PEMPEM Fastener Catalogue
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BS–0420–1

B Self-Clinching Blind Fasteners · Unified · PDF page 17 · PEM Fastener Catalogue

B Self-Clinching Blind Fasteners · Unified · thread .250-20 (1/4-20)

Self-clinching blind fastener, 300 series stainless, Passivated and/or tested per ASTM A380.

Also written as BS-0420-1.

Part number breakdown

SegmentCodeMeaning
TypeBSelf-clinching blind fastener
Material CodeS300 series stainless
Thread0420Thread size .250-20 (1/4-20)
Shank1—

Dimensions

Defines T, L, A, E, B, C, F. The provided image contains technical drawings and part number information for PEM fasteners. Technical Drawing Details Metric Identification: Metric parts are identified by a large chamfer at the blind end. Trademark: PEM® "two groove" registered trademark is located near the head of the fastener. Dimensional Labels: L: Overall length of the fastener. T: Threaded length from head to end. F: Full thread depth. A: Height of the head. B: Diameter of the body/stud. C: Diameter of the clinching feature. E: Overall diameter of the head. Note: Clinching profile may vary.
DimensionValue
Thread Size.250-20 (1/4-20)
Type (Fastener Material) › Stainless SteelBS
Thread Code0420
Shank Code1
A (Shank) Max..054
Min. Sheet Thickness.056
Hole Size in Sheet +.003 −.000.344
B Max..305
C Max..343
E ±.010.430
F Min..310
L Max..500
T ±.010.560
Min. Dist. Hole ℄ to Edge.34

Material and finish

PropertyValue
TypeBS
ThreadsInternal, ASME B1.1, 2B / ASME B1.13M, 6H
Fastener Materials300 Series Stainless Steel
Standard FinishesPassivated and/or Tested Per ASTM A380
For Use in Sheet HardnessHRB 70 / HB 125 or less

Source: Material and Finish Specifications · PDF page 17

Installation tooling

PropertyValue
TypeB/BS
Thread Code0420/M6
Anvil Part Number975200005
Punch Part Number975200048

Source: PEMSERTER® Installation Tooling · PDF page 18

Performance data

PropertyValue
Thread Code0420
Shank Code1
Sheet Thickness (in.).056
Test Sheet Material › 5052-H34 Aluminum › Installation (lbs.)4000
Test Sheet Material › 5052-H34 Aluminum › Pushout (lbs.)315
Test Sheet Material › 5052-H34 Aluminum › Torque-out (in. lbs.)90
Test Sheet Material › Cold-Rolled Steel › Installation (lbs.)6000
Test Sheet Material › Cold-Rolled Steel › Pushout (lbs.)400
Test Sheet Material › Cold-Rolled Steel › Torque-out (in. lbs.)105

Source: Performance Data (1) · PDF page 18

PEM® 'two groove' registered trademark. Entity: PEM® Product: Metal fastener. Key Feature: "two groove" registered trademark design, located on the fastener head as indicated by the orange arrow. Resources: Fastener drawings and models are available at www.pemnet.com.

Source

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Part number breakdownDimensionsMaterial and finishInstallation toolingPerformance dataRelated drawingsSource