1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. DECEMBER 2008 Page 1 of 6 INTERNATIONAL TRUCK AND ENGINE CORPORATION Engineering S
2、tandard Parts NUMBER: ESP-E-47.201-GS TITLE: Prevailing Torque Hex Locknuts - Non-Metallic Insert General Specifications (Noun Code 5780) CURRENT ISSUE DATE: December 2008 WRITTEN/REVIEWED BY: Corporate Technical Standards APPROVED BY: Corporate Technical Standards SUPERSEDES ISSUE OF: February 2008
3、 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Change Notice: Added allowable finish of Zinc Trivalent plus Sealer (ZN8F). International Truck and Engine Corporation replaced by Navistar, Inc. per corporate directive. APPLICATION GUIDE: For general application where a prevail
4、ing torque nut is desirable the “all metal“ type in ESP-E-56.101-GS should be given first consideration primarily because of lower cost, absence of temperature limitations and advantages of one piece construction. The non-metallic type should be restricted to use where machined threads are involved
5、and then confined to the light, regular series, coarse thread, if at all possible. Non-metallic insert nuts are not to be used in conjunction with externally threaded components having drilled holes, milled slots, or keyways which the insert must pass over during assembly. GENERAL SPECIFICATIONS GEN
6、ERAL: A prevailing torque nut is one which is frictionally resistant to rotation due to a self-contained prevailing torque feature, and not because of a compressive load developed against the bearing surface of the nut or special under head design. “Locknut“ is a generic term used to identify the in
7、ternally threaded products covered in this standard and is not intended to imply an indefinite permanency of fixity. MISCELLANEOUS DIMENSIONS: Tops of hex will be chamfered from the boss diameter. Diameter of the bearing circle being the maximum width across flats within a tolerance of minus 5 perce
8、nt. The length of chamfer at hex corners will be from 5 to 15 percent. The surface of chamfer may be slightly convex or rounded. A rounding or lack of fill at junction of hex corners with chamfer will be permissible provided the minimum width across corners is reached and maintained beyond a distanc
9、e equal to 17.5 percent of the basic thread diameter from the chamfered face. Bearing surface of nuts will be flat with chamfered corners, and will be at right angles to the axis of the threaded hole within 1 for 1 inch size or smaller and within 1 /2 for larger sizes. (The maximum total runout of b
10、earing face equals the tangent of the specified angle times the width across flats.) Actual size across flats will be not less than specified minimum limit between two planes, perpendicular to the axis of the nut, spaced at a distance equal to .25 times hex thickness above and below the mid-plane th
11、rough the nut flats. NOT RECOMMENDED FOR NEW DESIGN Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-E-47.201-GS TITLE: Prevailing Torque Hex Locknuts Non-Metallic Inse
12、rt General Specifications CURRENT ISSUE DATE: December 2008 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. DECEMBER 2008 Page 2 o
