The depth of slots shall bemeasured from the highest Conventional measuringpart of the head to t
26、he methods.3 bottom of the slot.Top surface of hexagon head1 fasteners shall be chamfered HEX HEAD and approximately flat with Visual examination with FASTENERS the diameter of the top flat unaided eye.3 circle from 85% to 100%of the width across flats.13Unless otherwise specified,the surface textur
27、e of the Per ASME B46.1 byshank on close tolerance visual or fingernailfasteners shall be 63 RHR or comparison. In case ofSURFACE 1 finer and all other surfaces controversy, profilometer Per TABLES VII and IX.TEXTURE 2 shall be 125 RHR or finer. The may be used for checking3 surface texture, includi
28、ng the roughness if surface isshank, of all other type accessible.fasteners or bolts shall be 125 RHR or finerVisual examination 1 Per Part Standard to assure legibility. IDENTIFICATION 2 plus the manufactures Control stamp depth Per TABLE IX.3 logo if area permits. to assure max. is not exceeded.1
29、MIL-S-8879 or MIL-S-7742 Indicating gages,THREAD 2 as required by the applicable micrometer, caliper, Per TABLES VII and IX.3 part standard. and/or comparator.Shall develop the mechanical Test of mechanical and1 properties defined herein. metallurgical properties As indicated for each 2 per MIL-H-68
30、75. verifies heat treatment. test requirement.3 AMS-H-6088. See Note (a), TABLE I.Individual hardness readings Hardness test per shall be within the limits of NASM1312-6, Destructive test perRockwell 26 to 32 HRC (or See Note (b), TABLE I. TABLE X.equivalent per ASTM E 140).2 Not applicable Not appl
31、icable3 Not applicable Not applicableNASM6812SHEET 3USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFYCONFORMANCE OF ITEMS PROCURED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES NO REPRESENTATION OR CLAIM RESPECTI
32、NG (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION, OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS.AEROSPACE INDUSTRIES ASSOCIATIONOFAMERICA,INC.1000WILSONBOULEVARD,SUITE 1700ARLINGTON,VA22309-3901CHARACTERISTICSPer TABLES VII thru IX.2 Per TABLES VII thru
33、 IX.NATIONAL AEROSPACE STANDARD COPYRIGHT 2006 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVEDPer TABLES VII thru IX.Per TABLE VII.2APPROVALDATE:DEC 1999REVISION:MAR22,2000 MARCH 2006 Per TABLES VII thru IX.STRAIGHTNESS2SHANK Conventional measuringmethods.Per TABLE IV.THISDRAWI
34、NG SUPERSEDES ALLANTECEDENTSTANDARDDRAWINGSFOR THE SAMEPRODUCTAND SHALLBECOMEEFFECTIVE NOLATER THANSIX MONTHSFROM THE DATEOFTHE APPROVALSHOWN HEREON.Not applicableHEAD SLOTS 2HEAT TREATMENTHARDNESS1221Copyright Aerospace Industries Association of America Inc. Provided by IHS under license with AIA/N
35、AS Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-/:#:#$#:$*:*:$#:# AerospaceIndustriesAssociationTABLE I (CONTINUED)MATL ENGINEERING TESTING REQUIREMENTS (SEE 3.1)TYPE REQUIREMENTS TEST METHOD SAMPLING PLANMinimum tensile strengthsTENSILE 1 per TABLE II with limi
36、tations Static tensile test perSTRENGTH 2 per TABLE II notes or unless NASM1312-8. Per TABLE X.3 otherwise specified onthe Part Standard.Minimum shear strengths1 per TABLE II with limitations Double shear test perSHEAR STRENGTH 2 per TABLE II notes or unless NASM1312-13 Per TABLE X.3 otherwise speci
37、fied on the Part Standard.Magnetic Inspection perASTM E1444 circular and longitudinal methodNo cracks permitted in any after plating. Magneticlocation. A crack is a clean inspection not required Sample per TABLE VII, 1 crystalline break passing on fasteners of nominal increase to 100% if anyMETALLUR
