1、This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 8 NAVISTAR, INC. Material, Parts, and Proces pecifcations (MAS) NUMBER: PAS -E-56.
2、10-GS/PL Former Designation: SP-E-56.10-S TILE: Prevailng Torque Hex Locknuts Al Metal English Seris (Nun Code 5780) CURENT REV No.: 1506 DATE: June 2015 WRITEN/DITEDBY: Materials Engiering APROVED BY: Materials Engiering SUPERSEDS: -56.10-GS -July 201 PRINTED COPIS OF THIS DOCUENT UST BE VRIFED FOR
3、 CURENT REVISON This pecifcation may invole hazrdous materials, equipment, and procedures. This pecifcation does not purport o adres al of te safty isues asocited wit its use. The usr is rsonsibl to csult apropriate safty nd health practies and t etrmine the aplicbilt of rgulatry limits prior to us.
4、 Chnge Ntice: Chnged t New MPAS format; Combined GS, P, NP. 1.0 GENRAL: Prevailng torque type locknuts, as defined for this tandar, are al metal, one piec locknuts whic spi o frely ntil the lcing lmt ngaes the mting prt. Ths uts must be wreced to final psito. Ty wil lock in ay positon on a bolt rovi
5、ding the locking lmnt is fuly eged by the bolt hreads. Previlng trque lckuts d nt epd on the bolt beig loade for lcking action. The locking feature wil consit of thre constrictions equaly spaced or two constrictions diamtrialy oposd. The strictins usaly apear th top f th nical surfae, thugh two cnst
6、rictins n the upr portio f the flts dimtricaly site are prmisible. 2.0 CONTENTS: Page Genral 1 Matril 2 rkingThread Start 2 Bsic Dimensions earing Surface 2 Hol Cocentrity Cuntersik O Bearing Surface 2 Fiish Restricted Chemical Substances 2 Lubriation 3 Previlg Trque and Torque Tension Test olicy fo
7、r Selctig Parts fr Nw Desig 4 Surfae Discontiuites 5 Prof Load, Clamp Load, Tightenig Torque 6 revailng ON nd OF orque 7 Part List 8 Technical Information NUMBER: PAS -E-56.10-GS/PL TILE: Prevailng Torque Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navist
8、ar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 8 3.0 MATERIAL: Thes nuts are avilable in thre strength grades, International Types 1, 5, and 8, (aproximate IF Grades A, B nd C) pr MPAS F-31,
9、 Prt I. Type 8 nuts with ardnes in exces of Rockwel C32 plated with metal must be suitably treatd to reliv hydrogen mbritlmt. For convenice, prof load requiremnts are shown i the Prof Load, Clamp Load Table in the dumt. 4.0 MARKING: Type 1 locknuts are not required to be marked for grade identifcati
10、on. Type 5 - thre equaly or symetricaly spaced; raised projections must apear on top of the conical surfac for grde identifcation. Type 8 -Six equaly or symetricaly spaced; raised projections must apear on top f the conical surfac for grad identifcation. Double projections at one or more locations,
11、radil or cirumferntial inear marks or letrs in lcking cnstritis r crrs ay be used for source identifcatio. 5.0 THREAD START: Constriction f the locking feature wil be such tat nuts 3/8 inch size and smaler wil asemble a miium f on alf tur, nd siz 7/16 in and lrger a miium of e ful turn, by hnd, on b
12、sic “GO“ thred plg age. The plug age wil be without a chip grv, and wil ave a pit with dimensions confrmin to tose for th point n ex screws as specifed in Itrntional Engirig Stadar Parts Bk, Sctin B. 6.0 BASIC DIMENSIONS: Prevailng torque locknuts wil confrm to the dimensions given i the Dimensions
13、Table in this documet. Th prti of the lkut cntainig th prevailg torqu featur ay hv a special ntor witin te maxium prmited width cros flats nd thicknes. Th minium width aros flats il ot aply t depresd portion f loknut t prevailng torqu feature. 7.0 BEARING SURFACE: Bearing surface wil be flat with ca