13、f 6 The threaded hole will be a true position within a tolerance zone having a radius equal to .03 times the maximum width across flats, regardless of feature size, and will be countersunk on the bearing face. The maximum countersunk diameter will be the thread basic diameter plus .025 inch of 1/6 o
14、f thread basic diameter, whichever is smaller for 3 inch size or smaller; and plus .06 times the basic thread diameter for larger sizes. The minimum countersink diameter and depth will be such that no part of the threaded portion projects beyond the bearing face. THREADS: Unified Series, Class 2B (C
15、lass 3B acceptable). BASIC NUT MATERIAL: Steel - International Types 5 or 8 as indicated by part number and in accordance with CEMS A-31, Part II. Nut Factor = Proof load of Non-Metallic Insert Nut/Proof Load of Regular Hex Nut per CEMS A-31, Part II. Brass (BRS), C36000 per CEMS C-3. Stainless stee
16、l, Type 304 (SST-304) per CEMS A-37. INSERTS: Inserts will be fabricated from nylon or equivalent material suitable for use with temperatures up to 250F. The ID of the insert will be no smaller than the basic root diameter of the mating male thread. After assembly with mating thread the insert will
17、not experience any splitting, tearing, rotation, or separation from the nut. IDENTIFICATION: Special heat treated nuts shown in ESP-E-47.221-NPP (note 2) are identified with notched hex corners. FINISH: As designated by part number, nuts will be furnished plain, plated, or coated in accordance with
18、the CEMS and class listed below. Plain (PLN). Nickel Bright (NIB) CEMS G-19, Part III, Class 13 NIB. Zinc Trivalent (ZN6A) CEMS G-20, Class 6A. Zinc Trivalent plus Sealer (ZN8F) CEMS G-20, Class 8F. Phosphate Coating (PHC) CEMS G-1, Class B-2. RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 200
19、7, all product supplied to the requirements of this specification must comply with the requirements of the CEMS B-50 specification. PROOF LOAD TEST: Conducted as described in CEMS A-31, Part II. MINIMUM PREVAILING TORQUE “OFF“: After fifteen removals non-metallic insert nuts must meet the minimum pr
20、evailing torque off figures for fifth removal for Types 5 and 8 as shown in ESP-E-56.101-GS. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-E-47.201-GS TITLE: Prevail
21、ing Torque Hex Locknuts Non-Metallic Insert General Specifications CURRENT ISSUE DATE: December 2008 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008
22、 by Navistar, Inc. DECEMBER 2008 Page 3 of 6 LIGHT, REGULAR SERIES Dimensions in inches: C E D F G Type 5 Type 8 Nominal Width Across Flats Width Across Corners Thread Height Counter- sink Diameter Proof Load * Nut Proof Load * Nut Size & TPI Basic Max Min Ref Thickness Min Max lbs. Factor lbs. Fact
23、or 5 -40 1/4 .251 .243 .268 .148 .010 * * 600 1.00 940 1.00 6 -32 5/16 .313 .302 .344 .178 .010 * * 820 “ 1,100 “ 8 -32 11/32 .345 .332 .378 .229 .010 * * 1,250 “ 1,700 “ 10 -24 3/8 .376 .362 .413 .239 .010 * * 1,550 “ 2,100 “ 10 -32 3/8 .376 .362 .413 .239 .010 * * 1,800 “ 2,400 “ 1/4 -20 7/16 .439
24、 .428 .488 .313 .015 .180 .293 3,800 “ 4,750 “ 1/4 -28 7/16 .439 .428 .488 .313 .015 .182 .293 3,950 .90 5,450 “ 5/16 -18 1/2 .502 .489 .557 .344 .015 .200 .356 6,300 1.00 7,850 “ 5/16 -24 1/2 .502 .489 .557 .344 .015 .202 .356 6,300 .90 8,700 “ 3/8 -16 9/16 .564 .551 .628 .453 .015 .307 .418 9,300
