N7 Captive Nut 481 Thru hole and blind styles Blind hole version (top view) * Spring ejected * Knurled knob provides solid grip * Fastens to externally threaded studs * Helps speed panel replacement Thru hole version (top view) OA OA 0.8 (.03) Total float B B D Material and Finish Knob: Aluminum, natural D C E Unfastened Ferrule: Hardened steel, zinc plate, chromate plus sealer ACTUAL SIZE Fastened Notes: For use in material hardnesses RB85 or less, such as low carbon steels that are half hard or softer, stainless steels in the annealed condition and aluminum. Installation Notes Knob Captive Nut P X Panel thickness Frame thickness Ferrule Edge of hole must be sharp on this side. Do not chamfer OF Thread Size P Min. P Max. M3 M4 M5 M6 4-40 6-32 8-32 10-32 1/4-20 7.1 (.28) 10 (.40) 10.2 (.41) 12.4 (.49) 7.3 (.29) 9.9 (.39) 10.1 (.40) 10.3 (.41) 13 (.51) 9.5 (.37) 12.1 (.47) 12.2 (.48) 16.7 (.66) 9.4 (.37) 13.1 (.51) 13.3 (.52) 13.5 (.53) 16.5 (.65) Thread Size M3 or 4-40 6-32 UNC M4 or 8-32 M5 or 10-32 M6 or 1/4-20 Knob Style Min. Part Number Metric Inch Natural Natural Thru hole N7-02-10 N7-52-10 Blind hole N7-02-11 N7-52-11 Thru hole ~ N7-62-10 Blind hole ~ N7-62-11 Thru hole N7-22-10 N7-72-10 Blind hole N7-22-11 N7-72-11 Thru hole N7-32-10 N7-82-10 Blind hole N7-32-11 N7-82-11 Thru hole N7-42-10 N7-92-10 Blind hole N7-42-11 N7-92-11 OA B (Thread Length) Spring: 302 Stainless steel, passivated 0.9 (.036) Min. panel thickness OG 1. Prepare hole in panel as shown 2. Provide a solid back-up surface behind the panel 3. Press the assembly into the panel until only the top of the knurl on the ferrule is visible Threadstud insert selection for blind hole applications Frame thickness + panel thickness + P Minimum = X Minimum OH See page 543 for additional installation guidelines Frame thickness + panel thickness + P Maximum = X Maximum Threadstud insert length (L): X Minimum < "L" > X Maximum Notes: Recommended minimum distance from edge of panel to centerline of hole is 1.5 x O H. "L" values greater than X Maximum must use the thru hole version C D E OF OG OH 6.4 (.25) 5.5 (.22) 5.60.04 (.220.002) 7.1 (.28) 6.3 (.25) +0.03 6.4 -0.05 (.252 +.001 ) -.002 8.7 (.34) 7.9 (.31) 8 (.315 9 (.35) 7.9 (.31) 8 (.315 10 (.39) 9.4 (.37) 9.5 (.374 10.6 (.42) 3.6 (.14) ~ 12.8 (.50) 9.3 (.37) 4 (.16) 9.2 (.36) 16.8 (.66) 13.3 (.52) 11.4 (.45) 4.7 (.19) ~ 17.7 (.70) 12.5 (.49) 5.4 (.21) 13 (.51) 23 (.91) 17.9 (.70) 13 (.51) 4.5 (.180 ~ 17.7 (.70) 12.5 (.49) 5.4 (.21) 13.2 (.52) 23 (.91) 17.9 (.70) 13 (.51) 4.5 (.180 ~ 17.7 (.70) 12.5 (.49) 5.4 (.21) 13.2 (.52) 23 (.91) 17.9 (.70) 14.6 (.58) 6.4 (.25) ~ 22.8 (.90) 16 (.63) 7 (.28) 16.4 (.65) 29.5 (1.16) 23 (.91) If a weld stud is used, omit the frame thickness from the calculations (see the table and diagram to the right) *The above dimensions are for blind hole captive nuts +0 -0.08 +0 ) -.003 +0 -0.08 +0 ) -.003 +0.1 -0 +.004) -0 Dimensions in millimeters (inch) unless otherwise stated www.southco.com/N7 543 Installation Guidelinesfor SOUTHCO (R) Self-Clinching products Self-clinching product installation is offeredPunch on side these Ferrule (R) of panel Rollover SOUTHCO products, making them easy-to-use captive Area of material that moves into Material panel fasteners: groove thickness Panel * Captive Screws Die side Mounting hole of panel * Receptacles for Quarter-turn Fasteners Mounting hole * Receptacles for Fast-lead Thread Screws diameter Panel edge * Spring-loaded Plungers * Captive Nuts Ferrule of material * Threaded Area Inserts Panel When pressed into a properly prepared hole, self-clinching captive fasteners cold-flow (move) the panel material into the retaining groove of Centerline of mounting hole 1.5 x O Min. the fastener. This material then retains the fastener in the panel. Before installation Ferrule Correct installation Ferrule Panel that moves into groove Panel This area of material Ferrule Ferrule Panel Panel This area