INTERN ESP D-1 101-GS-2009 Slotted and Cross Recess Tapping Screws General Specifications (Noun Code 7450)《开槽及十字槽自攻螺丝 一般规范(名词代码7450)》.pdf

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. 2009 by Navistar, Inc. MARCH 2009 Page 1 of 7 NAVISTAR, INC. Engineering Standard Parts NUMBER: ESP-D-1.1

2、01-GS TITLE: Slotted and Cross Recess Tapping Screws General Specifications (Noun Code 7450) CURRENT ISSUE DATE: March 2009 WRITTEN/REVIEWED BY: Corporate Technical Standards APPROVED BY: Corporate Technical Standards SUPERSEDES ISSUE OF: August 2006 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED

3、FOR CURRENT REVISION Change Notice: Added note “Hexagon head and hexagon washer head specifications may be found in the specific preferred part documents, i.e., ESP-D-16.101-PP, ESP-D-17.101-PP, ESP-D-19.101-PP, and ESP-D-20.101-PP.” International Truck and Engine Corporation replaced by Navistar, I

4、nc. per corporate directive. GENERAL: This standard conforms in all essentials with the SAE Standard and the American National Standard for Slotted and Cross Recess Head Tapping Screws. SCREW TYPES AND APPLICATIONS: Screws covered by this standard include tapping screws of both the thread forming an

5、d thread cutting varieties. The type designations, descriptions and applications are as follows: Thread Forming Tapping Screws: Thread Forming Tapping screws are generally for application in materials where large internal stresses are permissible or desirable to increase resistance to loosening. The

6、y will be of the following types: Type AB (Preferred): Type AB tapping screws will have spaced threads, with same pitches as Type B, and a gimlet point. They are primarily intended for use in thin metal, resin impregnated plywood, and asbestos compositions. Type B (Non-Preferred): Type B tapping scr

7、ews will have spaced threads and a blunt point with incomplete entering threads. Type BP (Non-Preferred): Type BP tapping screws will have spaced threads the same as Type B but will have a conical point extending beyond the incomplete entering threads. They are intended for piercing fabrics or in as

8、semblies where holes may be misaligned. Type C (Non-Preferred): Type C tapping screws will have threads of machine screw diameter-pitch combinations approximating Unified Form with a blunt point and tapered incomplete entering threads. Type C tapping screws are not subject to thread gaging but will

9、meet dimensions specified in this standard. They are intended for application where the use of a machine screw pitch thread is preferable to the use of the spaced thread types of thread forming screws, or where chips from machine screw pitch thread cutting screws are objectionable. It should be reco

10、gnized that in specific applications, involving long thread engagement or hard materials, this type of screw may require extreme driving torques. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without licens

11、e from IHS-,-,-NUMBER: ESP-D-1.101-GS TITLE: Slotted and Cross Recess Tapping Screws General Specifications CURRENT ISSUE DATE: March 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are require

12、d to assume all patent liability. 2009 by Navistar, Inc. MARCH 2009 Page 2 of 7 Thread Cutting Tapping Screws: Thread cutting tapping screws are generally for application in materials where disruptive internal stresses are undesirable or where excessive driving torques are encountered with thread fo

13、rming screws. They will be of the following types: Types D, F, and T (Preferred): Types D, F, and T tapping screws will have threads of machine screw diameter-pitch combinations approximating Unified Form with a blunt point and tapered entering threads having one or more cutting edges and chip cavit

14、ies. The tapered threads of the Type F screw may be complete or incomplete at the manufacturers option; all other types will have incomplete tapered threads. Types D, F, and T tapping screws are not subject to thread gaging but will meet dimensions specified in this standard. Type F is used in appli

15、cations involving clogged tapped holes. Type T, in applications involving die castings. Type BT (preferred): Type BT tapping screws will have spaced threads with a blunt point and tapered entering threads, as on Type B, with one large cutting edge and chip cavity. These screws are intended for use i