25、1.00 11,650 “ 3/8 -24 9/16 .564 .551 .628 .453 .015 .310 .418 9,550 .90 13,150 “ 7/16 -14 5/8 .627 .615 .694 .453 .015 .315 .487 11,100 .87 15,950 “ 7/16 -20 5/8 .627 .615 .694 .453 .015 .331 .487 12,000 .85 17,800 “ 1/2 -13 3/4 .752 .741 .837 .594 .015 .434 .551 17,050 1.00 21,300 “ 1/2 -20 3/4 .75
26、2 .741 .837 .594 .015 .438 .551 17,450 .90 24,000 “ 9/16 -12 7/8 .877 .865 .978 .641 .015 .470 .614 21,100 .96 27,300 “ 9/16 -18 7/8 .877 .865 .978 .641 .015 .479 .614 22,150 1.00 30,450 “ 5/8 -11 15/16 .940 .928 1.051 .750 .015 .554 .676 27,100 “ 33,900 “ 5/8 -18 15/16 .940 .928 1.051 .750 .015 .61
27、0 .676 27,900 “ 38,400 “ 3/4 -10 1 - 1/16 1.064 1.052 1.191 .875 .015 .704 .812 40,100 “ 50,100 “ 3/4 -16 1 - 1/16 1.064 1.052 1.191 .875 .015 .705 .812 40,700 “ 55,950 “ 7/8 - 9 1 - 1/4 1.252 1.239 1.403 .984 .015 .812 .938 55,400 “ 69,300 “ 7/8 -14 1 - 1/4 1.252 1.239 1.403 .984 .015 .813 .938 55,
28、500 “ 76,350 “ 1 - 8 1 - 7/16 1.440 1.427 1.615 1.047 .031 .870 1.064 72,700 “ 90,900 “ 1 -12 1 - 7/16 1.440 1.427 1.615 1.047 .031 .872 1.064 72,300 “ 99,400 “ 1 -14 1 - 7/16 1.440 1.427 1.615 1.047 .031 .872 1.064 72,200 .97 101,950 “ 1-1/8 - 7 1 - 5/8 1.627 1.614 1.826 1.172 .031 .919 1.191 80,10
29、0 1.00 114,450 “ 1-1/8 -12 1 - 5/8 1.627 1.614 1.826 1.172 .031 .981 1.191 80,500 “ 128,400 “ 1-1/4 - 7 1 -13/16 1.815 1.801 2.038 1.391 .031 1.073 1.315 101,750 “ 145,350 “ 1-1/4 -12 1 -13/16 1.815 1.801 2.038 1.391 .031 1.106 1.315 100,800 “ 160,950 “ 1- 3/8 - 6 2 2.008 1.973 2.249 1.578 .031 1.22
30、7 1.467 121,300 “ 173,250 “ 1-3/8 -12 2 2.008 1.973 2.249 1.578 .031 1.230 1.467 123,500 “ 197,250 “ 1-1/2 - 6 2 - 3/16 2.197 2.159 2.416 1.609 .031 1.283 1.588 147,550 “ 210,750 “ 1-1/2 -12 2 - 3/16 2.197 2.159 2.416 1.609 .031 1.351 1.588 148,500 “ 237,150 “ * Dimensions not available. * * Compari
31、son of these proof loads on a percentage basis with proof loads for regular hex nuts as shown in CEMS A-31, Part II. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-E-
32、47.201-GS TITLE: Prevailing Torque Hex Locknuts Non-Metallic Insert General Specifications CURRENT ISSUE DATE: December 2008 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume al
33、l patent liability. 2008 by Navistar, Inc. DECEMBER 2008 Page 4 of 6 LIGHT, THIN SERIES Dimensions in inches: C E D F G Type 5 Type 8 Width Width Counter- Across Across Thread sink Proof * Proof * Nominal Flats Corners Height Diameter Load Nut Load Nut Size & TPI Basic Max Min Ref Thickness Min Max
34、lbs. Factor lbs. Factor 5 -40 1/4 .251 .243 .268 .109 .015 * * * * 6 -32 5/16 .313 .305 .339 .125 .015 * * * * 8 -32 11/32 .345 .336 .374 .172 .015 * * * * 10 -24 3/8 .376 .367 .410 .172 .015 * * * * 10 -32 3/8 .376 .367 .410 .172 .015 * * * * 1/4 -20 7/16 .439 .430 .482 .203 .015 .110 .293 1,880 .4
35、9 3,550 .75 1/4 -28 7/16 .439 .430 .482 .203 .015 .082 .293 2,290 .58 2,850 .52 5/16 -18 1/2 .502 .492 .552 .250 .015 .123 .356 3,570 .57 4,950 .63 5/16 -24 1/2 .502 .492 .552 .250 .015 .125 .356 3,700 .58 5,100 .58 3/8 -16 9/16 .564 .553 .622 .266 .015 .122 .418 4,770 .51 6,000 .51 3/8 -24 9/16 .56
