PEMPEM Fastener Catalogue
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SMPP–440

H / HNL Prevailing Torque Locknuts and SMPS / SMPP Nuts · Unified · PDF page 33 · PEM Fastener Catalogue

H / HNL Prevailing Torque Locknuts and SMPS / SMPP Nuts · Unified · thread .112-40 (#4-40)

SMPP thin-sheet nut, Passivated and/or tested per ASTM A380.

Also written as SMPP-440.

Part number breakdown

SegmentCodeMeaning
TypeSMPPSMPP thin-sheet nut
Thread440Thread size .112-40 (#4-40)

Dimensions

Defines E, C, A, T1, T2. The image displays technical diagrams for two types of self-clinching nuts, highlighting their dimensions: Type H: E: Overall diameter. C: Shank diameter. A: Shank length/height. T₁: Body thickness. Type HNL: E: Overall diameter. C: Shank diameter. A: Shank length/height. T₂: Body thickness (design includes a distinct flange or locking feature compared to Type H. Common Features: Both types feature a knurled clinching ring for securing into thin metal sheets. Internal threading for screw attachment. "Clinching profile may vary" based on the provided context.Defines E, C, A, T. Technical drawing of a clinch nut featuring the following dimensional parameters: E: Flange outer diameter C: Pilot/clinching diameter A: Clinching feature height T: Total nut thickness Note: The clinching profile design may vary.
DimensionValue
Thread Size.112-40 (#4-40)
Type – Fastener Material › Hardened Stainless SteelSMPP
Thread Code440
A (Shank) Max..024
Min. Sheet Thickness.025
Hole Size In Sheet +.003 −.000.166
C Max..165
E ±.010.220
T ±.010.065
Min. Dist. Hole ℄ To Edge › SMPS.17
Min. Dist. Hole ℄ To Edge › SMPP.20

Material and finish

PropertyValue
TypeSMPP
ThreadsInternal ASME B1.1 2B/ASME B1.13M, 6H
Fastener MaterialsAge Hardened A286 Stainless Steel
Standard FinishesPassivated and/or Tested per ASTM A380
For use in Sheet HardnessHRB 90/ HB 192 or less

Source: Material and Finish Specifications · PDF page 33

Performance data

PropertyValue
TypeSMPP
Thread Code440
Test Sheet Material › .029" 304 Stainless Steel HRB 89 › Installation (lbs.)4500
Test Sheet Material › .029" 304 Stainless Steel HRB 89 › Pushout (lbs.)75
Test Sheet Material › .029" 304 Stainless Steel HRB 89 › Torque-out (in. lbs.)15

Source: SMPP™ Nuts · PDF page 39

Installation tooling

PropertyValue
Thread Code440
Anvil Dimensions (in.) › A ±.002.233
Anvil Dimensions (in.) › P +.000 –.001.060
Anvil Dimensions (in.) › R Max..010
Anvil Dimensions (in.) › R1 +.005.005
Anvil Part Number8021386
Punch Part Number975200048

Source: SMPP™ Nuts · PDF page 35

Source

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Part number breakdownDimensionsMaterial and finishPerformance dataInstallation toolingSource