Crawford Products - Riveting and Fastening Systems
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Huck Fasteners - Lockbolt: C6L
Vibration-resistant C6L huck fasteners install with consistency and control. They resist loosening due to vibration and provide a high uniform clamp force. This is an excellent fastener for a wide range of structural applications.
  • Pin Dimensions
    		•
  • Collar Dimensions
    		•
  • Tensile Strength Data
    		•

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    APPLICATION INFO & PRICING

    PIN DIMENSIONS

    pin dimensions

    Maximum
    		Brazier Head (B) Truss Head (T) Flush Head (90)
    Dia. (No.) Hole Size A B C B C B C
    3/16
    		 (6) .203 .195-.191 .394-.356 .125-.113 .469-.406 .088-.078 .354-.328 .085-.075
    1/4
    		 (8) .266 .259-.254 .525-.475 .152-.136 .594-.531 .115-.103 .473-.437 .113-.101
    5/16
    		 (10) .328 .322-.317 .656-.594 .201-.181 .797-.703 .141-.127 .589-.547 .141-.127
    3/8
    		 (12) .391 .385-.380 .787-.713 .248-.223 .922-.828 .168-.152 .709-.656 .168-.152

    Material and Finish
    Material
    Finish
    Pin Carbon Steel (R) Carbon Steel—none (plain black)
      2024 Aluminum Alloy (C) 2024 Aluminum Alloy—Anodize per MIL-A-8625 or chemical surface
      6061 Aluminum Alloy (F) treatment per MIL-C-5541 (Manufacturer's option)
      CRES Steel (U) 6061 Aluminum Alloy—None
        CRES Steel—None

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    COLLAR DIMENSIONS

    collar dimensions

    Collar Part Collar F G H J K
    Type Number Diameter Diameter Diameter Length Dimension Diameter
    Standard 2LC-R, 2LC-F, 3/16 .187-.196 .311-.304 .220-.260
    LC-I, 2LC-2CU 1/4 .256-.265 .409-.402 .320-.290
    5/16 .304-.312 .494-.485 .380-.350
    3/8 .375-.385 .600-.590 .460-.430
    Flange 3LC-2R, 3LC-F, 3/16 .187-.196 .311-.304 .280-.250 .062-.031 .391-.359
    3LC-I, 3LC-2CU 1/4 .256-.267 .409-.402 .379-.349 .078-.047 .516-.484
    5/16 .304-.312 .507-.498 .426-.394 .094-.062 .641-.609
    3/8 .378-.390 .610-.599 .532-.502 .125-.062 .781-.719
    Low Profile 8LC-2R, 8LC-F, 3/16 .187-.196 .311-.304 .162-.132 .094
    8LC-I, 8LC-2CU 1/4 .256-.265 .409-.402 .202-.172 .125
    5/16 .304-.312 .494-.485 .255-.225 .125
    3/8 .375-.385 .600-.590 .295-.310 .156
     
    Note: When using 3LC collars, add "J" dimension to thickness of material being fastened to determine grip number.
    Note: When using 8LC collars, subtract "J" dimension from thickness of material being fastened to determine grip number.
    Note: Use collars and pins together as shown in "Values" tables, or contact HUCK.
     
    Material and Finish
     
    Material
    Finish
    Collar
    Low Carbon Steel (R) or (2R)
    Carbon Steel—Zinc plated, Wax Film Lubricated
    6061 Aluminum Alloy—Heat treated (F)
    Aluminum Alloy—None, Wax Film Lubricated
    6061 Aluminum Alloy (I)
    CRES Steel—None, Wax Film Lubricated
    CRES Steel (CU)
    Wax Film Lubricated

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    TENSILE STRENGTH DATA

    C6L® Installed Values 1 in Nominal Grip (lbs.)

    Pin: 6061
    Aluminum (F)    		 2024
    Aluminum (C)    		 Carbon Steel CRES (U)
    Collar: LC-I or 3LC-I 2LC-F or 3LC-F 2LC-R or 3LC-R 2LC-2CU or 3LC-2CU
    3/16 Shear 775 1050 1725 2000
    Tensile 530 1000 1650 1455
    Clamp 350 550 1025 1025
    1/4 Shear 1375 1875 3050 3550
    Tensile 975 1800 3000 3750
    Clamp 620 950 1805 1805
    5/16 Shear 2125 2925 4725 5525
    Tensile 1550 2850 4600 4250
    Clamp 965 1500 2810 2810
    3/8 Shear 3050 4200 6825 7950
    Tensile 2400 4200 6500 6100
    Clamp 1380 2200 4020 4020


    1 Minimum installed values (pounds) in nominal grip

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