規格　ボルト　（5）　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　SeekAtec

MS20004　シリーズ　六角穴付ボルト
PROCUREMENT
SPECIFICATION		 TITLE CLASSIFICATION
MIL-B-７８３８ BOLT,INTERNAL WRENCHING
160,000PSI FTU AND 96,000 PSI FSU		 STANDARD PART
MS 20004 THRU 20014
Basic
MS
Part No.
 Thread
T		 A
Diameter		 B
Diameter		 C
Dia		 D E F
Min		 H
Hex		 J K M
Dia
+.005
-.000		 N
Max
Rad
Max Min Max Min Max Min
20004 1/4-28UNF-3A 0.2492 0.2477 0.438 0.428 0.342 0.25 0112 0.068 0.19 0.188 0.078 0.063 0.062 0.010
20005 5/16-24UNF-3A 0.3117 0.3102 0.531 0.521 0.394 0.312 0.144 0.094 0.221 0.219 0.094 0.055
20006 3/8-24UNF-3A 0.3742 0.3727 0.649 0.639 0.52 0.375 0.183 0.116 0.315 0.313 0.125 0.011
20007 7/16-20UNF-3A 0.4367 0.4347 0.75 0.74 0.534 0.438 0.208 0.141 0.156
20008 1/2-20UNF-3A 0.4991 0.4971 0.828 0.818 0.625 0.5 0.247 0.169 0.3785 0.3755 0.172
20009 9/16-18UNF-3A 0.5616 0.5596 0.938 0.928 0.723 0.562 0.279 0.19 0.441 0.438 0.203 0.094
20010 5/8-18UNF-3A 0.624 0.622 1.05 1.04 0.826 0.625 0.317 0.216 0.5032 0.5005 0.234 0.019
20012 3/4-16UNF-3A 0.7488 0.7468 1.23 1.22 0.921 0.75 0.385 0.273 0.566 0.563 0.281 0.022
20014 7/8-14UNF-3A 0.8737 0.8707 1.438 1.438 1.083 0.875 0.45 0.327 0.6295 0.5357 0.344
Basic
MS
Part No.		 P
Rad		 R
Rad		 S
MIn
Ref		 U
±.016		 V
Max		 W
Max		 Tensile
Strength
Lb MIn		 Concentricity MATERIAL: Alloy steel. See procurement spec.

