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Unit of Measure

Insert Type

 N/A Standard

Series

 N/A RDJ3600

Material Type

 N/A 4340 Steel (Alternate 4140 Steel)

Material Specification

 N/A MIL-S-5000 (AMS-S-5625)

Heat Treat

 N/A 160-180 KSI UTS Min

Finish

 N/A Cadmium Plate per AMS-QQ-P-416, Type II plus Carbowax

Internal Thread Lock

 N/A Yes

A - Internal Thread, Class 3B

 N/A 0.1640-32 UNJC

B - External Thread

 N/A 0.3125-18

B - External Thread - Pitch Diameter

 N/A 0.2769-0.2789 in

B - External Thread - Minor Diameter

 N/A 0.2373-0.2468 in

C - Dia ±.005

 N/A 0.170 in

D ±.005

 N/A 0.075 in

E ±.015

 N/A 0.200 in

F ±.015

 N/A 0.280 in

G - Dia ±.005

 N/A 0.232 in
Step Drill1 N/A RCDC21-257
Basic Tap Size2 N/A 0.3125-18 UNC

Wrench Part Number

 N/A R1104W

Lockring Drive Tool Part Number

 N/A R3604D
Removal Drill Size3 N/A #6

N/A

  • The external thread has a special pitch diameter and minor diameter which installs into an AS8879 Class 3B, FED-STD-H28/2 Class 3B, or National Class 3 tapped hole.
  • <5> Internal thread locking feature complies with applicable portion of specification NASM25027 for 450°F.
  • "B" diameter and minor diameter of thread to be concentric within .003 FIM.
  • RD3600 Series inserts are designed for maximum loads in tension within the minimum envelope dimensions. The design data table lists test pull-out strenghts developed by the inserts when installed in 356-T6 and 2024-T4 aluminum alloys with ultimate shear strengths of 25,000 and 37,000 psi respectively. The calculated ultimate strengths of bolt heat-treated to 145,000 psi and 180,000 psi are listed for reference and are based on tensile stress areas listed in FED-STD-H28.
  • Unless otherwise specified dimensions are in inches & ASME Y14.5M.
  • 1 Step drills are designed for thru hole drilling. When used to drill a blind hole, it may be necessary to grind the drill to suit the depth required.
  • 2 Taps are not supplied by Howmet.
  • 3 Removal drills are not supplied by Howmet.