1、AMSC N/A FSC 5325 MS51993B 1 NOVEMBER 2012 SUPERSEDING MS51993A 28 JUNE 1976 DETAIL SPECIFICATION SHEET INSERT, SCREW THREAD-LOCKED IN, RING LOCKED, SERRATED, HIGH STRENGTH This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acqui
2、ring the product described herein shall consist of this specification sheet and procurement specification MIL-I-45910. FIGURE 1. INSERT, SCREW THREAD. INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51993B 2 TABLE I. Fine Internal and Fi
3、ne External Short Length. DASH NO. A INTERNAL THREAD UNJF-3B B EXTERNAL THREAD H MIN J K +2 -1C D E F G L M V LOCK RING PART NO. SIZE SEE THD NOTE PITCH DIA MINOR DIA +.005-.004 +.007-.002 +.000-.015 .020 .015 .015 -503 .1900-32 .3750-24 .3498 .3479 .3257 .3185 .206 .196 .201 .255 .284 .318 .233 17
4、86 .400 .078 .142 MS51997-103 -504 .2500-28 .4375-20 .4073 .4053 .3784 .3700 .267 .257 .261 .316 .345 .370 .294 20 102 .542 .089 .176 MS51997-104 -505 .3125-24 .5000-20 .4698 .4678 .4409 .4325 .336 .321 .324 .380 .407 .432 .357 24 102 .678 .099 .200 MS51997-105 -506 .3750-24 .6250-18 .5914 .5894 .55
5、93 .5498 .398 .383 .386 .456 .487 .549 .433 26 102 .750 .099 .200 MS51997-106 -507 .4375-20 .7500-16 .7122 .7097 .6761 .6656 .462 .447 .449 .567 .601 .665 .535 26 111 .813 .117 .200 MS51997-107 -508 .5000-20 .8750-14 .8316 .8291 .7904 .7786 .525 .510 .511 .687 .721 .778 .645 30 111 .948 .117 .255 MS
6、51997-108 TABLE II. Fine Internal and Fine External Medium Length. DASH NO. A INTERNAL THREAD UNJF-3B B EXTERNAL THREAD H MIN J K +2 -1C D E F G L M V LOCK RING PART NO. SIZE SEE THD NOTE PITCH DIA MINOR DIA +.005-.004 +.007-.002 +.000-.015 .020 .015 .015 -643 .1900-32 .3750-24 .3498 .3479 .3257 .31
7、85 .206 .196 .201 .255 .284 .318 .233 17 86 .448 .078 .142 MS51997-103 -644 .2500-28 .4375-20 .4073 .4053 .3784 .3700 .267 .257 .261 .316 .345 .370 .294 20 102 .616 .089 .176 MS51997-104 -645 .3125-24 .5000-20 .4698 .4678 .4409 .4325 .336 .321 .324 .380 .407 .432 .357 24 102 .776 .099 .200 MS51997-1
8、05 -646 .3750-24 .6250-18 .5914 .5894 .5593 .5498 .398 .383 .386 .456 .487 .549 .433 26 102 .872 .099 .200 MS51997-106 -647 .4375-20 .7500-16 .7122 .7097 .6761 .6656 .462 .447 .449 .567 .601 .665 .535 26 111 .948 .117 .200 MS51997-107 -648 .5000-20 .8750-14 .8316 .8291 .7904 .7786 .525 .510 .511 .68
9、7 .721 .778 .645 30 111 1.101 .117 .255 MS51997-108 TABLE III. Fine Internal and Coarse External Long Length. DASH NO. A INTERNAL THREAD UNJF-3B B EXTERNAL THREAD H MIN J K +2 -1C D E F G L M V LOCK RING PART NO. SIZE SEE THD NOTE PITCH DIA MINOR DIA +.005-.004 +.007-.002 +.000-.015 .020 .015 .015 -
10、803 .1900-32 .3750-16 .3372 .3347 .3011 .2906 .206 .196 .201 .255 .284 .290 .233 17 86 .538 .078 .142 MS51997-103 -804 .2500-28 .4375-14 .3941 .3916 .3529 .3411 .267 .257 .261 .316 .345 .341 .294 20 102 .731 .089 .176 MS51997-104 -805 .3125-24 .5000-13 .4531 .4506 .4087 .3963 .336 .321 .324 .380 .40
11、7 .396 .357 24 102 .932 .099 .200 MS51997-105 -806 .3750-24 .6250-11 .5693 .5668 .5168 .5028 .398 .383 .386 .456 .487 .502 .433 26 102 1.061 .099 .200 MS51997-106 -807 .4375-20 .7500-10 .6885 .6860 .6308 .6156 .462 .447 .449 .567 .601 .615 .535 26 111 1.156 .117 .200 MS51997-107 -808 .5000-20 .8750-
12、9 .8065 .8040 .7424 .7257 .525 .510 .511 .687 .721 .725 .645 30 111 1.333 .117 .255 MS51997-108 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51993B 3 TABLE IV. Interchangeability Cancelled (CRES 17-10P) New (CRES Type A-286) MS51993 P643 P644 P6
