Item # SFR5902A643D10R, Stud - Locked In, Ring Locked, Serrated, High Strength, Oversize Replacement On Howmet Aerospace

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Unit of Measure

Series	N/A SFR5902( )( )(D)L(R)
Material Specification	N/A MIL-S-6049
Material	N/A 8740 Alloy Steel per MIL-S-6049
Heat Treat	N/A 160 - 180 KSI UTS
Finish	N/A Cadmium plate per QQ-P-416, Type II, Class 3
Nut End Type	N/A Drilled
A Nut End Thread Size	N/A 0.2500-28 UNJF-3A
Stud End type	N/A Recess
B Stud End Thread Size	N/A 0.4375-20 UNJF-3B
B Stud End Thread-Pitch Diameter	N/A 0.4084-0.4067 in
B Stud End Thread-Minor Diameter	N/A 0.3795-0.3700 in
C ±.010	N/A 0.558 in
E - Dia +.005 -.004	N/A 0.316 in
F - Dia +.007 -.002	N/A 0.345 in
G - Dia +.000 -.015	N/A 0.370 in
H - Dia Min	N/A 0.294 in
J	N/A 20.000
K +2 -1	N/A 102.000 º
M ref	N/A 0.311 in
N -Dia	N/A 0.205 in
T ±.015	N/A 0.594 in
V	N/A 0.155 Inch
P - Dia ±.010	N/A 0.190 in
S ±.015	N/A 0.160 in
U - Dia +.005 -.002	N/A 0.067 in
L ±.015	N/A 0.625 in
Lockring - Carbon Steel	N/A RLRR1997-104
Lockring - A-286 Cres	N/A RLRR1997E104

Step Drill Part Number	N/A SDC453JF
Drive Wrench Number	N/A R1106W
Lockring Drive Tool Part Number	N/A SFR5902-4D

Notes

N/A

<1>The studend thread has a special pitch dia and minor dia which installs into a MIL-S-8879 tapped hole.
Surface Roughness: Machined surfaces to be 125microinches in accordance with ANSI B46.1 except serrated collar.
<3>Maximum 2 incomplete threads
Lockring RLRR1997-() series is 1117 Carbon Steel (ASTM A108), 36-45 HRC, Cad plated per QQ-P-416, TY II, Cl3.
Lockring RLRR1997E() series is A-286 Cres (AMS5731 or AMS6734), 269 HB Min, Passivated per QQ-P-35.
Fillets: R .030 Maximum
Edges: Edges broken .003-.015

Axis of hole to be normal to entry surface or provide spotface whenrequired.
Install insert to depth shown.
Drive lockring to depth shown.
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.
These studs are primarily designed for use in soft materials (alum, mag, etc). For use in harder materials, cotact us.