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Lightweight Keenserts are available in a wide choice of sizes, lengths, and materials for virtually any requirement.

KN Series
Unit of Measure

Specifications

Insert Type

Lightweight Inserts

Material

Chrome Moly Steel, Type 4140 per MIL-S-5626 or Type 8740 per AMS 6322, 125 KSI Minimum Tensile Strength

Finish

Cadmium Plate per QQ-P-416, Type I, Class 3

Lubricant

Dry Film Lubricant per AS5272, Type 1

Internal Thread Lock

Yes

Internal Thread Size

0.2500-20 UNJC-3B

External Thread Size

0.3750-16 UNC-2A

Modified Minor Diameter

0.320/0.312

Shear Engagement Area (in²) Ref.

0.1726

C DIA ±.005

0.257

C'Bore Depth ±.010

0.070

L ±.010

0.375

A (Ref.)

0.360

Tap Drill Diameter

0.336/0.331

C'Sink Diameter
+.010
-.000

0.385

Thread Tap Size

0.3750-16 UNC-2B

Thread Tap Depth Min

0.430

Installation Tool Part Number

TD 420L

Removal Drill Depth ±.010

0.1875

Removal Drill Size

0.281