PEMPEM Fastener Catalogue
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S–RT0518–1ZI

CLA / SL / PEM RT / SH / SMPS / SMPP / H / HNL Nuts · Unified · PDF page 30 · PEM Fastener Catalogue

CLA / SL / PEM RT / SH / SMPS / SMPP / H / HNL Nuts · Unified · thread .313-18 (5/16-18)

PEM RT free-running locknut, Zinc plated per ASTM B633, SC1 (5µm), Type III, Colorless.

Also written as S-RT0518-1ZI.

Part number breakdown

SegmentCodeMeaning
TypeSPEM RT free-running locknut
ThreadRT0518Thread size .313-18 (5/16-18)
Shank1—
FinishZIZinc plated per ASTM B633, SC1 (5µm), Type III, Colorless

Dimensions

Defines E, C, A, T. Technical drawing of a self-clinching nut with dimensions in inches. Key Entities and Dimensions: PEM RT® Stamp: Indicated on the top face of the fastener. E: Outside diameter of the fastener. C: Diameter of the pilot/clinching feature. A: Height/thickness of the clinching shank. T: Overall thickness of the nut body. Clinching profile: Note specifies that the profile may vary. Components: Includes a threaded internal hole and a knurled/clinching base for sheet metal installation.Defines E, C, A, T. Entity: PEM TRI-DENT® Locking Feature (self-clinching nut. Dimensions (inches: E: Overall diameter. C: Clinch diameter. A: Shank length/clinch profile depth. T: Overall thickness. Key Features: Clinching profile (may vary. TRI-DENT locking feature identified by triangular markings and "PEM" lettering on the face. Locking feature shape and position may vary.Defines E, C, A, T. The image is a technical drawing of a self-clinching nut, showing top and side-cutaway views with labeled dimensions: E: Overall outer diameter of the flange. C: Diameter of the clinching pilot. A: Height/length of the clinching pilot. T: Thickness of the nut body. Feature: Internal threading and a serrated clinching profile. Note: Clinching profile may vary due to manufacturing procedure.
DimensionValue
Thread Size.313-18 (5/16-18)
TypeS
Thread CodeRT0518
Shank Code1
A (Shank) Max..054
Rec. Min. Sheet Thickness.056
Hole Size In Sheet +.003 −.000.413
C Max..412
E ±.010.500
T ±.010.230
Min. Dist. Hole ℄ To Edge.38

Material and finish

PropertyValue
TypePEM RT
ThreadsInternal ASME B1.1 2B/ASME B1.13M, 6H
Fastener MaterialsHardened Carbon Steel
Standard FinishesZinc Plated, per ASTM B633, SC1 (5µm), Type III, Colorless
Optional FinishZinc Plated per ASTM B633, SC1 (5µm), Type II, Yellow
For use in Sheet HardnessHRB 80/ HB 150 or less

Source: Material and Finish Specifications · PDF page 33

Performance data

TypeThread CodeShank CodeTest Sheet MaterialInstallation (lbs.)Pushout (lbs.)Torque-out (in. lbs.)
SRT051815052-H34 Aluminum4000-7000380120
SRT05181Cold-rolled Steel6000-8000420165

Source: PEM RT® Nuts · PDF page 37

Installation tooling

PropertyValue
Thread Code0518/RT0518
Anvil Dimensions (in.) › A ±.002.517
Anvil Dimensions (in.) › P ±.005.200
Anvil Part Number975200039
Punch Part Number975200048

Source: CLS™/CLSS™/S™/SS™/PEM RT® Nuts · PDF page 34

Source

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Part number breakdownDimensionsMaterial and finishPerformance dataInstallation toolingSource