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Data Table

Order No. Order by articlenumber Type Order by parameter d1 class 3B Order by parameter Thread type d1 Order by parameter d2 class 2A Order by parameter Thread type d2 Order by parameter l1 Order by parameter l2 thread length Order by parameter Inst. tool ref. TR1700 Order by parameter Inst. tap drill size +,003 -,001 Order by parameter Inst. c'sink hole size +,010 -,000 Order by parameter Inst. thread tap size class 2B Order by parameter Inst. thread tap min. depth Order by parameter Rem. drill size Order by parameter Rem. drill depth Order by parameter
TR1661.81283 SL 2-56 UNC 8-32 UNC ,120 ,90 .0830 ,134 ,166 8-32 ,140 #33 1/16
TR1661.81284 SL 4-40 UNC 10-32 UNF ,170 ,125 .0840 ,161 ,194 10-32 ,160 #29 3/32
TR1661.81285 SL 6-32 UNC 12-28 UNF ,170 ,125 .0850 ,187 ,220 2-28 ,160 #21 3/32
TR1661.81286 SL 8-32 UNC 1/4-28* UNF ,220 ,175 .0860 ,228 ,255 1/4-28 ,210 # 8 1/8

Technical & Application

Material

Inserts - 4140 alloy steel (160 KSI Min).
Keys - 302 CRES.
Cadmium plate (QQ-P-416 Type II, Cl. 2). Dry film lubrication on self-locking inserts only.

Technical Notes

All dimensions in inches.
Internal threads: to SAE AS8879.
General tolerances -
+/- 0,010 unless specified.
Tap drill hole tolerances -
0,234 to 0,500 = +0,004/-0,001
0,500 and over = +0,005/-0,001
SL = Self-Locking type, deliberate deformity in thread produces self-affect once installed (see technical diagram).

Tips

Order installation tool separately, as identified by "Inst. Tool ref." in table.

Important Notes

Four locking keys on internal threads 5/16 and over. Two locking keys on internal threads smaller than 5/16.
Installation (Inst.) drill size, counter sink, thread tap and thread depth as specified in table.
Removal (Rem.) drill size and drill depth as specified in table.
Perform to standards: MIL-I-45914A (MS51830)
* Modified minor dia.

CAD & Data Sheets

Product Datasheets

TR1661 Threaded Insert MS/NAS - Mini - Inch 317 kB pdf
Miniature 3 MB pdf
Threaded Inserts 27 MB pdf

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