1、 AMSC N/A FSC 5305 MS51960D 20 April 2011 SUPERSEDING MS51960C 29 March 1991 DETAIL SPECIFICATION SHEET SCREW, MACHINE FLAT COUNTERSUNK HEAD, 82 DEGREE, CROSS-RECESSED, CORROSION RESISTANT STEEL, UNF-2A This specification sheet is approved for use by all Departments and Agencies of the Department of
2、 Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and FF-S-92. L H11RR8082MAY BE FLATOR ROUNDEDDAHFIGURE 1. Screw. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51960D 2 TAB
3、LE I. Dash numbers and dimensions NOMINAL SIZE .060 .086 .112 .138 .164 .190 .250 .3125 .375 .4375 .500 .5625 .625 .750 THREADS PER INCH UNF-2A 80 64 48 40 36 32 28 24 24 20 20 18 18 16 D BODY MAX .0600 .0860 .1120 .1380 .1640 .1900 .2500 .3125 .3750 .4375 .5000 .5625 .6250 .7500 DIAMETER MIN .0496
4、.0733 .0954 .1184 .1424 .1658 .2225 .2806 .3430 .3995 .4619 .5205 .5828 .7029 A MAX SHARP .119 .172 .225 .279 .332 .385 .507 .635 .762 .812 .875 1.000 1.125 1.375 HEAD MIN SHARP .105 .156 .207 .257 .308 .359 .477 .600 .722 .767 .831 .950 1.069 1.306 DIAMETER ABS MIN .099 .147 .195 .244 .292 .340 .45
5、2 .568 .685 .723 .775 .889 1.002 1.230 H HEAD HEIGHT - REF .035 .051 .067 .083 .100 .116 .153 .191 .230 .223 .223 .260 .298 .372 FULL HEAD H1HEAD HEIGHT MAX .025 .036 .047 .059 .070 .081 .107 .134 .161 .156 .156 .182 .208 .260 UNDERCUT HEAD MIN .018 .028 .038 .048 .058 .068 .092 .116 .140 .133 .130
6、.153 .176 .223 R RADIUS - MAX .024 .034 .045 .055 .066 .076 .100 .125 .150 .175 .200 .225 .250 .300 FULL HEAD R1RADIUS - MAX .009 .013 .017 .021 .025 .028 .038 .047 .056 .066 .075 .084 .094 .112 UNDERCUT HEAD DRIVER SIZE 0 1 1 2 2 2 3 4 4 4 4 4 5 5 TENSILE STRENGTH * LOAD LBS-MIN 140 310 530 810 118
7、0 1600 2910 4640 7020 9500 12800 16200 20500 29800 L LENGTH TOL. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. DASH NO. .12 1 6 15 26 41 .19 2 7 16 27 42 60 .25 3 8 17 28 43 61 78 .31 4 9 18 29 44 62 79 .38 +.00 5 10 19 30 45 63
8、80 95 .44 - .03 11 20 31 46 64 81 96 .50 12 21 32 47 65 82 97 110 .62 13 22 33 48 66 83 98 111 123* .75 14 23 34 49 67 84 99 112 124* 135* .88 24 35 50 68 85 100 113 125* 136* 146* 156* 1.00 25 36 51 69 86 101 114 126* 137* 147* 157* 166* 1.25 37 52 70 87 102 115 127* 138* 148* 158* 167* 1.50 38 53
9、71 88 103 116 128* 139* 149* 159* 168* 1.75 +.00 39 54 72 89 104 117 129* 140* 150* 160* 169* 2.00 - .06 40 55 73 90 105 118 130* 141* 151* 161* 170* 2.25 56* 74 91 106 119 131* 142* 152* 162* 171* 2.50 +.00 57* 75 92 107 120 132* 143* 153* 163* 172* 2.75 - .09 58* 76* 93* 108* 121 133* 144* 154* 16
10、4* 173* 3.00 59* 77* 94* 109* 122 134* 145* 155* 165* 174* * Inactive for new design after 20 August 1974. * Based on 80,000 PSI minimum tensile strength, load pounds are calculated by the stress areas in accordance with FED-STD-H28/2. Provided by IHSNot for ResaleNo reproduction or networking permi
11、tted without license from IHS-,-,-MS51960D 3 Requirements: 1. Material. Corrosion resistant steel, 300 series as specified in SAE AMS-QQ-S-763. Type 304 or 316 or equal to or interchangeable with 16:18 or 18:8 chromium-nickel alloy steel. 2. Surface treatment. Passivated in accordance with procureme
12、nt specification. 3. Protective coating. Black oxide coating in accordance with procurement specification. (When black oxide coating is required, the dash number shall be followed by a code letter “B”). 4. Magnetic permeability. The screw shall meet the magnetic permeability requirements of the proc
13、urement specification. 5. Threads. Threads shall be in accordance with FED-STD-H28/2. Acceptability of screw threads shall be in accordance with FED-STD-H28/20, System 21. 6. Thread length. Full form threads shall extend to within 2 threads or less of head bearing surface for lengths thru 2.00 inche
14、s. Longer lengths shall have a minimum full form thread length of 1.50 inches. 7. Recess. The recess shall be in accordance with NASM9006. 8. Self-locking element. The self-locking element shall be in accordance with MIL-DTL-18240. (When a self-locking element is required, the dash number shall be f
15、ollowed by a code letter “L”. If black oxide coating is also required, the dash number would first be proceeded with a “B” followed by a “L”). 9. Part number. The part number shall consist of the basic MS number, followed by a dash number from Table I. A code letter ”B” for black oxide then a code l
