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MS/NAS Style - 303 CRES Keylocking Threaded Inserts
Heavy Duty- Metric

Material: Insert - 303 CRES
  Keys- 302 CRES
Finish: Passivated
Tolerances: ±.25 mm unless specified otherwise
Internal Threads: Per Fed Std H28/21, MJ Form
Dimensions: All dimensions below are in millimeters
Keys: Inserts with an internal thread size of M6 and smaller are furnished with 2 locking keys. Larger sizes have 4 locking keys.
Material Identification Mark: None
Lubrication: Dry Film Lube on Self-Locking Inserts only
Performance: There is no National Aerospace Standard for Metric Keylocking Inserts manufactured from 303 CRES. The inserts are compliant with the other requirements of NA0147, NA0149, and NA0151 except for any references to the type of material or performance related to the material.
 

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Insert Installation/
Removal
Non-Locking Self-Locking Dimensions
ACME Part Number Internal
Thread*
Class 4H5H
External
Thread
Class 4h
H
Length
J
±.76
K
C'Bore
Depth
Install Tool
Part No.
217-076363 217-077363 M4x0.7 M8x1.25 8.0 5.00 1.27 217-072663
217-076364 217-077364 M5x0.8 M10x1.25 10.0 5.50 1.27 217-072664
217-076365 217-077365 M6x1.0 M12x1.25 12.0 6.46 1.78 217-072665
217-076366 217-077366 M8x1.25 M14x1.5 14.0 6.46 1.78 217-072666
217-076566 217-077566 M8x1.0
217-076367 217-077367 M10x1.5 M16x1.5 16.0 6.46 2.29 217-072667
217-076567 217-077567 M10x1.25
217-076369 217-077369 M12x1.75 M18x1.5 18.0 7.23 2.29 217-072669
217-076569 217-077569 M12x1.25
217-076370 217-077370 M14x2.0 M20x1.5 20.0 7.73 2.79 217-072670
217-076570 217-077570 M14x1.5
217-076371 217-077371 M16x2.0 M 22x1.5 22.0 8.50 2.79 217-072671
217-076571 217-077571 M16x1.5
217-076572 217-077572 M18x1.5 M24x2.0 24.0 9.25 2.79 217-072672
217-076373 217-077373 M20x2.5 M30x2.0 30.0 12.51 2.79 217-072673
217-076573 217-077573 M20x1.5
217-076574 217-077574 M22x1.5 M32x2.0 32.0 12.51 2.79 217-072674
217-076375 217-077375 M24x3.0 M33x2.0 33.0 13.97 3.81 217-072675
217-076575 217-077575 M24x2.0
* Thread Class on M 4 and M 5 Internal Thread is 4H6H
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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