MS51977/NASM51977


FED. SUP CLASS
5305

APPROVED 6 MAR 1964       REVISED (A)N 1970 (C) 31 MAR 1972

NOMINAL SIZE .086 .112 .138 .164 .190 .250 .3125 .375 .500 .625
THREADS PER INCH (UNC_3A) 56 40 32 32 24 20 18 16 13 11
J SOCKET WIDTH
ACROSS FLATS
NOM .035 .050 .062 .078 .094 .125 .156 .188 .250 .312
P POINT DIAMETER MAX
MIN
.057
.053
.075
.070
.092
.087
.109
.103
.127
.120
.156
.149
.203
.195
.250
.241
.344
.334
.469
.456
Q POINT LENGTH MAX
MIN
.024
.020
.030
.026
.038
.032
.043
.037
.049
.041
.067
.059
.082
.074
.099
.089
.130
.120
.164
.148
L LENGTH TOL. DASH NUMBER
.125
.188
.250
.312

.375
.500
.625
+.010 1
2
3
9
10
11
12
18
19
20
21

22
23

29
30
31

32
33

39
40
41

42
43


49
50

51
52
53


61
62

63
64
65





73
74
75






84
85






94
95
.750
1.000
1.250
+.020 54
55
66
67
76
77
78
86
87
88
96
97
98
      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 SHALLL BE IN ACCORDANCE WITH MIL-S-7742.
    4. DIMENTIONS:ALL DIMENTIONS ARE IN INCHES, UNLESS OTHERWISE SPECIFIED.
    5. PART NUMBER: THE PART NUMBER CONSISTS OF THE MS NUMBER, PLUS THE DASH NUMBER.
      EXAMPLE: MS51977_1.
    6. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATIONS FOR BID.
    7. FOR DESIGN FEATURE PURPOSES, THIS STANDARD TAKES PRECEDENCE OVER PROCUREMENT DOCUMENTS REFERENCED HEREIN.
    INTERCHANGEABILITY

    Screws covered by the dash numbers given in MS51041 and MS 51043 are cancelled after 6 March 1964 and superseded by screws covered on MS51977 having same dash number. Cancelled screws may be used until existing stock are depleted. Use only the MS51977 screws for new design.


    (C)


    Screws covered by the dash numbers given in MS51053 are cancelled/ inactivated after 10 September 1969. 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 II.
TABLE II
CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING CANCELLED SUSPERSENDING
MS51053 MS51977 MS51053 MS51977 MS51053 MS51977 MS51053 MS51977
DASH NUMBER DASH NUMBER DASH NUMBER DASH NUMBER
501
502
503
504
505
511
512
**
1
2
3
**
**
9
513
514
515
516
517
518
519
10
11
12
**
**
**
**
520
526
527
528
529
530
**
18
19
20
21
22
531
532
533
534
535
536
**
23
**
**
**
**
** No Replacement
P.A WC
Order Cust
AS
82
TITLE
SETSCREW - HEXAGON SOCKET, HALF - DOG POINT,
ALLOY STEEL, CADMIUM PLATED, UNC - 3A
MILITARY STANDARD
MS 51977
PROCUREMENT SPECIFICATION
FF-S-200
SUPERSEDES MS51041, MS51043 and in part MS51053, BCTX2.2, BCTX2.3, BCTX2.8, BCTX2.9, BCTX2.11 and BCTX2.14. SHEET       1       of       1

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