14、mferd corners and square with axis of threade hole pitch ylindr sch tt otal runout over bering cirle is withi “Bering Surfce TIR“ sown i th Dimesios Table in this docment. 8.0 HOLE CONCENTRICITY: he axis of pitch cylinder of threade hole wil be concentric with axis of nut within I specifed in the Di
15、mensios Tabl in tis ocumnt (3% maxium idt crs flats). 9.0 COUNTERSINK ON BEARING SURFACE: The threade hole wil be countersunk on the bearing surface. The diametr of countersink wil not xc th trad basic (majr) diametr plus .03 ich for sizs 3/8 inch and smalr of 1.08 times the thread basic imetr for l
16、rger sizs. 10. FINISHES: Nuts wil be furnished plated or coated in acordance with te specifcation below. Phosphate Coating (PHC) MPAS G-1, Clas B2. Zinc Aluminu Clear (ZALR) MPAS G-4518, Type I. 1.0 RESTRICTED HEMIC SUBSTNCES: Efective January 1, 207, al product suplied to the rquiremnts of this pec
17、ifcation must comply with te rquiremnts of the MPAS B-50 spcifcatio. NUMBER: PAS -E-56.10-GS/PL TILE: Prevailng Torque Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquir
18、d to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 8 12.0 LUBRICATION: To miniize galing during asembly and promte uniform performance, cadmiu plated nuts wil be coatd with a splental urict flwig plating whic wil b len and ry to the touh. Lubricant wil not detriorate due to temer
19、ture and umidity varitios o as t afct nt performe for a peri f n yar whn uts ar stor, shipe, or hndle in nrml aer. 13.0 PREVAILNG TORQUE AND TORQUE TNSION TEST: 13. Test Conditons: Section through Typical Test Machine (Hydraulic Load Cel) The same grade stel bolt and ut should be used for testing (T
20、ype 5 bolt with Type 5 nut). The tst bolt usd in th prvailg torqe tst wil have a zic phoshate and oil finish witout any aditonal ubrication such as il, grease, or wx whi wuld ltr frictinal carcteristics of threads. Bolt hreds wil be Unifed Sris Clas 2A roled, on sizes 1 inh dimetr nd smaler. Tst was
21、hers wil be no-rotaing (squre washrs are rcomee), hare, with elctrodepositd zinc platig. A new test bolt and test washer wil be used for testing each nut. 13.2 Testing: Al torque specifcations tabulated in the Prof Load nd Prevailng on and of torque tabls aply nly to lknuts havig th rquird plating,
22、lubrication, d asemble as ilustratd under test coditns. A had torque wrench or mechical drive uit wil b usd for l asembly a isasembly operations. Driving spd ust not exe 30 rpm and wil be cntiuos and uniform. On iital sembly, the maxium prevailng torque “on“ wil be rcorde and wil not exced the preva
23、ilng torqu first i on, specifd i the Prvailg on and f torque table. The nut wil be tightend aginst the hardend washer until the specifed clamping load is dvloped in th olt. The torque csry to evlop tis load wil b rored ad must be within th specifed limits fr tightnig torque. The nut wil then be acke
24、d of until the tnsile load in the bolt has ben reduced to zero r an xial play of .031 ic mxium is obtaind. Thr must percptil drag or trqu ncouterd thrughut he next 360 degres f rotaion ad the aximu and minium tre obtaid wil be recorde. T maxium torque wil t b ls than the first reoval “higst reaing“
25、NUMBER: PAS -E-56.10-GS/PL TILE: Prevailng Torque Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 4 o
26、f 8 prevailng torque “of“ (as pecifed on i the Prevailng on and of torque table) and in adito, wil nt b les thn 40% of the actual pril trque “o“ uring first instltio. The nut il be rasembled and removed four more times. On each reasembly, the nut wil be asmbled to aproxiatly the iital a psitn withou