of material has separated from the rest of the panel Material Panel edge Mounting hole diameter 1.5 x O Min. has separated from Successful press-in installations depend on: the rest of the panel Material: The hardness of the panel material must not exceed SOUTHCO(R) recommendations. If the panel is too hard, the fastener will not install correctly. Installation Holes: Mounting holes may be drilled, punched, or cast. * Hole edge: the top hole edge must be sharp but with no broken edges. Punch side Ferrule Do not chamfer or debur edge. of panel Rollover Area of material punch and die that moves into * Punched holes: use aMaterial groove with a small clearance to minimize thickness the rollover and fracture Panel Die side angle. Mounting hole of panelthe hole * Hole diameter: measure diameter at the panel surface on Mounting hole Punch side the side on which the fastener will diameter of panel Rollover Panel edge of material bePanel installed. The diameter must be moves into Material within SOUTHCO(R) specifications for ve thickness Centerline of mounting hole that product. 1.5 x O Min. el Die side - If the hole is too large, not e of panel Before installation Correct installation Over installation enough material will flow into the Ferrule Ferrule Ferrule Mounting hole retaining groove and the fastener may not be retained adequately. Panel Panel diameter Panel - If the hole is too small, the fastener will not fit and installation may become difficult and unsafe. Centerline of mounting holefrom the edge of panel: the minimum This * Hole distance recommended area of material x O Min. separated from distance is 1.5 x the diameter of the mounting hole,has unless the rest of the panel Correct installation Over installation otherwise indicated. Punch side of panel thickness - Installing too close to the edge will cause the material to flow in the Panel opposite direction, deforming the edge of the panel. To install closer Die side Mounting hole panel to the edge, you may need to restrain the panelofedge. Over installation Ferrule Rollover Panel Centerline of mounting hole Panel Thickness: Before installation Correct installation Over installation The thickness of the panel location must meet or Ferrule Ferruleat the mounting hole Ferrule Panel Panel exceed Southco's stated minimum recommendations. If the material is too thin, panel deformation and/or damage to the fastener may result. This area of material Installation is fast and easy if you follow these tips: has separated from the rest of the panel How to install: Use the recommended force where noted and a proper back-up tool. - use any parallel-acting press - use a punch whose diameter is larger than the head of the fastener Installation Force: Proper installation requires an even distribution of adequate force. It does not depend on the distance thePunch fastener side is pressed Ferrule of panel Rollover into the panel. Area of material into - Southco doesthat notmoves recommend using a hammer. The impact Material force groove thickness does not provide an even distribution of force to allow the panel Panel Die sidegroove. material to completely flow into the fastener's retaining Mounting hole of panel - Installation force varies from application to application, depending on the criteriaholenoted above. Mounting diameter -OPanel n parts without a collar to provide a hard stop, press-in until the edge Panel edge of the knurl is just barely visible. When to Install: Centerline of mounting hole 1.5 x O Min. Installation is recommended after plating or finishing has been applied to the panel. Over installation Before installation Correct installation The hole diameter must meet Ferrule Ferrulespecifications Ferrule Panel Panel before finish or plating is applied. - Do not over-install parts. This interupts the material and will reduce the This area of material retention strength. has separated from the rest of the panel