PEM® captive hardware for easy service access without loose components features available anti cross-threading techology.

PEM® brand captive panel screws are designed to help keep parts to a minimum and eliminate risks associated with loose hardware that could fall out and damage internal components. These panel fastener assemblies are ideal to attach metal panels or other thin material components in applications where subsequent access will be necessary.

ANTI CROSS-THREADING TECHNOLOGY

PennEngineering® is a licensee for MAThread® anti cross-threading technology. Originally developed for the demands of the automotive industry, this patented design helps speed assembly and reduces or eliminates failures, repairs, scrap, downtime, and warranty service associated with thread damage. PEM® brand captive panel screws, like most of PEM’s externally threaded products feature anti cross-threading technology as an available option.

Here is a video illustrating MAThread.

Here's an overview of the PEM® brand captive panel screw range.

HEIGHT COMPARISON GUIDE AND STANDARD DRIVER RECESS

Installed and fastened height above sheet for M3 Thread size.

CAPTIVE PANEL SCREW SELECTOR GUIDE

PEM® PF11™, PF12™, PF15™, PF11MF™, PF11MW™, AND PEM® C.A.P.S.® CAPTIVE PANEL SCREWS

Self-Clinching; Flare-mounted; and Floating

• Available in three installation types; self-clinching, flare-mounted and floating
• All have the same profile or look above the sheet or panel
• Standard selection of knobs include knurled, semi-smooth or smooth metal caps and plastic PEM C.A.P.S.® (Colored Access Panel Screws)

Key Features Include:

• Shoulder on retainer to provide positive stop during installation.
• Anti cross-threading feature (designated with an “M” in the part number). Eases assembly, aligns components, improves assembly line productivity, prevents jamming, and slides through clogged internal threads.
• We offer a solution that is compliant with ATCA® specifications.
  
  

Standard Mounting Styles

Self-clinching >

• Installs flush on back side of panel
• Available in three screw lengths

Flare-mounted >

• Appropriate for close centerline-to-edge applications
• Does not require high installation force
• Installs into any panel hardness
• Installs flush on back side of panel
• Can be installed into most any thin material
• Appropriate for painted panels

Flare-mounted, Floating >

• Compensates for mating hole misalignment
• Installs into any panel hardness
  
  

Standard Cap Selection

Knurled Metal Cap >

• All metal cap available with knurls

Smooth Metal Cap >

• All metal cap available without knurls

Semi-smooth Metal Cap >

• All metal cap available with partial knurls

Black Metal Cap >

• DuraBlack™ finish is scratch resistant
• Finish is on both metal cap and screw (finish code “BL”)

Plastic Cap >

• Available with custom color plastic cap
  
  

Available Drive Configurations

PF11™/PF12™/PF15™ CAPTIVE PANEL SCREWS

PF11, Knurled Cap >

PF12, Smooth Cap >

PF15, Semi-smooth Cap >

Semi-smooth cap design reduces scratches

PFMF™ FLARE-MOUNTED CAPTIVE PANEL SCREWS

PF11MF, Knurled Cap >

PF12MF, Smooth Cap >

PFMW™ FLARE-MOUNTED, FLOATING CAPTIVE PANEL SCREWS

PF11MW, Knurled Cap>

PF12MW, Smooth Cap>

PEM® C.A.P.S.® CAPTIVE PANEL SCREWS

Standard Black>

Color Capabilities

Choose a knob color code and add it to the end of the base part number.

PEM® PFHV™ CAPTIVE PANEL SCREWS

• Compact, low profile design for limited access applications
• Low-cost captive screw design to replace loose hardware
• Two screw lengths
• Universal slot/Phillips recess standard with available Torx® recess
• Available with MAThread® anti cross-thread technology.

PEM® PF7M™ AND PF7MF™ CAPTIVE PANEL SCREWS

• Smallest footprint, spring-loaded panel fastener for limited access applications
• MAThread® anti cross-thread technology
• Installs flush on back side of panel
• Available with Torx® recess
• PF7M Self-clinching style provides high pushout resistance
• PF7M does not require special hole preparation
• PF7MF is appropriate for close centerline-to-edge applications
• PF7MF does not require high installation force
• PF7MF installs into any panel hardness

PF7M>

PF7MF>

 

PF7MF™ FLARE-MOUNTED CAPTIVE PANEL SCREWS

PF7MF Patented>

 

PEM® PF30™, PF50™ AND PF60™ CAPTIVE PANEL SCREWS

• Low-profile design satisfies many functional and cosmetic requirements
• Convenient large head for tool or hand operation
• PF50/PF60 are available with Torx® recess
• PF50/PF60 are available with MAThread® anti cross-thread technology.