27、t iduing ny clap load i the olt. This portin f the tst ned not be conducted in the load cel, howevr, wher the l cel is used; te tst washer wil be rmved. Rgarls of t mth usd, caution must b xrisd to avoi ngaing t locking lnt of the nut with blt reads not previsly contacted. The mxium ad miium prevail
28、ng torque “f“ il e measur o each asembl ad rmoval. During the fith reoval, thr must be prcptible torqu throghut first 360 degres f rtio ad t maxium nd ini torque wil recrde. Tis torque must not b ls than the specifed previlng torque “of“, fith tim of. Suficent ime wil elapse btwen torquing cyles to
29、prevnt over heating of the tst asembly. Prevailng Torque “Of“ il be measured on each asembly and removal nd wil confr with th typical curv ilstrated low. Aplications Typical Curve of Prevailng Torque on Removal versu Times Aplied Note: 1st of through 5th of may be constant or diminishing after ach s
30、ubsequent aplication. If th tst blt is fre f ttal decrurizati d the above curv hs pronncd swing, thread galing is indicatd and ut wil be sbject o rejctin. 14.0 POLICY FOR SELCTING PARTS FOR NEW DESIGN: Aproved parts are so designated to reduce variety of parts and asure maxium avilabilty, interchang
31、abilty nd cst vigs in volm buing. For new design, parts hal be slectd from “Aproved“ part list only. Material: Types 5 and 8 Thrd: Unifd Seris, Coarse Finishes: Zic Aluminu lr (ZACLR) Phosphate Coated (PH) Sizes: 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 1, -1/4, and 1-/2 NUMBER: PAS -E-56.10-GS/PL TILE: Preva
32、ilng Torque Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 8 15.0 SURFACE DISCONTIUITES: tel nu
33、ts in al sizes wil confrm to alowable limits hown in E Recomende Practie J12. Dimensions in iches: Nominal Size Threads Per Inch C E D D Height of Hex Diametr of Bing Surface Angula- rity of Beaing Surfce TIR Hole Cnc- trity TIR Identi- fica- tion Mark Di Identi- Width Acros Cnes Thicknes yps 1 & 8
34、Thicknes yp 5 fica- tion Mark Height Nom Max Min Max Min Max Min Max Min Min Max Min Max Max in in 1/4 20 7/16 .4375 .428 .50 .48 .26 .21 .257 .21 .145 .438 .416 .01 .015 .01 .04 */ 8 / . . . . . . . . . . . . . . . 5/16 1 1/2 .50 .489 .57 .57 .273 .258 .302 .258 .16 .502 .475 .01 .017 .012 .05 */ 2
35、4 / . . . . . . . . . . . . . . . 3/8 16 9/16 .5625 .51 .650 .628 .37 .320 .37 .320 .198 .564 .534 .012 .02 .015 .06 */ 24 / . . . . . . . . . . . . . . . 7/16 1 1/6 .6875 .675 .794 .768 .385 .365 .430 .365 .23 .689 .653 .013 .024 .017 .07 */ 20 / . . . . . . . . . . . . . . . 1/2 13 3/4 .750 .736 .
36、86 .840 .48 .427 .510 .427 .26 .752 .712 .014 .026 .02 .08 */ 20 / . . . . . . . . . . . . . . . 9/16 1 7/8 .8750 .861 1.0 .982 .496 .473 .5 .473 .286 .87 .830 .015 .03 .02 .09 */ 8 / . . . . . . . . . . . . . . . 5/8 1 15/6 .9375 .92 1.083 1.051 .59 .53 .645 .53 .329 .93 .890 .016 .032 .025 .01 */
37、8 / . . . . . . . . . . . . . . . 3/4 10 1- /8 1.250 1.08 1.29 1.240 .65 .617 .750 .617 .382 1.27 1.069 .018 .039 .03 .012 */ 6 - / . . . . . . . . . . . . . . . 7/8 9 1- 5/16 1.325 1.269 1.56 1.47 .76 .724 .862 .724 .450 1.34 1.246 .02 .045 .03 .012 */ 14 - / . . . . . . . . . . . . . . . 1 8 1- /2
38、 1.50 1.450 1.732 1.653 .87 .831 .958 .831 .513 1.502 1.425 .02 .052 .03 .012 14 - / . . . . . . . . . . . . . . . *1-/8 7 1-/16 1.6875 1.631 1.94 1.859 .9 .93 1.079 .93 .576 1.689 1.603 .025 -/ 12 -/ . . . . . . . . . . . . 1-/4 7 1- 7/8 1.8750 1.82 2.165 2.06 1.094 1.03 1.75 1.03 .628 1.87 1.781 .
