MS51964/NASM51964

							FED. SUP CLASS 5305			APPROVED 29 JAN 1964 REVISED (E) 10 SEP 88

TABLE I. DASH NUMBERS AND DIMENSIONS
	NOMINAL SIZE		.060	.86	.112	.138	.164	.190
	THREADS PER INCH		80 UNF-3A	64 UNF-3A	48 UNF-3A	40 UNF-3A	36 UNF-3A	32 UNF-3A
J	SOCKET WIDTH ACROSS FLATS	NOM	.028	.035	.050	.062	.078	.094
C	POINT	MAX MIN	.033 .027	.047 .039	.061 .051	.074 .064	.087 .076	.102 .088
C₁	POINT LENGTH	MAX MIN	.032 .027	.043 .038	.056 .051	.069 .062	.082 .074	.095 .086
C₂	POINT DIAMETER	MAX MIN	.027 .022	.043 .038	.059 .054	.074 .068	.090 .084	.101 .095
S	POINT LENGTH	MAX MIN	.007 .004	.010 .007	.013 .008	.017 .012	.021 .016	.024 .019
L	LENGTH	TOLERANCE	DASH NUMBER
			PLAIN	PLAIN	PLAIN	PLAIN	PLAIN	PLAIN	SELF-LOCKING
	.125 .188 .250 .312 .375 .438 .500 .562 .625	+.010	1 2 3	9* 10* 11*	17 18 19 20 21	27 28 29 30 31	37 38 39 40 41 42* 43	48 49 50 51 52* 53 54	120* 121 122 123 124 125* 126 127* 128
	.750 1.000 1.250	+.020						55 56 57	129 130
* INACTIVE FOR NEW DESIGN AFTER 29 DECEMBER 1972 (E) ENTIRE STANDARD REVISED
P.A ARMY - AR Other Cust AIR FORCE - 99		INTERNATIONAL INTEREST		TITLE SETSCREW - HEXAGON SOCKET, CUP POINT, ALLOY STEEL, CADMIUM PLATED, UNF - 3A, PLAIN AND SELF - LOCKING			MILITARY STANDARD
							MS 51964
PROCUREMENT SPECIFICATION FF-S-200			SUPERSEDES MS51018, MS51020 AND IN PART MS18063, BCTX1, 1.1, 1.2, 3 and 5, BCUX5 and 5.1				PAGE 1 of 3

FED. SUP CLASS
5305

APPROVED 29 JAN 1964 REVISED (E) FOR CHANGES SEE PAGES 1, 2 AND 3.

TABLE I. DASH NUMBERS AND DIMENSIONS - CONTINUED

	NOMINAL SIZE		.250		.3125		.375		.4375	.500
	THREADS PER INCH		.28 UNF - 3A		.24 UNF - 3A		.24 UNF - 3A		.20 UNF - 3A	.20 UNF - 3A
J	SOCKET WIDTH ACROSS FLATS	NOM	.125		.156		.188		.219	.250
Φ C	POINT	MAX MIN	.132 118		.172 156		.212 194		.252 232	.291 270
ΦC₁	POINT	MAX MIN	.125 114		.156 144		.187 174		.218 204	.230 235
ΦC₂	POINT	MAX MIN	.156 150		.190 185		.241 236		.286 281	.333 328
S	POINT LENGTH	MAX MIN	.027 .022		.038 .033		.041 .036		.047 .042	.054 .049
L	LENGTH	TOLERANCE	DASH NO
			PLAIN	SELF-LOCKING	PLAIN	SELF-LOCKING	PLAIN	SELF-LOCKING	PLAIN	PLAIN	SELF-LOCKING
	.188 .250 .312 .375 .438 .500 .562 .625	+.010	63 64 65 66 67* 68 69	131 132 133 134 135* 136 137* 138	78 79 80 81* 82* 83	144 145 146 147 148	92 93 94 95* 96 97	156 157 158	118* 119* 120*	107 108	666 167 168
	.750 .875 1.000 1.250 1.500 1.750 2.000	+.020	70 71 72	139 140 141 142 143	84 85 86	149 150 151 152 153 154 155	98 99 100 101	159 160 161 162 163 164 165		109 110 111* 112*	169 170 171 172 173 174 175
	2.500 3.000	+.031									176 177
* INACTIVE FOR NEW DESIGN AFTER 29 DECEMBER, 1972

TABLE I. DASH NUMBERS AND DIMENSIONS - CONTINUED

	NOMINAL SIZE		.625	.750	.875	.1.000
	THREADS PER INCH		.18 UNF - 3A	.16 UNF - 3A	.14 UNF - 3A	.14 UNF - 3A
J	SOCKET WIDTH ACROSS FLATS	NOM	.312	.375	.500	.562
Φ C	POINT	MAX MIN	.371 .347	.450 .425	.530 502	.609 579
ΦC₁	POINT	MAX MIN	.312 .294	.375 .357	.437 .418	.500 480
ΦC₂	POINT	MAX MIN	.425 420	.523 518	---	---
S	POINT LENGTH	MAX MIN	.067 062	.081 076	---	---
L	LENGTH	TOLERANCE	DASH NO
L	LENGTH	TOLERANCE	PLAIN	PLAIN	PLAIN	PLAIN
	.250 .312 .375 .438 .500 .625	+.010	253 254	268 269
	.750 .875 1.000 1.250 1.500 1.750 2.000	+.020	255 256 257 258 259 260 261	270 271 272 273 274 275 276	283 284 285 286 287 288 289	295 296 297 298 299 300 301
	2.500 3.000	+.031	262 263	277 278	290 291	302 303
INACTIVE FOR NEW DESIGN AFTER 30 JUNE, 1988