16、etter “L” for self-locking will follow the dash number, if applicable. If black oxide is not required, and self-locking is required, an “L” will follow the dash number. Example: MS51960 65 B L Self-locking element Black oxide coating Dash number Basic MS number MS51960-65BL - Screw, machine-flat cou
17、ntersunk head, 82, cross-recessed-corrosion resistant steel, UNF-2A; .190-32UNF-2A nominal thread size; .50 length; black oxide coated with self-locking element. Notes: 1. All dimensions in inches. 2. Sizes above dotted line have undercut heads. 3. MS51960 supersedes MS35201, MS35250 and in part: MS
18、35358, MS35363 and AN510. 4. In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence. 5. Changes from previous issue: Marginal notations are not used in this revision to identify changes with respect to the previou
19、s issue due to the extent of the changes. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51960D 4 Table II. AN510 Interchangeability. The screws covered by the following dash numbers given in AN510 in part are canceled after the date indicated on
20、the document. The canceled screws cannot always replace the new screws and should be used until existing stocks are depleted. Use only the new screws for new design and engineering. Replacement shall be in accordance with this table and as follows: AN510 dash numbers having an “R” in place of the “-
21、“ are superseded byMS51960 dash numbers as those having the “-“. Part Number Part Number Part Number Part Number Part Number Canceled New Canceled New Canceled New Canceled New Canceled New AN510 MS51960 AN510 MS51960 AN510 MS51960 AN510 MS51960 AN510 MS51960 C0-2 C0-3 C0-4 C0-5 C0-6 C0-7 C0-8 C1-2
22、THRU C1-8 C2-3 C2-4 C2-5 C2-6 C2-7 C2-8 C2-9 C2-10 C2-11 C2-12 C3-3 THRU C3-12 C4-3 C4-4 C4-5 C4-6 C4-7 C4-8 C4-9 C4-10 1 2 3 4 5 * * * * * 7 8 9 10 11 12 * 13 * 14 * * * 16 17 18 19 20 21 * 22 C4-11 C4-12 C4-13 C4-14 C4-15 C4-16 C4-18 THRU C4-28 C5-4 THRU C5-28 C6-4 C6-5 C6-6 C6-7 C6-8 C6-9 C6-10 C
23、6-11 C6-12 C6-13 C6-14 C6-15 C6-16 C6-18 C6-20 C6-22 C6-24 C6-26 C6-28 * 23 * 24 * 25 * * * * * * 28 29 30 31 32 * 33 * 34 * 35 * 36 * 37 * 38 * 39 C6-30 C6-32 C6-34 C6-36 C6-38 C6-40 C8-4 C8-5 C8-6 C8-7 C8-8 C8-9 C8-10 C8-11 C8-12 C8-13 C8-14 C8-15 C8-16 C8-18 C8-20 C8-22 C8-24 C8-26 C8-28 C8-30 C8
24、-32 C8-34 C8-36 C8-38 C8-40 * 40 * * * * 43 44 45 46 47 * 48 * 49 * 50 * 51 * 52 * 53 * 54 * 55 * 56 * 57 C8-42 C8-44 C8-46 C8-48 C10-4 C10-5 C10-6 C10-7 C10-8 C10-9 C10-10 C10-11 C10-12 C10-13 C10-14 C10-15 C10-16 C10-18 C10-20 C10-22 C10-24 C10-26 C10-28 C10-30 C10-32 C10-34 C10-36 C10-38 C10-40 C
25、10-42 * 58 * 59 61 62 63 64 65 * 66 * 67 * 68 * 69 * 70 * 71 * 72 * 73 * 74 * 75 * C10-44 C10-46 C10-48 C416-6 C416-7 C416-8 C416-9 C416-10 C416-11 C416-12 C416-13 C416-14 C416-15 C416-16 C416-18 C416-20 C416-22 C416-24 C416-26 C416-28 C416-30 C416-32 C416-34 C416-36 C416-38 C416-40 C416-42 C416-44
26、C416-46 C416-48 76 * 77 80 81 82 * 83 * 84 * 85 * 86 * 87 * 88 * 89 * 90 * 91 * 92 * 93 * 94 * No replacement Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51960D 5 TABLE III. MS35201 and MS35250 Interchangeability. The screws covered by the foll
27、owing dash numbers given in MS35201 and MS35250 are canceled after 19 December 1963. The canceled screws cannot always replace the new screws and should be used until existing stocks are depleted. Use only the new screws for new design and engineering. Replacement shall be in accordance with this ta
28、ble. Part Number Part Number Part Number Part Number Canceled New Canceled New Canceled New Canceled New MS35201 MS35250 MS51960 MS35201 MS35250 MS51960 MS35201 MS35250 MS51960 MS35250 MS51960 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 1 2 3 4
29、5 6 THRU 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 1 2 3 4 5 * * * 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
30、57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
31、82 83 84 85 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 86 87 88 89 90
32、 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
33、175 176 177 178 179 180 181 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 * No replacement Provided by IHSNot for ResaleNo reproduction or networking permitted withou
34、t license from IHS-,-,-MS51960D 6 Custodians: Preparing activity: Army - AV DLA - IS Navy - SH Air Force - 99 (Project 5305-2011-007) Review activities: Army AT,EA,MI Navy MC, OS NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
