MS51965/NASM51965


FED. SUP CLASS
5305

APPROVED 29 JAN 1964     REVISED (A) 10 SEP 1969 (B) 29 DEC 1972

NOMINAL SIZE .086 .112 .138 .164 .190 .250 .3125 .375 .500
THREADS PER INCH (UNC_3A) 56 40 32 32 24 20 18 16 13
J SOCKET WIDTH
ACROSS FLATS
NOW .035 .050 .062 .078 .094 .125 .156 .188 .250
C POINT DIAMETER MAX
MIN
.047
.039
.061
.051
.074
.064
.087
.076
.102
.088
.132
.118
.172
.156
.212
.194
.291
.270
L LENGTH TOL DASH NUMBER
PLAIN PLAIN SELF-LOCKING PLAIN SELF-LOCKING PLAIN SELF-LOCKING PLAIN PLAIN PLAIN PLAIN PLAIN
.125
.188
.250
.312
.375

.438
.500
.562
.625
+.010 1
2
8
9
10
11
101
102
103
104
105

106*
107
108*
109
17
18
19
20
21
111
112
113
114
115

116*
117
118*
119
27
28
29
30
31


32

33
131
132
133
134
135

136*
137
138*
139

39
40
41
42

43

44

51
52
53
54

55

56


64
65
66

67

68


76
77
78

79

80




88

89

90
.750
.875
1.000
+.020 120
121
140
141
142
45 57

58
69

70
81

82
91

92
(B)
  • Inactive for new design after 29 DEC 1972 .
    NOTES:
  1. MATERIAL : Alloy steel in accordance with procurement specification, having a rockwell hardness of C45-53
  2. PROACTIVE COATING: Cadmium plated in accordance with procurement specification.
  3. THREADS:The threads shall be in accordance with MIL-S-7742.
  4. DIMENTIONS:All dimensions are in inches, unless otherwise specified.
  5. PART NUMBER: The part number consists of the ms number, plus the dash number.
    EXAMPLE: MS51965_1
  6. SELF-LOCKING ELEMENT:
    1. The self-lockingh element shall be in accordance with MIL-F-18240.

    2. For design and usage limitations, see MS15981.
    3. Location of effective loacking area shall be in accordance with MS15981.
    4. 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.
    5. MIL-F-18240 doesn't establis torque requirement for lengths above the dashed line. Only a positive indication of torque is required.
  7. Referenced documents shall be of the issue in effect on date of invitations for bid.
  8. For design feature purposes, this standard takes precedence over procurement documents referenced herein.
(B) For changes see sheets 1 and 2.
P.A WC
Order Cust
AS
82
TITLE
SETSCREW - HEXAGON SOCKET, FLAT POINT,
ALLOY STEEL, CADMIUM PLATED, UNC - 3A
PLAIN AND SELF - LOCKING          (B)
MILITARY STANDARD
MS 51965
PROCUREMENT SPECIFICATION
FF-S-200
SUPERSEDES MS51025, MS51027 and in part MS51053, MS18065, BCTX2.6, BCTX2.7, BCTX2.13, BCTX2.15, BCU4.5 SHEET       1       of       2
FED. SUP CLASS
5305

APPROVED 29 JAN 1964     REVISED (A) 10 SEP 1969 (B) FOR CHANGES SEE SHHET 1 AND 2.





INTERCHANGEABILITY

Screws covered by the dash numbers given in MS51025 and MS 51027 are cancelled after 29 January 1964 and superseded by screws covered on MS51965 having same dash number. Cancelled screws may be used until existing stock are depleted. Use only the MS51965 screws for new design.

Screws covered by the dash numbers given in MS51053 in part are cancelled/ inactivated after 10 September 1969. Cancelled screws may be used until existing stock are depleted. Use only the superseded screws for new design. Replacement shall be in accordance with Table II.
TABLE II
CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING
MS51053 MS51965 MS51053 MS51965 MS51053 MS51965 MS51053 MS51965
DASH NUMBER DASH NUMBER DASH NUMBER DASH NUMBER
201
202
203
204
205
211
212
**
1
2
**
**
**
8
213
214
215
216
217
218
219
9
10
11
**
**
**
**
220
226
227
228
229
230
**
17
18
19
20
21
231
232
233
234
235
236
**
**
**
**
**
**
** No Replacement




Screws covered by the dash numbers given in MS18065 in part are cancelled.
Cancelled screws may be used until existing stock are depleted, Use only the superseding screws for new design. Replacement shall be in accordance with Table III.
(B)
TABLE III
CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING
MS18065 MS51965 MS18065 MS51965 MS18065 MS51965 MS18065 MS51965
DASH NUMBER DASH NUMBER DASH NUMBER DASH NUMBER
1
5
10
16
22
89
33
41
101
102
103
104
105
106
107
108
46
2
6
11
17
23
90
34
109
111
112
113
114
115
116
117
42
47
54
61
3
7
12
18
118
119
120
121
131
132
133
134
24
30
35
43
48
55
62
67
135
136
137
138
139
140
141
142
P.A WC
Order Cust
AS
82
TITLE
SETSCREW - HEXAGON SOCKET, FLAT POINT,
ALLOY STEEL, CADMIUM PLATED, UNC - 3A
PLAIN AND SELF - LOCKING          (B)
MILITARY STANDARD
MS 51965
PROCUREMENT SPECIFICATION
FF-S-200
SUPERSEDES MS51025, MS51027 and in part MS51053, MS18065, BCTX2.6, BCTX2.7, BCTX2.13, BCTX2.15, BCU4.5 SHEET       2       of       2

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