P.A
ARMY - AR
Other Cust
AIR FORCE - 99

INTERNATIONAL
INTEREST

TITLE
SETSCREW - HEXAGON SOCKET, CUP POINT,
ALLOY STEEL, CADMIUM PLATED, UNF - 3A,
PLAIN AND SELF - LOCKING

MILITARY STANDARD

MS 51964

PROCUREMENT SPECIFICATION
FF-S-200

SUPERSEDES MS51018, MS51020 AND IN PART MS18063, BCTX1, 1.1, 1.2, 3 and 5, BCUX5 and 5.1

PAGE 2 of 3

FED. SUP CLASS
5305

APPROVED 29 JAN 1964 REVISED (E) FOR CHANGES SEE PAGES 1, 2 AND 3.

REQUIRMENTS:

MATERIAL :

ALLOY STEEL IN ACCORDANCE WITH PROCUREMENT SPECIFICATION.

PROACTIVE COATING AND SURFACE TREATEMENT:

CADMIUM PLATED IN ACCORDANCE WITH PROCUREMENT SPECIFICATION.

THREADS:

THE THREADS SHALLL BE IN ACCORDANCE WITH FED-STD-H28/2. ACCEPTABILITY OF SCREW THREADS FOR SIZES .190 AND SMALLER SHALL BE IN ACCORDANCE WITH FED-STD-H28/20, SYSTEM 21. ACCEPTABILITY IF SCREW THREADS FOR SIZES .250 AND LARGER SHALL BE IN ACCORDANCE WITH FED-STD-H28/2,SYSTEM 22. SLEF LOACKING SCREWS SHALL BE INSPECTED PRIOR TO INSTALLATION OF LOACKING ELEMENT.

SELF-LOCKING ELEMENT:

The self-lockingh element shall be in accordance with procurement document.
Maximum ring gage diameter that loacking region of serscrew must pass thru freely or with finger pressure shall be the nominal size pluse 0.010.
MIL-F-18240 doesn't establis torque requirement for lengths above the dashed line. Only a positive indication of torque is required.

TOLERANCES:

ANGLES +5&DEG;, UNLESS OTHERWISE SPECIFIED.

PART NUMBER:

THE PART NUMBER SHALL CONSIST OF THE BASIC MS NUMBER FOLLOWED BY A DASH NUMBER TAKEN FROM TABLE I.
EXAMPLE:

MS51964_1 INDICATES- SETSCREW, HEXAGON SOCKET, CUP POINT, ALLOY STEEL, CADMIUM PLATED; 060-80 UNF-3A; LENGTH .125; PLAIN.

NOTES:

ALL DIMENSTIONS ARE IN INCHES.

IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS STANDARD AND THE REFERENCES CITED HEREIN. THE TEXT OF THIS STANDARD SHAL TAKE PRECEDENCE

REFERENCED GOVERNMENT (OR NON-GOVERNMENT) DOCUMENTS OF THE ISSUE LIMITED IN THAT ISSUE OF THE DEPARTMENT OF DEFENSE INDEX OF SPECIFICATION AND STANDARDS (DOG1SS) SPECIFIED IN THE SPECIFICATION FROM A PART OF THIS STANDARD TO THE EXTENT SPECIFIED HEREIN.

INTERCHANGEABILITY RELATINSHIP
Screws covered by the dash numbers given in MS51018 and MS51020 are cancelled after 29 January 1964 and superseding by the screws covered on MS51964 having the same dash numbers. Cancelled Screw may be used until existing stocks are depleted. Use only MS51964 screws for new design.

Screws covered by the dash numbers given in MS18063 in part are cancelled.
Cancelled Screw may be used until existing stocks are depleted. Use only superseding screws for new design. Replacement shall be in accordance with Table II.

TABLE II. INTERCHANGEABILITY

CANCELLED	SUSPERSENDING	CANCELLED	SUSPERSENDING	CANCELLED	SUSPERSENDING	CANCELLED	SUSPERSENDING
MS18063	MS51964	MS18063	MS51964	MS18063	MS51964	MS18063	MS51964
DASH NUMBER		DASH NUMBER		DASH NUMBER		DASH NUMBER
4 8 13 19 25 31 36 44 49 56 68 9 14 20 26	120 121 122 123 124 125 126 127 128 129 130 131 132 133 134	32 17 45 50 57 63 69 73 77 15 22 27 38 51 58	135 136 137 138 139 140 141 142 143 144 145 146 147 148 149	64 70 74 78 81 84 91 39 52 59 65 71 75 79	150 151 152 153 154 155 156 157 158 159 160 161 162 163	82 85 92 40 53 60 66 72 76 80 83 86 87 88	164 165 166 167 168 169 170 171 172 173 174 175 176 177

P.A
ARMY - AR
Other Cust
AIR FORCE - 99

INTERNATIONAL
INTEREST

TITLE
SETSCREW - HEXAGON SOCKET, CUP POINT,
ALLOY STEEL, CADMIUM PLATED, UNF - 3A,
PLAIN AND SELF - LOCKING

MILITARY STANDARD

MS 51964

PROCUREMENT SPECIFICATION
FF-S-200

SUPERSEDES MS51018, MS51020 AND IN PART MS18063, BCTX1, 1.1, 1.2, 3 and 5, BCUX5 and 5.1

PAGE 3 of 3

All prints are for reference purpose only. CAM-TECH manufactures to the latest revision.

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Military/Aerospace Socket Set Screw - Hex Cup Point - Alloy, Cad Plated

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