Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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Unit of Measure

Specifications

T thread, -4H5H/4H6H Thread size

 N/A MJ27x1.5

T thread, -4H5H/4H6H Controlled minor dia

 N/A 25.576-25.652

A - MIN

 N/A 37.340

B - MIN

 N/A 55.200

C

 N/A 36.04-36.12

D

 N/A 27.66-27.71

E

 N/A 3.80-4.05

F

 N/A 7.36-7.49

G

 N/A 10.500-10.630

H (MIN)

 N/A 25.600

J (No. of Teeth)

 N/A 47

K (MIN)

 N/A 2.700

Porting Tool No.

 N/A RPTM295

Serration Broach Tool - Hand Held Impact Type

 N/A RFMOPB295

Serration Broach Tool - Hand Held Non-Impact Type

 N/A RFMOPB295HDB

Serration Broach Tool - EDM Type

 N/A RFMOPB295ED3

Serration Broach Tool - Wobble Type

 N/A RFMOPB295WB

Notes

N/A NOTES: UNLESS OTHERWISE SPECIFIED
1. THE DRILL AND PORTING TOOL METHOD OF PREPARING THE MACHINED CAVITY IS MANDATORY. DRILL 0.4-0.7 SMALLER THAN CONTROLLED MINOR DIA SPECIFIED: THE PORTING TOOL
WILL SIZE THE MINOR DIA AND PROVIDE BALANCE OF CAVITY CONFIGURATION READY FOR BROACHING SERRATION. USE OF PORTING TOOL AND BROACH TOOL SPECIFIED IS MANDATORY TO PROVIDE PROPER PORT CONFIGURATIONS.
2. AFTER SERRATIONS ARE BROACHED, CHIP REMOVAL IS REQUIRED.
3. THE MINIMUM BOSS DIA "B" AND BOSS LENGTH "H" SHOWN ARE SATISFACTORY FOR USE IN MATERIALS THAT EXHIBIT A MINIMUM SHEAR STRENGTH OF 140MPa.