36、4 .553 .622 .266 .015 .125 .418 4,970 .52 6,250 .47 7/16 -14 5/8 .627 .615 .694 .313 .015 .200 .487 7,650 .60 9,400 .59 7/16 -20 5/8 .627 .615 .694 .313 .015 .191 .487 7,720 .59 9,750 .55 1/2 -13 3/4 .752 .741 .837 .313 .015 .166 .551 8,800 .52 9,550 .45 1/2 -20 3/4 .752 .741 .837 .313 .015 .174 .55
37、1 8,790 .50 13,600 .57 9/16 -12 7/8 .877 .865 .978 .359 .015 .187 .614 11,650 .53 13,100 .48 9/16 -18 7/8 .877 .865 .978 .359 .015 .190 .614 12,100 .55 16,750 .55 5/8 -11 15/16 .940 .928 1.051 .391 .015 .218 .676 15,000 .55 16,900 .50 5/8 -18 15/16 .940 .928 1.051 .391 .015 .223 .676 15,650 .56 24,2
38、00 .63 3/4 -10 1 - 1/16 1.064 1.052 1.191 .406 .015 .250 .812 16,250 .41 24,000 .48 3/4 -16 1 - 1/16 1.064 1.052 1.191 .406 .015 .251 .812 16,700 .41 29,950 .54 7/8 - 9 1 - 1/4 1.252 1.239 1.403 .469 .015 .306 .938 23,200 .42 29,950 .43 7/8 -14 1 - 1/4 1.252 1.239 1.403 .469 .015 .308 .938 24,000 .4
39、3 42,600 .56 1 - 8 1 - 7/16 1.440 1.427 1.615 .547 .031 .360 1.064 31,050 .43 40,000 .44 1 -14 1 - 7/16 1.440 1.427 1.615 .547 .031 .377 1.064 32,100 .43 50,700 .50 1-1/8 - 7 1 - 5/8 1.627 1.614 1.826 .641 .031 .439 1.191 42,250 .53 50,600 .44 1-1/8 -12 1 - 5/8 1.627 1.614 1.826 .641 .031 .441 1.191
40、 43,850 .55 77,900 .60 1-1/4 - 7 1 - 13/16 1.815 1.801 2.038 .734 .031 .489 1.315 52,000 .51 77,800 .54 1-1/4 -12 1 - 13/16 1.815 1.801 2.038 .734 .031 .491 1.315 54,300 .54 96,550 .60 1-3/8 - 6 2 2.008 1.973 2.249 .790 .031 .473 1.467 56,000 .46 93,500 .54 1-3/8 -12 2 2.008 1.973 2.249 .790 .031 .4
41、76 1.467 58,350 .47 103,700 .53 1-1/2 - 6 2 - 3/16 2.197 2.159 2.416 .797 .031 .537 1.588 70,000 .47 118,000 .56 1-1/2 -12 2 - 3/16 2.197 2.159 2.416 .797 .031 .541 1.588 72,750 .49 129,350 .55 * Dimensions not available. * * Comparison of these proof loads on a percentage basis with proof loads for
42、 regular hex nuts as shown in CEMS A-31, Part II. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-E-47.201-GS TITLE: Prevailing Torque Hex Locknuts Non-Metallic Insert
43、 General Specifications CURRENT ISSUE DATE: December 2008 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. DECEMBER 2008 Page 5 of
44、6 HEAVY SERIES Dimensions in inches: C E D F G Type 5 Width Width Counter- Across Across Thread sink Proof * Nominal Flats Corners Height Diameter Load Nut Size & TPI Basic Max Min Ref Thickness Min Max lbs. Factor 1/4 -20 1/2 .503 .489 .556 .375 .015 .233 .293 4,570 1.20 5/16 -18 9/16 .566 .551 .62
45、4 .438 .015 .289 .356 7,550 1.19 3/8 -16 11/16 .691 .675 .763 .547 .015 .378 .418 11,100 1.19 7/16 -14 3/4 .754 .736 .829 .594 .015 .408 .487 15, 500 “ 1/2 -13 7/8 .879 .861 .969 .703 .015 .520 .551 20,400 1.19 9/16 -12 15/16 .942 .922 1.037 .797 .015 .537 .614 26,200 “ 5/8 -11 1- 1/8 1.067 1.045 1.
46、175 .859 .015 .635 .676 32,500 “ 3/4 -10 1- 1/4 1.255 1.231 1.382 1.000 .015 .807 .812 48,000 “ 7/8 - 9 1- 7/16 1.444 1.417 1.589 1.125 .015 .925 .938 66,530 “ 1 - 8 1- 5/8 1.632 1.602 1.796 1.281 .031 .977 1.064 87,000 “ 1-1/8 - 7 1- 13/16 1.820 1.788 2.002 1.438 .031 1.101 1.191 96,200 “ 1-1/4 - 7 2 2.008 1.973 2.209 1.641 .031 1.253 1.315 122,000 1.19 1- 3/8 - 6 2 2.197 2.159 2.416 1.797 .031 1.406 1.4