38、GICAL 2 through the grain or grain diameter below .2500. indications are found 3 boundary. Other Penetrant inspection per in samples exceeding discontinuities permitted ASTM E 1417, Type I, the limits of TABLE VI.per TABLE VI. Method B. Penetrantinspection not requiredon fasteners of nominaldiameter
39、 below .2500.Shall be free from bursts, voids, and overheating. Specimens shall be cut 1 Alloy segregation which per Figure 1, etched perMICROSTRUCTURE 2 adversely effects the ASTM E 340 and Per TABLE X.3 mechanical or physical ASTM E 407, andproperties of the part is examined per 3.4.not acceptable
40、.Metallurgical examination.CARBURIZATION See 3.4 and Figure 1,OR transverse section.DECARBURIZATION3 Not applicable Not applicable Not applicable1 Rolled in a single rolling2 process and unless specified Comparator and other3 shall be right hand threads gaging methods.per FIGURE 2.Head shall be forg
41、ed except Metallurgical examination.Eye bolts may be machined. See 3.4.NASM6812SHEET 4USE OF OR RELIANCE UPON THIS DOCUMENT OR ANY NATIONAL AEROSPACE STANDARD IS ENTIRELY VOLUNTARY. AIA DOES NOT QUALIFY SUPPLIERS OR CERTIFYCONFORMANCE OF ITEMS PROCURED UNDER NATIONAL AEROSPACE STANDARDS. AIA MAKES N
42、O REPRESENTATION OR CLAIM RESPECTING (1) THE SUITABILITY OF ITEMS FOR ANY PARTICULAR APPLICATION, OR (2) THE EXISTENCE OF OR APPLICABILITY THERETO OF PATENT OR TRADEMARK RIGHTS.AEROSPACE INDUSTRIES ASSOCIATIONOFAMERICA,INC.1000WILSONBOULEVARD,SUITE 1700ARLINGTON,VA22309-3901CHARACTERISTICSAPPROVAL D
43、ATE:DEC1999 REVISION:MAR22,2000MARCH2006 1 Per TABLE III.NATIONAL AEROSPACE STANDARD COPYRIGHT 2006 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVEDPer TABLE X.THISDRAWINGSUPERSEDES ALLANTECEDENTSTANDARDDRAWINGS FORTHE SAME PRODUCTANDSHALLBECOME EFFECTIVE NOLATER THANSIX MONTHSF
44、ROMTHE DATEOFTHE APPROVALSHOWN HEREON.Per TABLE X.HEAD FORMING 1THREAD FORMING Per TABLE VII.2 Not applicable Not applicable Not applicable212Copyright Aerospace Industries Association of America Inc. Provided by IHS under license with AIA/NAS Not for ResaleNo reproduction or networking permitted wi
45、thout license from IHS-,-,-/:#:#$#:$*:*:$#:# AerospaceIndustriesAssociation COPYRIGHT 2006 AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA, INC. ALL RIGHTS RESERVEDTABLE I (CONTINUED)MATL ENGINEERING TESTING REQUIREMENTS (SEE 3.1)TYPE REQUIREMENTS TEST METHOD SAMPLING PLANPer QQ-P-416, Type II, Class Ap
46、ply non-destructive2 unless otherwise specified. Non-destructive test of test of coating 1 Plating thickness is subject coating thickness per thickness to everyto non-destructive test QQ-P-416. lot, sampling per method of QQ-P-416. TABLES VII and IX. All parts shall be capable ofpassing 96 hour Salt
47、 Spray Salt Spray Tests not 1 Test after Plating. No mandatory on every corrosion products lot but material FINISH shall appear. Salt Spray Test per handling and process Per QQ-P-35. All parts shall NASM1312-1. controls must be be capable of passing a four verified by Salt Spray hour Salt Spray test
48、. Minor Test of random2 corrosion products (staining) samples at intervals on nonbearing surfaces of the not to exceed thirty head and evidence of days in accordancepermissible discontinuities with QQ-P-416.are acceptable after the test.MIL-A-8625 or MIL-C-5541 MIL-A-8625.per applicable part standard. MIL-C-5541.Package to prevent nicking,scratching, or damage during handling, storage, ortransportation. Unit1 packages must containPACKAGING 2 parts of one part number Visual examination. Not applicable.3 and one manufacturing lotonly. Assortment of unit packages may be in largerpa
