Item # SFR5902A642-24, 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 Undrilled
A Nut End Thread Size	N/A 0.1900-32 UNJF-3A
Stud End type	N/A No Recess
B Stud End Thread Size	N/A 0.3750-24 UNJF-3B
B Stud End Thread-Pitch Diameter	N/A 0.3512-0.3497 in
B Stud End Thread-Minor Diameter	N/A 0.3271-0.3185 in
C ±.010	N/A 0.433 in
D - Dia	N/A 0.189-0.186 in
E - Dia +.005 -.004	N/A 0.255 in
F - Dia +.007 -.002	N/A 0.284 in
G - Dia +.000 -.015	N/A 0.318 in
H - Dia Min	N/A 0.233 in
J	N/A 17.000
K +2 -1	N/A 86.000 º
T ±.015	N/A 0.469 in
V	N/A 0.142 Inch
P - Dia ±.010	N/A 0.137 in
L ±.015	N/A 1.500 in
Lockring - Carbon Steel	N/A RLRR1997-103
Lockring - A-286 Cres	N/A RLRR1997E103
Grip Length	N/A 1.031 in
Shank Length	N/A 0.095 in

Step Drill Part Number	N/A SCD390JF
Drive Wrench Number	N/A R1105W
Lockring Drive Tool Part Number	N/A SFR5902-3D

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.