39、028 *-/ 12 - / . . . . . . . . . . . . *1-3/8 12 2-1/6 2.0645 1.94 2.382 2.73 1.39 1.38 .681 2.064 1.95 .031 -/2 6 - /4 .0 2.75 .59 .480 .7 .245 1.57 1.245 .75 .52 2.38 .4 *1-/ 12 2- 1/ 2.5 .1 2.8 2. 1.3 1. . . . 2. .1 .03 * NO-PREFRED * NOT RECOMENDE NUMBER: PAS -E-56.10-GS/PL TILE: Prevailng Torqu
40、e Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty. 2015 by Navistar, Inc. JUNE 2015 Page 6 of 8 16.0 PROF LOAD, CLAMP LOAD, TIGHTENIG TORQUE
41、: Nominal Size & Threads P Inch Type 1 Type 5 Type 8 Type 5 Type 8 Prof Lad lb *Clamp Lod lb Prof Lad lb *Clamp Lod lb Prof Lad lb *Clamp Lod lb Locknut Tighteig orqu Locknut Tighteig orqu Max Min Max Min 1 /4 -20 2, 850 1,30 3,80 2,0 4,750 2,850 84 lb in 60 lb i 126 lb in 84 lb in / -8 3, ,5 4,5 ,3
42、 , 3, 7 l i 3 l in l i l i 5/16 -1 4,70 2,10 6,30 ,50 7,850 4,70 162 lb in 120 lb i 192 lb in 132 lb in / -24 5,2 ,4 ,95 3,7 , 5,2 l i l in 4 l i 4 l i 3/8 -16 7,0 3,20 ,30 4,950 1,650 6,90 19.5 lb ft 14.5 lb ft 29 lb ft 21 lb ft / -24 ,9 ,6 1,5 ,6 3, 7, 2 l ft 6 l ft 30 l ft l It 7/16 -1 ,50 4,0 2,
43、70 ,80 15,90 9,60 3.5 lb ft 24.5 1b ft 4 lb ft 32 lb ft / -20 10,7 ,9 14, 7,5 7,8 1,7 l ft . ft 5 l ft l ft 1/2 -13 2,80 5,80 7,05 9,0 21,30 2,80 50 lb ft 37 lb ft 6 lb ft 49 lb ft / -20 14, 6, 19,2 1,2 4, 14, 2 l ft 8 l ft 9 l ft 51 l ft 9/16 -1 6,0 7,50 ,850 ,60 27,30 6,0 69 lb ft 51 lb ft 5 lb ft
44、 70 lb ft / -8 18,3 8,3 24, 13, ,45 18,3 75 l ft l ft 10 l ft 5 l ft 5/8 -1 20,50 9,0 7,10 4,50 3,90 20,0 9 lb ft 70 lb ft 2.5 lb ft 90 lb ft / -8 3, 1,5 3, 16,3 8,4 3, 7.5 l ft 2.5 l ft 130 l ft 5 l ft 3/4 -10 0,50 ,40 40,10 2,0 50,10 0,10 1 lb ft 1 lb ft 2 lb ft 1 lb ft / -6 3, 12, 6 ,8 3, 8 ,95 3
45、,6 65 l ft 20 l ft 10 l ft 5 l ft 7/8 -9 41,50 3,80 5,40 29,50 6,30 41,0 20 lb It 185 lb ft 3 lb ft 230 lb ft / -14 ,8 15, 4 61, 3, 4 7,5 5,8 7 l ft 20 l ft 10 l ft l ft 1- 8 54,0 , 0 72,0 8, 70 90,0 4,60 380 lb ft 8 lb ft 46 lb ft 340 lb ft -4 61,2 16,8 81,5 43, 1,5 1, 42 l ft 310 l ft 95 l ft 65 l
46、 ft 1-/8 - 7 8,0 ,90 0,0 2,10 4,0 69,0 -/ -12 7,5 21, 89, 47,5 128, 7,8 1-/4 - 7 8,20 4,0 10,750 3,0 45,30 ,0 -/ -12 96,5 26, 3, 59,7 160,9 96, 1-3/8 -6 104,0 8,70 12,0 63,80 73,250 104,0 -/ -12 8,35 32,5 38, 72,9 19, 8, 1-/2 -6 126,40 4,80 147,50 ,60 20,750 127,0 -/ -12 ,3 39,1 6, 87, 3,1 4, * NOTE
47、: The tightenig torques and clamp loads hown aply only to the combination f laboratory conditons described undr Tst Cnditns. Torque values must be djusted t mt ther codits, uch s difert platigs or coatings, difert surface aginst whic th nut is torque, etc., tat may be nconter in actual licatin. 16.
48、Definitons: Prof Load: The specifed test load fastenr must withstand, without hread striping or uptre, Clamp oad: The test tensile load evloped in the tst bolt, as the locknut is tightend. Mesuring is on on a load masuring ic th test bolt is munted in. T lamp loads ow qal 75% of the prf ls pecifed f
49、or Types 1, 5 and 8 bolts i MPAS F-31, Prt I. Locknut Tightenig Torque: The torque that is necsary to devlop the specifed clamp load in a trqe tnsio tst. NUMBER: PAS -E-56.10-GS/PL TILE: Prevailng Torque Hex Lockout Al Mtal REVISON: 1506 This document is restricted and may not be snt outside Navistar, Inc. or eproduced without permision from Corprate ecnial Stadars. Suplirs re rquird to asme al ptent libilty.
