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FED. SUP CLASS
5305   

MS21342 Fluted, Alloy, Cad Plated, Socket Set Screw    

 

D

B

C

M

N

P

NUMBER
OF
FLUTS

 (a)                T

NOMINAL
DIA

THREADS
PER INCH

CUP AND FLAT
POINT DIA

SOCKET DIA
MAJOR

SOCKET DIA
MINOR


SOCKET LAND AND WIDTH


KEY ENGAGEMENT
MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

MIN

.086

 56UNC - 3A .047 .039 .050 .049 .041 .040 .011 .010 6 .040
.112 40UNC - 3A .061 .051 .062 .061 .051 .050 .014 .013 .045
.138 32UNC - 3A .074 .064 .074 .073 .064 .063 .016 .015 .055
LENGTH CUP POINT FLAT POINT
L + .010 DASH NO. DASH NO.
  .086-56UNC .112-40UNC .138-32UNC .086-56UNC .112-40UNC .138-32UNC
1/16 101 111   201 211  
3/32 102 112   202 212  
1/8 103 113 126 203 213 226
3/16 104 114 127 204 214 227
1/4 105 115 128 205 215 228
5/16 106 116 129 206 216 229
3/8   117 130   217 230
7/16   118 131   218 231
1/2   119 132   219 232

(a) KEY ENGAGEMENT: THESE DIMENSIONS 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 ROCKWELL C45 TO 53.
PROTECTIVE COATING:  CADMIUM PLATED, IN ACCORDANCE WITH SPECIFICATION QQ-P-416, TYPE 11, CLASS 3.
THREADS: THE THREADS SHALL BE IN ACCORDANCE WITH SCREW-THREAD STANDARDS FOR FEDERAL SERVICES HANDBOOK H-28.
DIMENSIONS: DIMENSIONS IN INCHES UNLESS OTHERWISE SPECIFIED.
PART NUMBER: THE MS PART NUMBER CONSISTS OF THE MS NUMBER, PLUS THE DASH NUMBER.

CANCELLED AS OF 17 May 1985.
FOR DESIGN FEATURE PURPOSES, THIS STANDARD TAKES PRECEDENCE OVER PROCUREMENT DOCUMENTS REFERENCED HEREIN.
REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATION FOR BID. 
P.A.                AIR FORCE-11

TITLE

SETSCREW, FLUTED SOCKET,
ALLOY STEEL, CADMIUM PLATED UNC-3A

 MILITARY STANDARD
MS21342(USAF)
PROCUREMENT SPECIFICATION
FF-S-200 & MIL-F-18240

SUPERSEDES:

 SHEET  1  OF  2
APPROVED  1 JULY 71               REVISED A  17 MAY 85

 

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