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MS/NAS Style - 303 CRES Keylocking Threaded Inserts
Miniature - 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: Miniature inserts are furnished with 2 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 4H6H
External
Thread
Class 4h
G
Thread
Length
H
Length
Install Tool
Part No.
217-076382 217-077382 M2 x 0.4 M4 x 0.7 2.20 3.00 217-072682
217-076383 217-077383 M2.5 x 0.45 M4.5 x 0.75 2.70 3.81 217-072683
217-076384 217-077384 M3 x 0.5 M5 x 0.8 3.10 4.25 217-072684
217-076386 217-077386 M4 x 0.7 M6 x 0.75 4.11 5.25 217-072686
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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