MS51053


FED. SUP CLASS
5305

APPROVED 7 MAY 58         REVISED

MS21342 Fluted, Alloy, Cad Plated, Socket Set Screw
D NOMINAL SIZE #2 (.086) #4 (.112) #6 (.138)
B THREADS PER INCH 56NC-3A 40NC-3A 32NC-3A
C CUP AND FLAT
POINT DIAMETER
{ MAX
MIN
.047
.039
.061
.051
.074
.064
R OVAL POINT RADIUS .0625 .084 .1094
Y CONE
POINT
ANGLE
118°+ 2° FOR LENGTHS UNDER
90°+ 2° FOR THESE LENGTHS AND OVER
3/32
7/64
1/8
5/32
1/8
3/16
P HALF
DOG
DIAMETER{ MAX
MIN
.057
.052
.075
.070
.092
.087
Q POINT LENGTH .022 .026 .035
J SOCKET DIAMETER MINOR { MAX
MIN
.038
.0375
.051
.050
.056
.055
M SOCKET DIAMETER MAJOR { MAX
MIN
.050
.049
.062
.061
.079
.070
N SOCKET LAND AND WIDTH { MAX
MIN
.017
.016
.014
.013
.023
.022
NUMBER OF FLUTES 4 6 4
T KEY ENGAGEMENT MIN .028 .040 .050
  • Indicates manufacturer's non stock production items.
KEY ENGAGEMENT : THESE DIMENTIONS APPLY TO SCREWS ONE DIAMETER IN LENGTH OR LONGER, FOR SCREWS SHORTER THAN ONE DIAMETER IN LENGTH, SOCKET TO BE AS DEEP AS PRACTICABLE.
MATERIAL :STEEL, HIGH-GRADE ALLOY, IN ACCORDANCE WITH PROCUREMENT SPECIFICATION.
HARDNESS: SETSCREWS SHALL BE HARDENED BY HEAT TREATMENT TO A HARDNESS OF ROCKWELL C45 TO 53.
PROTECTIVE COATING: CADMIUM PLATED, IN ACCORDANCE WITH SPECIFICATION QQ-P-416, TYPE II, CLASS 3.
THREADS: THE THREADS SHALL BE IN ACCORDANCE WITH SCREW-THREAD STANDARD FOR FEDRAL SERVICES HANDBOOK H-28.
DIMENTIONS: ALL DIMENSTIONS ARE IN INCHES, UNLESS OTHERWISE SECIFIED.
PART NUMBER: The MS PART NUMBER CONSISTS OF MS NUMBER, PLUS DASH NUMBER. EXAMPLE: MS51053-1.
NOTES:
  1.   REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR BID.
  2.   THIS STANDARD TAKES PRECEDENCE OVER DOCUMENTS REFERENCED HEREIN.

(A) CANCELLED/ INACTIVE AS OF 10 SEPT. 1969
SUPERSEDED IN PART BY MS51963, MS 51965, MS51973, MS51977 AND MS51981 - SEE SHEET 2.



THIS DOCUMENT HAS BEEN PROMULGATED BY THE DEPARTMENT OF DEFENCE AS THE MILITARY STANDARD TO LIMIT THE SELECTION OF THE ITEM, PRODUCT, OR DESIGN COVERED HEREIN IN ENGINERRING, DESIGN, AND PROCUREMENT. THIS STANDARD SHALL BECOME EFFECTIVE NOT LATER THAN 90 DAYS AFTER THE LATEST DATE OF APPROVAL SHOWN.
Costom
A - ORD
N - SHIPS
AF - USAF
OTHER INT
A - CES10T
N - ANCOR
AF -
MILITARY STANDARD MS51053
SETSCREW - FLUTED SOCKET.
ALLOY STEEL, CADMIUM PLATED, NC - 3A
PROCUREMENT SPECIFICATION
FF-S-200
SUPERSEDES: SHEET       1       of       2
FED. SUP CLASS
5305

APPROVED 7 MAY 1958       REVISED

CUP POINT FLAT POINT
#2 56NC-3A #4 40NC-3A #6 32NC-3A #2 56NC-3A #4 40NC-3A #6 32NC-3A
LENGTH TOLERANCE DASH NO. FIIN DASH NO. FINN DASH NO. FINN DASH NO. FIIN DASH NO. FINN DASH NO. FINN
1/16
1/8
3/16
1/4

5/16
3/8
7/16
1/2

9/16
5/8
3/4
7/8
+1-1/2%
OF LENGTH
WITH MINIMUM OF
+.010 IN.
101
102
103
104

105*
111*
112
113
114

115
116
117
118

119*
120

126
127
128

129
130
131
132

133*
134
135
136
201*
202*
203*
204*

205
211*
212
213
214

215
216
217*
218

219
220

226
227
228

229
230
231
232

233*
234
235
236
CONE POINT OVAL POINT
#2 56NC-3A #4 40NC-3A #6 32NC-3A #2 56NC-3A #4 40NC-3A #6 32NC-3A
LENGTH TOLERANCE DASH NO. FIIN DASH NO. FINN DASH NO. FINN DASH NO. FIIN DASH NO. FINN DASH NO. FINN
1/16
1/8
3/16
1/4

5/16
3/8
7/16
1/2

9/16
5/8
3/4
7/8
+1-1/2%
OF LENGTH
WITH MINIMUM OF
+.010 IN.
301*
302*
303*
304*

305*
311*
312
313
314

315
316
317
318

319*
320

326
327
328

329
330
331
332

333*
334
335
336
401*
402*
403*
404*

405*
411*
412
413
414

415
416
417*
418

419
420

426
427
428

429
430
431*
432

433*
434
435*
436*
HALF-DOG POINT
#2 56NC-3A #4 40NC-3A #6 32NC-3A #2 56NC-3A #4 40NC-3A #6 32NC-3A
LENGTH TOLERANCE DASH NO. FIIN DASH NO. FINN DASH NO. FINN DASH NO. FIIN DASH NO. FINN DASH NO. FINN
1/16
1/8
3/16
1/4

5/16
3/8
7/16
1/2

9/16
5/8
3/4
7/8
+1-1/2%
OF LENGTH
WITH MINIMUM OF
+.010 IN.
501*
502*
503*
504*

505*
511*
512*
513
514

515
516
517*
518

519*
520

526*
527
528

529
530
531*
532

533*
534
535*
536*
NOTES: FOR MATERIAL, PROTECTIVE COATING AND OTHER PERTIMENT DATA, SEE SHEET 1





Costom
A - ORD
N - SHIPS
AF - USAF
OTHER INT
A - CES10T
N - ANCOR
AF -
MILITARY STANDARD MS51053
SETSCREW - FLUTED SOCKET.
ALLOY STEEL, CADMIUM PLATED, NC - 3A
PROCUREMENT SPECIFICATION
FF-S-200
SUPERSEDES: SHEET       2       of       2

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