1、STANDARD PARTS SECTION AA - DIMENSIONAL 8 GAGING TABLE OF CONTENTS PAGE Thread Data Tapping Screw Threads - Types AB, A, B, a slight rounding or truncation of the point is desirable. The tabulated values for point diameter apply to screw blank before roll threading. DECEMBER 199 1 PAGE AA- 125.01 St
2、andard Parts TAPPING SCREW THREADS TYPESAB, A, B, AND BP GENERAL SPECIFICATIONS (Contd. ) For types AB, A, B, a-nd BP, except for Type A having trim head styles, of nominal lengths equal to 8 diameters or 1.50 inch (38) whichever is shorter, the full form threads shall extend close to the head such
3、that the specified minor diameter limits are maintained to within one pitch (thread) of the underside of head, or closer if practicable. Screws of longer nominal lengths shall have a minimum length of full form thread equal to 6 diameters or 1.50 inch (38) whichever is shorter. For trim head Type A
4、tapping screws up to and including No. 12 (5.5) body size having nominal lengths of 1.0 inch (25.4) or less, the full form threads shall extend close to the head such that the specified minor diameter limits are maintained to within one pitch (thread) of the underside of the head, or closer if pract
5、icable and on nominal lengths greater than 1.0 inch (25.4), the length of full form thread shall be such as to provide an unthreaded shank length of 0.50 inch (l2.7), plus 0 and minus 2 pitches weads). The length of the screw shall be measured parallel to the - .O I5 APPROX WASHER FACE OPTIONAL TYPI
6、CAL LOCATION FOR MANUFACTURERS IDENTIFICATION GRADE IDENTIFICATION, FOR GRADE 8 FOR GRADE 5 Nominal Size 1/2 7/16 3 /8 5/16 1/4 .2 500 I .5000 .437 5 .3750 .312 5 E .4930 .4305 .3690 .3065 .2450 Body Diameter * F 1 Width Across Flats .4375 1 : I .5625 .62 50 .7500 1 .4280 .5510 1 .6120 1 .7360 I I I
7、 I I I G .840 .698 .628 .557 . .488 Width Across Corners (Min.) - H Fillet Radius R Head Height -163 .009 .009 .009 - 009 .009 .023 .023 .023 -023 -023 .302 .272 .226 - 195 .150 .323 .291 .243 -211 Nominal Size I 9/16 I 5/8 I 314 I 7/8 E 1 Body Diameter * .5625 -6250 .7500 .8750 1 .5545 1 ,6170 1 .7
8、410 I .8660 F Width Across Flats .8125 -9375 1.1250 1.3125 1 .7980 I .9220 1 1.1000 1 1.2850 G 1 Width Across Corners (Min.) I .910 I 1.051 11.254 11.465 H I Head Height R 1 Fillet Radius .041 1 I .041 .062 1 * Dimension E is applicable for long bolts shown on Pages I .117 I .137 For Screws With Sho
9、ulder E I M2 * Recess Diameter .194 .194 .181 * * .207 * I T2 * Recess Depth .126 .121 .lo8 * * ,139 * N2 I Recess Width (Min.) * * * * * * Driver Size * * * * * * Recess Penetration .lo4 .091 Gam- Depth 2 .122 .lo9 * * * * * Dimensions are the same as those specified for screws without Shoulder E.
