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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

Nitronic 60 per ASTM-A-479 or AMS 5848

Finish

Passivate per ASTM A967

Lubricant

Dry Film Lubricant per AS5272, Type 1

Internal Thread Lock

Yes

Internal Thread Size

0.2500-28 UNJF-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.)

0.330

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 428L

Removal Drill Depth ±.010

0.1875

Removal Drill Size

0.281