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KNH, MS51831, NAS1395 Series
Unit of Measure

Insert Type

Heavy Duty

Material

Chrome Moly Steel, Type 4140 per MIL-S-5626 or Type 8740 per AMS 6322, 160 KSI Minimum Tensile Strength

Finish Description

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

Lube Description

None

Internal Thread Lock

No

Internal Thread Size

0.8750-9 UNJC-3B

External Thread Size

1.2500-12 UNF-2A

Modified Minor Diameter

1.175/1.165

Shear Engagement Area (in²) Ref.

3.1370

C DIA ±.005

0.888

C'Bore Depth ±.010

0.100

L ±.010

1.250

Tap Drill Diameter

1.192/1.186

C'Sink Diameter
+.010
-.000

1.270

Thread Tap Size

1.2500-12 UNF-2B

Thread Tap Depth Min

1.440

Installation Tool Part Number

THD 1409L

Removal Drill Size

1.094

Drill Depth ±.010

0.3125