13、45 P647 P648 MS51993 C643 C644 C645 C647 C648 NOTES: 1. Material: (See material code letters under mechanical properties) Steel, alloy 4140 per SAE AMS6349 or SAE AMS6382. Steel, corrosion-resistant, Type A286 (UNS S66286) per SAE AMS5731, SAE AMS5732, SAE AMS5734 or SAE AMS5737. Titanium, alloy 6 A
14、l-4V, annealed per SAE AMS6931. 2. Protective coating: Steel, alloy shall be cadmium plated in accordance with SAE AMS-QQ-P-416, Type II, Class 3. Steel, corrosion-resistant, material code letter “S”, shall be passivated in accordance with SAE AMS2700 when internal non-lock thread is specified by pa
15、rt number. Steel, corrosion-resistant, material code letter ”S” shall be silver plated in accordance with ASTM B700, Type II, Grade B, .0002 thick when internal locking thread is specified by part number. Titanium, alloy, shall have an anodic coating. 3. Surface roughness: Machine surfaces shall be
16、125 microinches in accordance with ASME B46.1 except serrated collar. 4. Threads: The external thread has a special pitch diameter and minor diameter which installs into a SAE AS8879 class 3B tapped hole. Threads also shall be in accordance with procurement specification. 5. Heat treatment: Inserts
17、shall be heat treated to develop the mechanical properties specified herein. 6. Mechanical Properties. All of the above insert sizes in either short, medium, or long lengths are capable of developing 220,000 psi load rating based on the tensile stress area of the applicable bolt. Resistance to pull
18、out of the insert from the parent material is a function of shear engagement area of the external thread of the insert as defined in the procurement specification. Material code letters with pertinent length dash numbers are listed below: Material Code Letter Material M S T Steel, 4140 alloy Steel,
19、Type A286 cres Titanium, 6Al-4V alloy (“T” code only available as non-locking insert) 7. Hardness: Steel, alloy (code M) Rockwell C33 minimum. Steel, cres (code S) Brinell 248 minimum. Titanium, alloy (code T) Rockwell C39 maximum. 8. Fillets: .030 R max. 9. Edges: Break sharp edges .003 - .015 unle
20、ss otherwise specified. 10. Dimensions: Dimensions are in inches and are met after plating. 11. Tolerances: Linear dimensions .005, angular dimensions 2. 12. Part numbers: The MS part number shall consist of the basic MS number, plus the material code, plus the dash number. Add “L” as suffix for int
21、ernal thread lock.” Examples: MS51993 M 505 Insert, alloy steel, non-locking. MS51993 S 505 Insert, CRES, non-locking. MS51993 T 805 Insert, Titanium alloy, non-locking * MS51993 M 505 L Insert, alloy steel, internal thread lock * The same condition can exist for all of the above materials except “T
22、 code. 13. For design feature purposes, this standard takes precedence over procurement documents referenced herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS51993B 4 14. Referenced documents shall be of the same issue in effect on date of
23、invitation for bid. 15. CHANGES FROM PREVIOUS ISSUE. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. MILITARY INTEREST Custodians: Preparing activity: Army - AR DLA - IS Navy - AS Air Force - 99 (Project 5325-2
24、013-001) Review activities: Army AT, AV, MI Navy MC, OS, YD Air Force 71 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