10、All dimensional specifications and general specifications are the same as shown on Pages AA-140.31-. 32 with the exception that the recess penetration gaging values are as shown above. For recess penetration gaging method and equipment see page 2-131.01. APR 1967 PRlNiED IN U.S.A. PAGE AA- 140.33 St
11、andard Parts G H Head Diameter Head Height . ZLY . LlV .205 now nvn .097 .080 .256 PAN HEAD TYPE 1 CROSS RECESSED Nominal Size I4. 8) I6(3.5) I 3/8(9;5) 5/16(7.9) 1/4(6.3) 12(5.5) lO(4.8) S(4.2) I I n-h I n-rr .322 .261 .218 .175 .151 .133 .115 .716 .594 .473 .407 .357 .306 .740 .615 .492 .425 .373
12、.VI u . UOI .lo5 .122 .040 .040 .035 .025 .020 .015 ,015 .010 Radius (Min.) R .652 .527 .373 .323 .284 .244 .207 .173 Radius (Ref. ) Q .244 .203 .162 .139 .182 .199 .259 .281 .350 .389 .186 .246 .376 .337 .268 1 oo I cc .en M T Recess Diameter Recess Depth .ILL . LOW .lo9 ncr nrn .091 .078 .153 I ,1
13、03 1.108 I .124 I .141 I .161 I .193 1.233 I I .190 .149 .118 .098 -089 .071 .055 .053 Gaging Depth .213 .173 .144 .124 .113 .097 .080 .071 Recess Penetration 4 4 3 3 2 2 2 1 Driver Size .065 .059 .036 .034 .031 .030 .028 .019 N 1 Recess Width (Min.) .210 ,169 .135 .115 .lo0 -082 . uvu uuu NOTE: ( )
14、 Nominal Size in Millimeters. GENERAL SPECIFICATIONS The height of head indicated above represents a metal-to-metal measurement. In other words, the truncation of the rounded surface due to the cross recess is not considered part of the head height. The bearing surface of the head shall be at right
15、angles to the axis of the screw shank within 2 degrees. The eccentricity of the head with the axis of the screw shall not be more than 3 percent of the maximum head diameter. The eccentricity of the cross recess with the axis of the screw shall not be more than 6 percent of the basic screw diameter
16、or 0.015 inch, whichever is greater. The radius of the fillet under the bearing surface of the head shall be no greater than 15 percent of the basic screw diameter. The depth of cross recess Qenetration gaging) shall be measured parallel to the axis of the screw shank and shall be in accordance with
17、 values as shown above. For recess penetration gaging method and equipment see pages 2-130.01-. 02. For general specifications, dimensioning convention, and tolerances not otherwise defined, refer to current applicable SAE Standard. Specifications for this head type were developed without considerin
18、g whether patents may or may not be involved. In all cases, therefore, the supplier shall be required to assume patent liability. 0 SEPT 1975 Product Engineermg PAGE AA-140.41 Standard Parts PAN HEAD TYPE 1A CROSS RECESSED I Nominal Size 6(3.5) 4(2.8) 1 M 1 Recess Diameter .122 .162 I .lo9 I .149 1
19、I I I I T I Recess Depth Recess Penetration Gage Depth .058 f 1 . - S(4.2) .191 .159 .139 .124 .lo8 .328 .260 .241 .180 .164 .341 .273 .254 .193 .177 5/16(7.9) 1/4(6.3) 12(5.5) lO(4.8) .090 .lo6 .121 .141 .173 .041 .164 .137 .117 .lo8 .092 4 3 3 2 2 .086 .057 .056 .041 .074 .090 .099 .119 .146 .210
20、.183 GENERAL SPECIFICATIONS All dimensional specifications and general specifications are the same as shown on Page AA-140.41 with the exception that the recess penetration gaging values are as shown above. For recess penetration gaging method and equipment see Page 2-131.01. PAGE AA-140.42 Product
21、Engmeertng SEPT 1975 1- Standard Parts GENERAL SPECIFICATION HEXAGON HEAD (MACHINE SCREWS) INDENTATION OPTIONAL GRADE IDENTIFICATION / FOR GRADE 5 Dimensions in Inches, GRADE IDENT I F ICAT ION FOR GRADE 5.1 I Nominal Size 0 * Dimensions are the same as for Heads without Washer Assemblies. r (Contin
22、ued) AUG 1973 Product Engineering PAGE AA-140.51 1- Standard Parts GENERAL SPECIFICATIONS (Contd) HEXAGONHEAD (MACHINE SCREWS) The axis of the head shall be concentric with the axis of the body (measured at one dia- meter length of body under head) within a tolerance equal to 3 per cent (6 per cent
23、TIR) of maximum width across flats. Across corner dimensions shall be measured using gaging rings. For across corner gaging method and equipment see Page Z- 134.01. The radius of the fillet under the bearing surface of the head shall be no greater than 0.15 times the basic major diameter of the thre
