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Heavy  Duty  C-Lock  fasteners

4000 Series

FAA  Approved for Aircraft Use Under  TSO-C-148A

  Fully Compatible and Interchangeable with Existing OEM Camloc® Parts!   
  40S5 Stud Assy
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40S5 Stud Assy with Grommet
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4000 Series Grommets
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4000 Series Receptacles
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4000 Series Fastener Installation Tools
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MilSpec 4000 Series Heavy Duty C-Lock Fasteners

 ...are the Standard in Quick Release Fastening Systems. They have a 700# working strength and 1050# Ultimate Tensile load capacity.

The studs are used in conjunction with a Grommet in the outer panel which prevents the panel hole from wearing due to vibration. This Grommet also serves as a stud retainer. The Grommets can be an extremely Low Profile (plus flush) or Countersunk, Flush Style. The Grommets come in different lengths for different panel thicknesses and the lengths are indicated by Letters stamped in the face of the part. See the chart below for Grommet Selection.

Studs also come in different Lengths and they vary by .030". The stud length is indicated by a Number stamped in the head of the stud. These fasteners are available in a variety of head styles. 4002 series slotted head C-Locks feature our special Collared Slot which prevents your screwdriver from slipping and scratching expensive paint. Phillips (cross recess) head and wing head versions are also available. All MilSpec 4000 series C-Locks have an increased shank diameter at the cross pin location for added strength and higher torque yield qualities than traditional Camloc® parts.

Two tools are required to install these fasteners. The  MS-4P3  pliers depress the stud so that it can be inserted through the grommet, and the  MS-T26  tool spreads the grommet retaining ring open so that it snaps onto the grommet easily. These tools can be found below and on our Tools Page.


 Click on desired Part Number below to add the item to your shopping cart
(quantity can be adjusted after adding item to cart).

4000 Series Stud Assy
C-Lock  -  4000 Series Studs
 

 Total Material     
 Thickness (Grip)    

Slotted Head

 Phillips Head

Total Length 
(Tol: ± .010")

Steel   Stainless     Steel   Stainless

 .021 - .050    

4002-1   4002-1S      40S5-1   40S5-1S    0.650

 .051 - .080    

4002-2   4002-2S    

 40S5-2  

40S5-2S  

 0.680

 .081 - .110    

4002-3   4002-3S    

 40S5-3  

40S5-3S  

 0.710

 .111 - .140    

4002-4   4002-4S    

 40S5-4  

40S5-4S  

 0.740

 .141 - .170    

4002-5   4002-5S    

 40S5-5  

40S5-5S  

 0.770

 .171 - .200    

4002-6   4002-6S    

 40S5-6  

40S5-6S  

 0.800

 .201 - .230    

4002-7   4002-7S    

 40S5-7  

40S5-7S  

 0.830

 .231 - .260    

4002-8   4002-8S    

 40S5-8  

40S5-8S  

 0.860

 .261 - .290    

4002-9   4002-9S    

 40S5-9  

40S5-9S  

 0.890

 .291 - .320    

4002-10 4002-10S  

 40S5-10

40S5-10S

 0.920

 .321 - .350    

4002-11 4002-11S  

 40S5-11

40S5-11S

 0.950

 .351 - .380    

4002-12 4002-12S  

 40S5-12

40S5-12S

 0.980

 .381 - .410    

4002-13 4002-13S  

 40S5-13

40S5-13S

 1.010

 .411 - .440    

4002-14 4002-14S  

 40S5-14

40S5-14S

 1.040

 .441 - .470    

4002-15 4002-15S  

 40S5-15

40S5-15S

 1.070

 .471 - .500     4002-16 4002-16S    40S5-16 40S5-16S  1.090
 .501 - .530     4002-17 4002-17S    40S5-17 40S5-17S  1.120
 .531 - .560     4002-18 4002-18S    40S5-18 40S5-18S  1.150
 .561 - .590     4002-19 4002-19S    40S5-19 40S5-19S  1.180
.591 - .620    4002-20 4002-20S    40S5-20 40S5-20S  1.210

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C-Lock  -  4000 Series Studs (Wing Head)
 

Total Material 
Thickness
(Grip)

Wing Head Studs

Total Length
(Tol: ± .010")

Steel   Stainless    
  .021 - .050   4002-1W 4002-1SW     0.650

 .051 - .080  

4002-2W   4002-2SW  

  0.680

 .081 - .110  

4002-3W   4002-3SW  

  0.710

 .111 - .140  

4002-4W   4002-4SW  

  0.740

 .141 - .170  

4002-5W   4002-5SW  

  0.770

 .171 - .200  

4002-6W   4002-6SW  

  0.800

 .201 - .230  

4002-7W   4002-7SW  

  0.830

 .231 - .260  

4002-8W   4002-8SW  

  0.860

 .261 - .290  

4002-9W   4002-9SW  

  0.890

 .291 - .320  

4002-10W 4002-10SW

  0.920

 .321 - .350  

4002-11W 4002-11SW

  0.950

 .351 - .380  

4002-12W 4002-12SW

  0.980

 .381 - .410  

4002-13W 4002-13SW

  1.010

 .411 - .440  

4002-14W 4002-14SW

  1.040

 .441 - .470  

4002-15W 4002-15SW

  1.070

 .471 - .500   4002-16W 4002-16SW   1.090
 .501 - .530   4002-17W 4002-17SW   1.120
 .531 - .560   4002-18W 4002-18SW   1.150
 .561 - .590   4002-19W 4002-19SW   1.180
 .591 - .620   4002-20W 4002-20SW   1.210

