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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, 125 KSI Minimum Tensile Strength

Finish Description

Cadmium Plate per AMS-QQ-P-416, Type II, Class 2

Lube Description

Dry Film Lubricant per AS5272, Type 1

Internal Thread Lock

No

Internal Thread Size

0.6250-18 UNJF-3B

External Thread Size

0.8750-14 UNF-2A

Modified Minor Diameter

0.815/0.807

Shear Engagement Area (in²) Ref.

1.4866

C DIA ±.005

0.640

C'Bore Depth ±.010

0.100

L ±.010

0.875

Tap Drill Diameter

0.833/0.827

C'Sink Diameter
+.010
-.000

0.885

Thread Tap Size

0.8750-14 UNF-2B

Thread Tap Depth Min

1.000

Installation Tool Part Number

THD 1018L

Removal Drill Size

0.781

Drill Depth ±.010

0.1875