PF30, Knurled Cap>

PF50, Knurled Cap>

PF60, Smooth Cap>

 

PF30™/PF50™/PF60™ LOW-PROFILE CAPTIVE PANEL SCREWS

Available with DuraBlack™ finish>

 

PFC4™ AND PFC2P™ CAPTIVE PANEL SCREWS

• Fully concealed-head for tool-only access
• Comply with UL 60950 standards
• Available with MAThread® anti cross-thread technology
• Available with Torx® recess
• PFC4 installs into stainless steel sheets HRB 88 or less

PFC4>

PFC2Pwith DuraBlack™ finish>

 

A NOTE ABOUT FASTENERS FOR STAINLESS STEEL PANELS

In order for self-clinching fasteners to work properly, the fastener must be harder than the sheet into which it is being installed. In the case of stainless steel panels, fasteners made from 300 Series Stainless Steel do not meet this hardness criteria. It is for this reason that 400 series fasteners are offered (PFC4). However, while these 400 Series fasteners install and perform well in 300 Series stainless sheets they should not be used if the end product:

• Will be exposed to any appreciable corrosive presence
• Requires non-magnetic fasteners
• Will be exposed to any temperatures above 300˚F (149˚C)

 

PFC2™ AND PFS2™ CAPTIVE PANEL SCREWS

• Spring-loaded panel fastener for tool or hand operation
• Screw assemblies remain captive for easy mounting and removal

PFC2/PFS2>

Available with DuraBlack™ finish>

 

PTL2™ AND PSL2™ SPRING-LOADED PLUNGER ASSEMBLIES

• Positioning pins for sliding components such as drawer slides and equipment consoles
• Fast installation and removal of components
• Reverse side of sheet is flush when plunger is retracted
• PTL2 has quick lockout feature to hold plunger in fully retracted position
• For use in sheets of HRB 80 or less

PTL2/PSL2>

 

 

PEM® SCBR™/SCB™/SCBJ™ CAPTIVE PANEL SCREWS

• Permanently captivates into sheets as thin as .040” / 1.02 mm
• Lowest cost captive screw design to replace loose hardware
• Available with self-retracting (SCBR), axial float (SCB), or jacking feature (SCBJ)
• Appropriate for close centerline-to-edge applications

SCBR>

SCB>

SCBJ>

SCBR™ SPINNING CLINCH BOLT WITH SELF-RETRACTING FEATURE

SCBR retracted>

SCBR engaged>

 

SCB™/SCBJ™ SPINNING CLINCH BOLTS

SCBJ with jacking feature (L); SCB with axial float (R)>

 

PEM® HSCB™ HEAT SINK MOUNTING SYSTEM

The HSCB™ engineered mounting system provides secure attachment of a heat sink to the circuit board while providing firm contact to the chip component allowing optimum heat dissipation. The three-piece fastening system, sold individually, includes the screw, spring and receptacle nut. The clamp load created is determined by the spring rate and the amount of deflection that is designed into the joint of the hardware. The system also allows for slight expansion and contraction of the joint components without stress to the delicate circuitry. The unique “click” feature lets the user know when the fastener is completely installed.

System diagram>

HSCB>

HSL>

HSR>

• Screw cannot be overtightened. Audible “click” when fully engaged
• Screw and spring mount together permanently into the heat sink
• Spring determines clamp force
• Receptacle nut mounts permanently to the PC board
• Provides even, constant contact of heat sink to chip component
• Allows removal of heat sink if desired

 

PEM® PF10™ FLUSH-MOUNTED CAPTIVE PANEL SCREWS

• PF10 assembly sits flush in sheets as thin as .050” / 1.27 mm or flush on both sides in .125” / 3.2 mm sheets
• PS10 screw remains captive in retainer when disengaged
• PR10 retainer and F10 receptacle nut is for use in sheets of HRB 70 or less
• N10 nut is for use in sheets of HRB 80 or less
• Complies with UL 60950 standards

N10 Recepticle Nut; PR10 Retainer; & PS10 Screw>

 

REELFAST® SMTPFLSM™ SURFACE MOUNT CAPTIVE PANEL SCREWS

• All metal captive screw assembly installs in one piece utilizing pick and place method
• Combination drive, Torx®/slot
• Solderable finish

SMTPFLSM>

Reel>

 

REELFAST® SMTPF™ SURFACE MOUNT CAPTIVE PANEL SCREWS

• Retainer installed using conventional surface mount techniques
• Simply snap screw into retainer to complete assembly
• Black ABS knob standard
• Optional molded-through colors available
• Available with Torx® recess

Assembled>

Color capabilities for PSHP Screw>

 

PFK™ BROACHING CAPTIVE PANEL SCREWS

• For permanent and reliable installation in PC boards
• Screw assemblies remain captive for easy mounting and removal

PFK>

See way more detail by following the links to either the pdf or online catalogs.