Finish: Cadmium plate,QQ-P-416, Type ll, Class 3

HARDNESS:Rockwell C34 to C40

Dimension are after plating and in inches. Unless otherwise specified, tolerances: decimals ±.010, angles ±1°.
Max Min Max Min X Y Z
20004 0.02 0.01 0.041 0.031 0.475 0.031 0.187 0.25 6,190 0.005 0.007 0.0045
20005 0.537 0.047 9,820 0.006 0.008
20006 0.057 0.047 0.662 15,200 0.008 0.01
20007 0.767 20,600 0.009 0.011 0.006
20008 27,400 0.01 0.012
20009 0.85 0.062 34,800 0.011 0.014
20010 0.073 0.063 0.912 43,600 0.012 0.016
20012 0.03 0.015 1.037 63,200 0.015 0.018
20014 1.162 0.078 86,100 0.018 0.022 0.009
GRIP MS 20004 thru 20014: LENGTH: ±.015
DASH
No.		 GRIP
±.010		 MS
20004
1/4		 MS
20005
5/16		 MS
20006
3/8		 MS
20007
7/16		 MS
20008
1/2		 MS
20009
9/16		 MS
20010
5/8		 MS
20012
3/4		 MS
20014
7/8
4 .250 .750
6 .375 .875 .938 1.062
8 .500 1.000 1.062 1.188 1.312 1.312
10 .625 1.125 1.188 1.312 1.438 1.438 1.500 1.562
12 .750 1.250 1.312 1.438 1.562 1.562 1.625 1.688 1.812
14 .875 1.375 1.438 1.562 1.688 1.688 1.750 1.812 1.938 2.062
16 1.000 1.500 1.562 1.688 1.812 1.812 1.875 1.938 2.062 2.188
18 1.125 1.625 1.688 1.812 1.938 1.938 2.000 2.062 2.188 2.312
20 1.250 1.750 1.812 1.938 2.062 2.062 2.125 2.188 2.312 2.438
22 1.375 1.875 1.938 2.062 2.188 2.188 2.250 2.312 2.438 2.562
24 1.500 2.000 2.062 2.188 2.312 2.312 2.375 2.438 2.562 2.688
26 1.625 2.125 2.188 2.312 2.438 2.438 2.500 2.562 2.688 2.812
28 1.750 2.250 2.312 2.438 2.562 2.562 2.625 2.688 2.812 2.938
30 1.875 2.375 2.438 2.562 2.688 2.688 2.750 2.812 2.938 3.062
32 2.000 2.500 2.562 2.688 2.812 2.812 2.875 2.938 3.062 3.188
34 2.125 2.625 2.688 2.812 2.938 2.938 3.000 3.062 3.188 3.312
36 2.250 2.750 2.812 2.938 3.062 3.062 3.125 3.188 3.312 3.438
38 2.375 2.875 2.938 3.062 3.188 3.188 3.250 3.312 3.438 3.562
40 2.500 3.000 3.062 3.188 3.312 3.312 3.375 3.438 3.562 3.688
42 2.625 3.125 3.188 3.312 3.438 3.438 3.500 3.562 3.688 3.812
44 2.750 3.250 3.312 3.438 3.562 3.562 3.625 3.688 3.812 3.938
46 2.875 3.375 3.438 3.562 3.688 3.688 3.750 3.812 3.938 4.062
48 3.000 3.500 3.562 3.688 3.812 3.812 3.875 3.938 4.062 4.188
50 3.125 3.625 3.688 3.812 3.938 3.938 4.000 4.062 4.188 4.312
52 3.250 3.750 3.812 3.938 4.062 4.062 4.125 4.188 4.312 4.438
54 3.375 3.875 3.938 4.062 4.188 4.188 4.250 4.312 4.438 4.562
56 3.500 4.000 4.062 4.188 4.312 4.312 4.375 4.438 4.562 4.688
58 3.625 4.125 4.188 4.312 4.438 4.438 4.500 4.562 4.688 4.812
60 3.750 4.250 4.312 4.438 4.562 4.562 4.625 4.688 4.812 4.938
62 3.875 4.375 4.438 4.562 4.688 4.688 4.750 4.812 4.938 5.062
64 4.000 4.500 4.562 4.688 4.812 4.812 4.875 4.938 5.062 5.188
66 4.125 4.625 4.688 4.812 4.938 4.938 5.000 5.062 5.188 5.312
68 4.250 4.750 4.812 4.938 5.062 5.062 5.125 5.188 5.312 5.438
70 4.375 4.875 4.938 5.062 5.188 5.188 5.250 5.312 5.438 5.562
72 4.500 5.000 5.062 5.188 5.312 5.312 5.375 5.438 5.562 5.688
74 4.625 5.125 5.188 5.312 5.438 5.438 5.500 5.562 5.688 5.812
76 4.750 5.250 5.312 5.438 5.562 5.562 5.625 5.688 5.812 5.938
78 4.875 5.375 5.438 5.562 5.688 5.688 5.750 5.812 5.938 6.062
80 5.000 5.500 5.562 5.688 5.812 5.812 5.875 5.938 6.062 6.188
82 5.125 5.625 5.688 5.812 5.938 5.938 6.000 6.062 6.188 6.312
84 5.250 5.750 5.812 5.938 6.062 6.062 6.125 6.188 6.312 6.438
86 5.375 5.875 5.938 6.062 6.188 6.188 6.250 6.312 6.438 6.562
88 5.500 6.000 6.062 6.188 6.312 6.312 6.375 6.438 6.562 6.688
90 5.625 6.125 6.188 6.312 6.438 6.438 6.500 6.562 6.688 6.812
注：指示なきすべての寸法はインチ, 1 インチ　= 25.4mm