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MS/NAS Style - A286 CRES Keylocking Threaded Inserts
Heavy Duty- Inch

Material: Insert - A286 CRES (140 KSI Min)
  Keys- 302 CRES
Finish: Passivated
Tolerances: ±.010 inch unless specified otherwise
Internal Threads: Per SAE AS8879
Dimensions: All dimensions below are in inches
Keys: Inserts with an internal thread size of 5/16 and larger are furnished with 4 locking keys. Smaller sizes have 2 locking keys.
Material Identification Mark: One line on top of insert
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: MIL-I-45914A (MS51831& NAS1395)
 

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Insert Installation/
Removal
Non-Locking Self-Locking Dimensions
MS/NAS ACME Part Number MS/NAS ACME Part Number Internal
Thread
Class 3B
External
Thread (Mod.)
Class 2A
H
Length
J
±.030
K
C'Bore
Depth
Install Tool
Part No.
NAS1395CA08 217-078300 NAS1395CA08L 217-079300 8 - 32 5/16 - 18 .312 .22 .04 217-072590
MS51831CA101 217-078301 MS51831CA101L 217-079301 10 - 24 3/8 - 16 .312 .22 .07 217-072591
MS51831CA201
NAS1395CA3
217-078501 MS51831CA201L
NAS1395CA3L
217-079501 10 - 32 217-072592
MS51831CA102 217-078302 MS51831CA102L 217-079302 1/4 - 20 7/16 - 14 .375 .22 .07 217-072593
MS51831CA202
NAS1395CA4
217-078502 MS51831CA202L
NAS1395CA4L
217-079502 1/4 - 28 217-072594
MS51831CA103 217-078303 MS51831CA103L 217-079303 5/16 - 18 1/2 - 13 .437 .22 .07 217-072595
MS51831CA203
NAS1395CA5
217-078503 MS51831CA203L
NAS1395CA5L
217-079503 5/16 - 24 217-072596
MS51831CA104 217-078304 MS51831CA104L 217-079304 3/8 - 16 9/16 - 12 .500 .25 .07 217-072597
MS51831CA204
NAS1395CA6
217-078504 MS51831CA204L
NAS1395CA6L
217-079504 3/8 - 24 217-072598
MS51831CA105 217-078305 MS51831CA105L 217-079305 7/16 - 14 5/8 - 11 .625 .28 .10 217-072599
MS51831CA205
NAS1395CA7
217-078505 MS51831CA205L
NAS1395CA7L
217-079505 7/16 - 20 217-072600
MS51831CA106 217-078306 MS51831CA106L 217-079306 1/2 - 13 11/16 - 11 NS .688 .28 .10 217-072601
MS51831CA206
NAS1395CA8
217-078506 MS51831CA206L
NAS1395CA8L
217-079506 1/2 - 20 217-072602
MS51831CA107 217-078307 MS51831CA107L 217-079307 9/16 - 12 13/16 - 16 .812 .32 .10 217-072603
MS51831CA207
NAS1395CA9
217-078507 MS51831CA207L
NAS1395CA9L
217-079507 9/16 - 18 217-072604
MS51831CA108 217-078308 MS51831CA108L 217-079308 5/8 - 11 7/8 - 14 .875 .33 .10 217-072605
MS51831CA208
NAS1395CA10
217-078508 MS51831CA208L
NAS1395CA10L
217-079508 5/8 - 18 217-072606
MS51831CA109 217-078309 3/4 - 10 1-1/8 - 12 1.125 .10 217-072607
MS51831CA209 217-078509 3/4 - 16 217-072608
MS51831CA109L 217-079309 3/4 - 10 1.250 .49 217-072607
MS51831CA209L 217-079509 3/4 - 16 217-072608
MS51831CA110 217-078310 7/8 - 9 1-1/4 - 12 1.250 .10 217-072609
MS51831CA210 217-078510 7/8 - 14 217-072610
MS51831CA110L 217-079310 7/8 - 9 1.375 .49 217-072609
MS51831CA210L 217-079510 7/8 - 14 217-072610
MS51831CA111 217-078311 1" - 8 1-3/8 - 12 1.375 .10 217-072611
MS51831CA211 217-078511 1" - 12 217-072612
MS51831CA111L 217-079311 1" - 8 1.500 .55 217-072611
MS51831CA211L 217-079511 1" - 12 217-072612
For inserts with the following options, add the letter code shown to the end of the Acme part number:
S — Silver Plate per AMS 2410
SN — Silver Plate Only, No Dry Film Lube (Self-Locking Inserts Only
DFL — Dry Film Lube (Non-Locking INserts Only)
K — Self Broaching Keys



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