16、n plastics, asbestos, and other similar compositions. HEIGHT OF HEAD: The head height in the dimensional tables represents a metal to metal measurement. In other words, on heads having rounded top surfaces, the truncation of the rounded surface due to recess or slot is not considered part of the hea

17、d height. On countersunk type heads, the height of the head is a reference dimension measured parallel to the axis of the screw from the largest diameter of the bearing surface of the head to the point of intersection of the bearing surface of the head and basic major diameter of the screw. This poi

18、nt of intersection may not necessarily be the same as the actual junction of head and shank. The height of undercut head will be covered under the heading “Short Length Screws.“ Hexagon head and hexagon washer head specifications may be found in the specific preferred part documents, i.e., ESP-D-16.

19、101-PP, ESP-D-17.101-PP, ESP-D-19.101-PP, and ESP-D-20.101-PP. BEARING SURFACE: The bearing surface of the head will be perpendicular to the axis of the screw shank within 2 degrees. DEPTH OF RECESS: The depth of recess in recessed head screws will be measured parallel to the axis of the screw from

20、the intersection of the maximum diameter of the recess with the head surface to the bottom of the recess. Recess penetration gaging depth values are included in the dimensional tables and the method of gaging and specifications for gages are covered in ESP-D-200.101-GS. Recess wobble gaging procedur

21、es and operating limits are also given in ESP-D-200.101-GS. SLOT DEPTH: The depth of slot in head will be measured, parallel to axis of screw, from the top of head to the intersection of bottom of slot with the head surface or bearing surface. ECCENTRICITY: The head will not be eccentric with axis o

22、f screw by more than 3 percent of the maximum head diameter. The slot or recess in the head will not be eccentric with axis of the screw by more than 6 percent of the basic body diameter or .015 inch (for Cross Recess Head), .010 inch (for Copyright Navistar International Corporation Provided by IHS

23、 under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-D-1.101-GS TITLE: Slotted and Cross Recess Tapping Screws General Specifications CURRENT ISSUE DATE: March 2009 This document is restricted and may not be sent outside Navistar, I

24、nc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. MARCH 2009 Page 3 of 7 Slotted Head) whichever is greater. Eccentricity is defined as one-half of the full indicator movement (FIM) LENGTH: The lengt

25、h of screw will be measured, parallel to axis of screw, from the largest diameter of the bearing surface of the head to the extreme point. Tolerance on Length Tapping Screws, Types AB and BP Nominal Screw Length Tolerance on Length Up to 1 inch, Incl. 0.03 Over 1 inch 0.05 Tapping Screws, Types B, B

26、T, C, D, F. and T Nominal Screw Length Tolerance on Length Up to 3/4 inch, Incl. -0.03 Over 3/4 to 1-1/2 inch, Incl. -0.05 Over 1-1/2 inch -0.06 SPACED THREADS: (Types B, AB, BP and BT). Thread form will be as shown below. The width of flat at crest of thread will not exceed .004 inch for size 8, or

27、 smaller, and .006 inch for larger sizes. MACHINE SCREW DIAMETER-PITCH THREADS: (Types C, D, F and T). Threads will approximate Unified Form and comply with dimensions specified herein, but will not be subject to thread gaging requirements. LENGTH OF THREAD: (Types AB, B, BP and BT). For screws of n

28、ominal lengths equal to 8 diameters or 1-1/2 inches, whichever is shorter, the full form threads will extend close to head such that specified minor diameter limits are maintained to within one pitch (thread) of the underside of the head, or closer if practicable (see below). Screws of longer nomina

29、l lengths will, unless otherwise specified, have a minimum length of full form thread equal to 6 diameters or 1.50 inches, whichever is shorter. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license

30、 from IHS-,-,-NUMBER: ESP-D-1.101-GS TITLE: Slotted and Cross Recess Tapping Screws General Specifications CURRENT ISSUE DATE: March 2009 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required

