PEMPEM Fastener Catalogue
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CLA–0420–3

CLA / SL / PEM RT / SH / SMPS / SMPP / H / HNL Nuts · Unified · PDF page 29 · PEM Fastener Catalogue

CLA / SL / PEM RT / SH / SMPS / SMPP / H / HNL Nuts · Unified · thread .250-20 (1/4-20)

Aluminium nut, No plating suffix.

Also written as CLA-0420-3.

Part number breakdown

SegmentCodeMeaning
TypeCLAAluminium nut
Thread0420Thread size .250-20 (1/4-20)
Shank3—

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.250-20 (1/4-20)
Type (Fastener Material) › AluminumCLA
Thread Code0420
Shank Code3
A (Shank) Max..120
Min. Sheet Thickness.125
Hole Size In Sheet ±.003 −.000.344
C Max..343
E ±.010.440
T ±.010.170
Min. Dist. Hole ℄ To Edge.34

Material and finish

PropertyValue
TypeCLA
ThreadsInternal ASME B1.1 2B/ASME B1.13M, 6H
Fastener MaterialsAluminum
Standard FinishesNo Finish
For use in Sheet HardnessHRB 50/ HB 82 or less

Source: Material and Finish Specifications · PDF page 33

Installation tooling

PropertyValue
Thread Code0420
Anvil Dimensions (in.) › A ±.002.454
Anvil Dimensions (in.) › P ±.005.150
Anvil Part Number975200038
Punch Part Number975200048

Source: CLA™ Nuts · PDF page 34

Source

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Part number breakdownDimensionsMaterial and finishInstallation toolingSource