SO-RT440-8ZI - Thru-hole Threaded Standoffs - Types SO, SOA, SOS - PEM® Fastening Products

SO-RT440-8ZI

Thru-hole Threaded Standoffs – Types SO, SOA, SOS

Standoffs / SO-RT440-8ZI
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SO-RT440-8ZI

Thru-hole Threaded Standoffs – Types SO, SOA, SOS

The PEM RT® free-running locking feature allows the mating screw to turn freely until clamp load is applied. If the tightening force is removed, these standoffs no longer provide any torsional resistance to rotation until clamp load is reapplied.

• Improves load distribution among all threads, reducing stress on first engaged thread. • Turns freely until clamp load is applied. • Resistant to vibrational loosening. • Locking feature reusability is not affected by number of on/off cycles. • Uses same mounting hole and installation tooling as standard standoff.

Specifications

Thread Code
RT440
Thread Size
.112-40 (#4-40)
Fastener Material
Hardened Carbon Steel
Standard Finish
5um, Colorless, SC1, Type III, Zinc plated per ASTM B633
For Use in Sheet Hardness
HRB 80 / HB 150 or Less
Product Category
Thru-hole Threaded Standoffs – Types SO, SOA, SOS – Unified
Thread Type
RT Thread Form, Internal
Brand
PEM
Installation Equipment/Method
Self-Clinching
PEM Product Family
SO
Product Type
Standoffs
Through Hole/Blind
Through Hole
C + .000 – .005_in
0.165in
H – Nom._in
0.187in
Hole Size in Sheet +.003 – .000_in
0.166in
L +.002 -.005_in
0.25in
Min. Dist. Hole C/L to Edge_in
0.23in

Installation & Performance Data

TypeThread CodeTest Sheet MaterialInstallation (lbs.)Haeger Part Number AnvilHaeger Part Number PunchPemserter Part Number AnvilPemserter Part Number PunchMax. Rec. Tightening Torque For Mating Screw (in. lbs.)PULL THRU (lbs.)Pushout (lbs.)Standoff MaterialTorque-out (in. lbs.)
SO SOS SOA BSO BSOS BSOA 440 .060” 5052-H34 Aluminum 1100 H-109-4/M3L H-108-0020L 970200487300 975200048 4.75 280 160 Steel 11
SO SOS SOA BSO BSOS BSOA 440 .060” Cold-rolled Steel 2200 H-109-4/M3L H-108-0020L 970200487300 975200048 4.75 330 225 Steel 19

Inventory

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