24、ad. Taper of sides of hex (angle between one side and the axis of the screw shank) shall not exceed 2 degrees or 0.004 inch whichever is greater, the specified width across flats being the larger dimension. The optional indentation in head shall not impair function of part. Shape is optional with th
25、e manufacturer. Screw heads shall not be eccentric with the screw bodies by more than 3 per cent (6 per cent TIR) of the maximum width across flats. Manufacturers identification shall be a symbol recognized in the trade, and grade identi- fication shall be in accordance with SAE requirements for Gra
26、de 5.1, or 5. For general specifications, dimensioning convention, and tolerances not otherwise defined, refer to current applicable SAE Standard. PAGE AA-140.52 Product Engmeermg AUG 1973 I Standard Parts GENERAL SPECIFICATIONS CONICAL WASHERS TYPE H (HEAVY) (FOR SEMS ONLY) The sizes : I .047 .040
27、.056 L D Crown Height -030 .020 .033 .027 .023 .017 I I I 1 I I WIDE SERIES I B I Outside Diameter 640 765 1.015 I 620 I :743 I .943 t I 1 I I I C I Thickness 040 046 .060 I 033 I 1037 I .052 I D I Crown Height 037 036 .040 I 027 I 026 I .030 5/16 .890 .868 .071 ,059 .041 .031 1.140 1.118 .071 .059
28、.044 .034 Peripheral Teeth - When so specified, washer will be furnished with a minimum of six equally spaced sharp teeth on the outer periphery as shown. 1 (Continued) PAGE AA-141.012 PRIXTED IN U.S.A. AUG 1973 1- Standard Parts GENERAL SPECIFICATIONS (Contd) CONICAL WASHERS (FOR SEMS ONLY) The ins
29、ide diameter “A“ of washers for preassembly on unthreaded screw blanks shall be optional, but shall be such that the washer will be retained on the screw after thread rolling, but shall not bind on the screw shank before and during tightening of the assembly. Washers shall be symmetrical in shape. T
30、he radial section of the washer shall be flat to convex upward with flat preferred. The direction of blanking the outside diameter should permit the sharper edge to be on the underside of the washer. Material and Hardness - Washers shall be made from SAE 1050 to 1065 carbon steel, fabricated and hea
31、t treated to a Rockwell hardness of 40 to 48 C scale or equivalent. For further specification requirements, dimensioning convention, tolerances, twist test, and embrittlement test not otherwise defined, refer to current applicable SAE Standard. 0 Defects: washers shall be free from sharp edges, burr
32、s, cracks,checks, embrittlement, loose scale and all other defects that might affect their serviceability. AUG 1973 Product Engineering PAGE AA-141.013 1- Standard Parts GENERAL SPECIFICATIONS SPRING LOCK WASHERS QUAD-RIB (FOR SEMS ONLY) ENLARGED VIEW SECTION A I Head Style I Nominal Size 1/4 A .lo9
33、 Width F .458 Outside Diameter (Max) .008 .014 .059 ,065 .lo3 H Thickness J Inside Rib Height I-K I Outside Rib Height .007 I .004 I SEE GENERAL SPECIFICATIONS Hexagon I Pa 1 5/16 I 3/8 .550 I .647 I .736 1 ,492 5/16 I .615 .125 .119 .081 .075 .014 .008 .007 .004 .141 .135 .125 -156 .004 .005 .004 .
34、008 .009 .007 .009 .OlO .008 .014 .018 .014 .OS7 .lo4 .091 .063 .114 .097 .117 .146 , .009 .008 I .004 (Continued) AUG 1973 Product Engineering PAGE AA-141.03 Standard Parts GENERAL SPECIFICATIONS SPRING LOCK WASHERS (Continued) REGULAR - HELICAL (FOR SEMS ONLY) ENLARGED VIEW SECTION A F 1 t I c4 i
35、I B B B .L OPTIONAL SEE GENERAL SPECIFICATIONS GENERAL SPECIFICATIONS Washers shall be free from sharp edges, burrs, cracks, checks, embrittlement, loose scale and all other defects that might affect their serviceability. MATERIAL AND HARDNESS - Washers shall be made from SAE 5403 1055 - 1065 carbon
36、 steel fabricated and heat treated to Rockwell C 38 - 46 or equivalent. QUAD-RIB WASHER - There shall be 35 to 45 serrations per inch as counted along the radial center line of the washer face. The length of the serrations must cover 75% of the surface between the ribs. The depth of the serrations s
37、hall be -002 to .006 in. at both sides. The permissible burr at the severed ends shall not increase the overall thickness dimension by more than 10% for washers on the hexagon head screws and 12% for washers on the pan head screws. (No longer manufactured after Nov. 1983) For further requirements, dimensioning convention, tolerances, twist test, and embrittle- ment test not otherwise defined, refer to current applicable SAE standard. PAGE AA-141.04 Product Engineerlng DEC 1991