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Click for Larger Image: 4000 Series Grommets
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4000 Series Grommets
(Ring Retained)

  MilSpec 4000 Series C-Lock Grommets are used with 4000 series studs. The grommet is installed in the outer panel to prevent the panel hole from wearing and to act as a stud retainer. This grommet's length will vary depending on the outer panel's thickness. Grommets are secured in the panel with a snap ring (shown here) or by flaring. The snap ring grommets are the easiest to install, least expensive, and are reusable but, in applications subjected to severe vibration the flare type is recommended. Call for info on Flare grommets. The MS-T26 tool installs snap rings quick and easy, it can be found below and on our
Tools Page.
The MilSpec MS-O (Extended Depth) series grommets will accommodate panels up to 1/4" thick without the requirement of back counter boring the holes in order to install retaining rings. This was a big problem with the traditional Camloc® parts, but not any more. We solved the problem with less than 1 hour of R&D!
C-Lock  -  4000 Series Grommets

Grommet Part Number

Type

Material

Panel Depth Range with R4G (Regular) Snap Ring

Panel Depth Range with R4T (Thick) Snap Ring

Minimum Total Thickness 214-16 Receptacle

Minimum Total Thickness 244-16 Receptacle

MS-G
(4002-G)

Flush

Steel

up to .074

up to .058

.090

.060

MS-GS
(4002-GS)

Flush

Stainless

up to .074

up to .058

.090

.060

MS-H
(4002-H)

Flush

Steel

up to .117

up to .101

.150

.120

MS-HS
(4002-HS)

Flush

Stainless

up to .117

up to .101

.150

.120

MS-N2
(4002-N2)

Low Profile

Steel

up to .025

up to .011

.053

.023

MS-N2S
(4002-N2S)

Low Profile

Stainless

up to .025

up to .011

.053

.023

MS-N
(4002-N)

Low Profile

Steel

up to .065

up to .049

.090

.060

MS-NS
(4002-NS)

Low Profile

Stainless

up to .065

up to .049

.090

.060

MS-N3
(4002-N3)

Large Area

Steel

up to .065

up to .049

.090

.060

MS-N3S
(4002-N3S)

Large Area

Stainless

up to .065

up to .049

.090

.060

MS-N318

Large Area

Steel

.095 - .150

.079 - .130

.152

.125

MS-N318S

Large Area

Stainless

.095 - .150

.079 - .130

.152

.125

MS-O
(4002-O)

Low Profile

Steel

.066 - .094

.050 - .070

.116

.086

MS-OS
(4002-OS)

Low Profile

Stainless

.066 - .094

.050 - .070

.116

.086

MS-O18

Low Profile

Steel

.095 - .150

.079 - .130

.152

.125

MS-O18S

Low Profile

Stainless

.095 - .150

.079 - .130

.152

.125

MS-O316

Low Profile

Steel

.151 - .220

.131 - .200

.200

.187

MS-O316S

Low Profile

Stainless

.151 - .220

.131 - .200

.200

.187

MS-O14

Low Profile

Steel

.221 - .280

.201 - .260

.270

.250

MS-O14S

Low Profile

Stainless

.221 - .280

.201 - .260

.270

.250 

MS-O38S Low Profile Stainless .350 - .400 .340 - .390 0.343 .375
MS-O58S Low Profile Stainless .570 - .635 .558 - .620 0.593 .625
MS-1116S Low Profile Stainless .660 - .700 .621 - .683 0.656 .687

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The MS245 Adjustable Receptacle makes the
4000 Series
C-Lock fasteners more versatile than ever!

Click for Larger Image: MS245
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MS245(Exploded View)

 

  • Any one stud length fits a wide range of panels.

  • The MS245 is an exact replacement for 244-16 Floating Receptacles.

  • Lighter than 214-16 Rigid and 244-16 Floating, fixed depth receptacles with the same tensile strength ratings.

  • Economically beneficial by cutting inventory costs. Simply
    keep one stud length and one receptacle in stock for all applications.

  • Fully compatible with existing C-Lock (or Camloc®) designs.

  • FAA approved for aircraft use under TSO-C-148.

  •  MS245 Installation Instructions and Engineering Data (.pdf)

 

C-Lock  -  Receptacles and Grommet Retainers

Part Number

Description

For