31、 to assume all patent liability. 2009 by Navistar, Inc. MARCH 2009 Page 4 of 7 (Types C, D, F, and T). Screws of nominal lengths equal to 3 diameters and shorter will have full form threads extending to within one pitch (thread) of the head, or closer if practicable (see above). For nominal lengths

32、exceeding 3 diameters; up to and including 8 diameters or 1-1/2 inches, whichever is shorter; the full form threads will extend to within 2 pitches (threads) of the head, or closer if practicable. Screws of longer nominal length will, unless otherwise specified, have a minimum length of full form th

33、read equal to 6 diameters or 1.50 inches, whichever is shorter. All dimensions are in inches. SHORT LENGTH SCREWS: Undercut Heads: Screws of nominal lengths equal to or shorter than C1, length in Table 1 and 3 will have undercut heads. Reduced Tapered Point: Screws of nominal lengths equal to or sho

34、rter than the tables specified below will have the length of tapered point reduced. Tables 1 and 2 “C1“ for Types B, BF and BT and “C2“ for Type BP Table 3 “C2“ Table 4 “C“ Impractical Lengths: Screws of nominal lengths less than the lengths listed in tables below for the various types are impractic

35、al. Table 1 “C1“ Table 2 “C2“ Table 3 “C3“ Table 4 “C“ FLAT AND OVAL HEADS (Types AB, B, and BP) Dimensions in inches: Table I Nominal Size C1 C2 G1 U R1 Point Length Constant* Nominal Screw Length Minimum Practical Length Head Side Height Point Taper Length Fillet Radius Type AB Type BP Type AB Oth

36、er Types Type AB Type BF Other Types Max Min Min Max Max Short Point Long Point 0 3/16 1/8 7/64 13/64 3/32 .025 .018 .031 .042 .009 .070 .105 .115 1 3/16 5/32 9/64 1/4 1/8 .031 .023 .036 .048 .011 .091 .133 .145 2 3/16 3/16 11/64 9 /32 5/32 .036 .028 .047 .062 .013 .119 .174 .190 3 7/32 7/32 3/16 21

37、 /64 3/16 .042 .033 .054 .071 .015 .139 .202 .220 4 1/4 1/4 7/32 3 /8 3/16 .047 .038 .063 .083 .017 .160 .233 .254 5 1/4 1/4 1/4 25/64 3/16 .053 .043 .075 .100 .019 .179 .264 .289 6 5/16 5/16 17/64 15/32 1/4 .059 .048 .075 .100 .021 .193 .281 .306 7 3/8 3/8 5116 17 /32 1/4 .064 .053 .079 .105 .023 .

38、211 .306 .333 8 7/16 7/16 21/64 39 /64 1/4 .070 .058 .083 .111 .025 .224 .324 .352 10 1/2 1/2 3/8 11 /16 5/16 .081 .068 .094 .125 .028 .256 .371 .402 12 9/16 9/16 13/32 25/32 3/8 .092 .078 .107 .143 .032 .296 .429 .465 1/4 5/8 5/8 15/32 7/8 3/8 .107 .092 .107 .143 .038 .335 .478 .514 5/16 13/16 5/8

39、19/32 61 /64 7/16 .134 .116 .125 .167 .047 .418 .592 .634 3/8 - 5/8 - 1- 1 /32 7/16 .161 .140 .125 .167 .056 - .706 .747 7/16 - 3/4 - 1-15 /64 5/8 .156 .133 .150 .200 .066 - .826 .876 1/2 - 3/4 - 1- 5/16 5/8 .156 .130 .150 .200 .075 - .938 .988 * Not a controlling limitation on product. Not applicab

40、le to Type AB screws. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-D-1.101-GS TITLE: Slotted and Cross Recess Tapping Screws General Specifications CURRENT ISSUE DA

