MS18068


MS18067 per NASM18067 Cone Point, Alloy, Cad Plated, Socket Set Screw

THREAD

D
DIA
MAX

F

H
DIA

SELF-LOCKING
DESIGN DATA

T
HEX
DEPTH

P(d)

MAX

MIN

MAX

MIN

50o MAX

MIN

#4-40NC-3A .112 .0510 .0500 .061 .051 .062 .040
#6-32NC-3A .138 .0635 .0625 .074 .064 .076 .050
#8-32NC-3A .164 .0791 .0781 .087 .076 .085 .062
#10-32NF-3A .190 .0947 .0937 .102 .088 .093 .075
1/4-28UNF-3A .250 .1270 .1250 .132 .118 . 116 .100
5/16-24UNF-3A .3125 .1582 .1562 .172 .156 .136 .125
3/8-24UNF-3A .375 .1895 .1875 .212 .194 .151 .150
1/2-20UNF-3A .500 .2520 .2500 .291 .270 .188 .200
L
LENGTH

TOLERANCE

DASH NUMBERS (a)

#4-40 #6-32 #8-32 #10-32 1/4-28 5/16-24 3/8-24 1/2-20

1/8

+.010

1 2 3 4            
3/16 5 6 7 8 9         
1/4 10 11 12 13 14 15      
5/16 16 17 18 19 20 21      
3/8 22 23 24 25 26 27 91 92
7/16 89 90 30 31 32         
1/2 33 34 35 36 37 38 39 40
9/16 41 42 43 44 45               
5/8 46 47 48 49 50 51 52 53
3/4 +.015    54 55 56 57 58 59 60
7/8    61 62

 

63 64 65 66
1      67 68 69 70 71 72
1-1/4             73 74 75 76
1-1/2 +.020             77 78 79 80
1-3/4

   For lengths above heavy line see note (g)

81 82 83
2 84 85 86
2-1/2 +.031                       87
3                      88

This Standard takes precedence over documents referenced herein.
Reference documents shall be of the issue in effect on the date of invitation for bid.

P.A.              NAVY - WP

Other Cust
                   Army -  WC
                    USAF - 69

TITLE

SETSCREW, HEXAGON SOCKET, CONE POINT, 250°F
SELF LOCKING ELEMENT, CORROSION RESISTING STEEL, PASSIVATED

MILITARY STANDARD
MS18068 per NASM18068

PROCUREMENT SPECIFICATION
FF-S-200 & MIL-F-18240

SUPERSEDES:

SHEET  1  OF  2
APPROVED  4 JUNE 63               REVISED A  22 DECEMBER 64

 

 

FED.SUP CLASS
5303

 

(a) Unassigned dash numbers shall not be used

(b) Socket end of screw shall be flat and chamfered. The chamfer shall extend to the minor diameter of the thread and the edge between flat and chamfer shall be slightly rounded.

(c) Location of effective locking area "X" shall be in accordance with MS 15981 except as noted herein.

(d) PMax. = Maximum point plus minimum of 1 thread pitch. For ease in starting, locking element shall not be effective within this area.

(e) Maximum major thread diameter plus .010 = Maximum ring gage diameter that locking region of part must pass through freely or with finger pressure.

(f) See MS51965 and MS51966 for set screws without self-locking feature.

(g) As MIL-F-18240 doesn't establish torque requirements for items above heavy line, only a positive indication of torque is required.

MATERIAL:                Steel corrosion resisting; Federal Standard 66, numbers 302, 303, 304, 316 or equal to
                                  or interchangeable with 16:18 Chromium Nickel-Alloy Steel.

LOCKING
ELEMENT:                 In accordance with Specification MIL-F-18240.

DESIGN
AND USAGE
LIMITATIONS:           See MS 15981.

TREATMENT:            Passivated (See Procurement Specifications).

MAGNETIC
PERMEABILITY:        These screws have a magnetic permeability of 2.0 maximum (air=1.0) for a field of H=200
                                 orsteds using a magnetic indicator per MIL-I 17214.

EXAMPLE
OF PART
NUMBER:                 MS-18068-57 = 1/4-28UNF-3A x 3/4 long corrosion resisting steel cone point self-locking set
                                screw.

 

P.A.              NAVY - WP

Other Cust
                   Army -  WC
                    USAF - 69

TITLE

SETSCREW, HEXAGON SOCKET, CONE POINT, 250°F
SELF LOCKING ELEMENT, CORROSION RESISTING STEEL, PASSIVATED

MILITARY STANDARD
MS18068 per  NASM18068
PROCUREMENT SPECIFICATION
FF-S-200 & MIL-F-18240
SUPERSEDES: SHEET  2   OF  2
APPROVED  4 JUNE 63               REVISED A  22 DECEMBER 64

 

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