41、TE: March 2009 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. 2009 by Navistar, Inc. MARCH 2009 Page 5 of 7 PAN, FILLISTER, TRUSS, HEX, AND ROUND HEADS

42、Types AB, B, and BP) Dimensions in inches: Table 2 Nominal Screw Size C1 C2 U Point Length Constant* Nominal Screw Length Minimum Practical Length Point Taper Length Type AB Type BP Types B, BF & BT Type AB Type BF Types B, BF & BT Min Max Short Point Long Point 0 5/64 3/32 5/32 5/64 .031 .042 .070

43、 .105 .115 1 5/64 1/8 11/64 5/64 .036 .048 .091 .133 .145 2 7/64 9/64 13/64 7/64 .047 .062 .119 .174 .190 3 9/64 11/64 1/4 9/64 .054 .071 .139 .202 .220 4 3/16 3/16 5/16 9/64 .063 .083 .160 .233 .254 5 3/16 3/16 21/64 5/32 .075 .100 .179 .264 .289 6 1/4 7/32 25/64 11/64 .075 .100 .193 .281 .306 7 5/

44、16 17/64 15/32 3/16 .079 .105 .211 .306 .333 8 5/16 9/32 31/64 3/16 .083 .111 .224 .324 .352 10 3/8 21/64 9/16 15/64 .094 .125 .256 .371 .402 12 7/16 3/8 21/32 9/32 .107 .143 .296 .429 .465 1/4 1/2 13/32 3/4 9/32 .107 .143 .335 .478 .514 5/16 1/2 17/32 53/64 5/16 .125 .167 .418 .592 .634 3/8 1/2 - 2

45、9/32 5/16 .125 .167 - .706 .747 7/16 5/8 - 1- 7/64 15/32 .150 .200 - .826 .876 1/2 5/8 - 1- 3/16 15/32 .150 .200 - .938 .988 * Not a controlling limitation on product. Not applicable to Type AB screws. FLAT AND OVAL HEADS (Types C, D, F, and T) Dimensions in inches: Table 3 C1 C2 C3 G1 N1 J1 U R1 No

46、mi- nal Screw Length Nomi- nal Screw Length Nominal Screw Length Nomi- nal Screw Length Head Side Height Total Head Height Slot Depth Point Taper Length Fillet Radius For Coarse Thread For Fine Thread For Coarse Thread For Fine Thread Max Min Max Min Min Max Min Max Min Max Max 2 3/16 3/16 11/64 5/3

47、2 .036 .028 .065 .050 .023 .031 .045 .062 .039 .055 .013 3 7/32 7/32 3/16 3/16 .042 .033 .075 .059 .027 .035 .052 .073 .045 .062 .015 4 1/4 1/4 7/32 3/16 .047 .038 .084 .067 .031 .039 .062 .088 .052 .073 .017 5 1/4 9/32 1/4 3/16 .053 .043 .094 .076 .035 .043 .062 .088 .057 .080 .019 6 5/16 5/16 17/6

48、4 1/4 .059 .048 .104 .084 .039 .048 .078 .109 .062 .088 .021 8 7/16 21/64 19/64 1/4 .070 .058 .123 .101 .045 .054 .078 .109 .069 .097 .025 10 1/2 27/64 11/32 5/16 .081 .068 .142 .118 .050 .060 .104 .146 .078 .109 .028 12 9/16 7/16 25/64 3/8 .092 .078 .161 .135 .056 .067 .104 .146 .089 .125 .032 1/4 5/8 33/64 13/32 3/8 .107 .092 .186 .158 .064 .075 .125 .175 .089 .125 .038 5/16 5/8 19/32 15/32 7/16 .134 .116 .232 .198 .072 .084 .139 .194 .104 .146 .047 3/8 5/8 47/64 1/2 7/16 .161 .140 .278 .239 .081 .094 .156 .219 .104 .146 .056 Copyrig