C6L

The HUCK C6L™ Fastening System

C6L Fasteners install with consistency and control. They resist loosening due to vibration and provide a high uniform clamp force. An excellent fastener for a wide range of structural application.

The C6L is available in the head styles listed in the diagram below:


Pin Dimensions

Dia. (No.) Maximum Hole
Size
A Brazier Head (B)
B
C Truss Head (T)
B
C Flush Head (90)
B
C
3/16 (6) 0.203 .195 - .191 .394 - .356 .125 - .113 .469 - .406 .088 - .078 .354 - .328 .085 - .075
1/4 (8) 0.266 .259 - .254 .525 - .475 .152 - .136 .594 - .531 .115 - .103 .473 - .437 .113 - .101
5/16 (10) 0.328 .322 - .317 .656 - .594 .201 - .181 .797 - .703 .141 - .127 .589 - .547 .141 - .127
3/8 (12) 0.391 .385 - .380 .787 - .713 .248 - .223 .922 - .828 .168 - .152 .709 - .656 .168 - .152



Collar Dimensions

Collar Type Part
Number
Collar
Diameter
F
Diameter
G
Diameter
H
Length
J
Dimension
K
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


Grip Data 3/16 and 1/4 diameter

Grip No. Grip Min Range Max 6 (3/16) Dia
D±1/32
E+1/8,-0 8 (1/4) Dia
D±1/32
E+1/8,-0
2 .063 .188 .394 1.404 .485 1.520
3 .125 .250 .457 1.466 .548 1.583
4 .188 .313 .519 1.529 .610 1.645
5 .250 .375 .582 1.591 .673 1.708
6 .313 .438 .644 1.654 .735 1.770
7 .375 .500 .707 1.716 .798 1.833
8 .438 .563 .769 1.779 .860 1.895
9 .500 .625 .832 1.841 .923 1.958
10 .563 .688 .894 1.904 .985 2.020
11 .625 .750 .957 1.966 1.048 2.083
12 .688 .813 1.019 2.029 1.110 2.145
13 .750 .875 1.082 2.091 1.173 2.208
14 .813 .938 1.144 2.154 1.235 2.270
15 .875 1.000 1.207 2.216 1.298 2.333
16 .938 1.063 1.269 2.279 1.360 2.395
17 1.000 1.125 1.332 2.341 1.423 2.458
18 1.063 1.188 1.394 2.404 1.485 2.520
19 1.125 1.250 1.457 2.466 1.548 2.583
20 1.188 1.313 1.519 2.529 1.610 2.645


Grip Data 5/16 and 3/8 diameter

Grip No. Grip Min Range Max 10 (5/16) Dia
D±1/32
E+1/8,-0 12 (3/8) Dia
D±1/32
E+1/8,-0
4 .125 .375 .749 1.910 .809 2.121
6 .250 .500 .874 2.035 .934 2.246
8 .375 .625 .999 2.160 1.059 2.371
10 .500 .750 1.124 2.285 1.184 2.496
12 .625 .875 1.249 2.410 1.309 2.621
14 .750 1.000 1.374 2.535 1.434 2.746
16 .875 1.125 1.499 2.660 1.559 2.871
18 1.000 1.250 1.624 2.785 1.684 2.996
20 1.125 1.375 1.749 2.910 1.809 3.121


Installed Values1 in Nominal Grip (lbs.)

Pin:
Collar:
6061 Aluminum (F)
LC-I or 3LC-I
2024 Aluminum (C)
2LC-F or 3LC-F
Carbon Steel
2LC-R or 3LC-R
CRES (U)
2LC-2CU or 3LC-2CU
3/16 Shear 775 1050 1725 2000
Tensile 530 1000 1650 1455
Clamp 350 550 1025 1025
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


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
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


Inspection Data

Nominal Size A Max Grip B Min Grip C Min D Dia Max
3/16 .078 .125 .172 .276
1/4 .078 .156 .250 .364
5/16 .141 .219 .281 .454
3/8 .125 .281 .344 .522


Installation Tooling

Dia. Installation Tool Nose Assembly Type Use
3/16 230 99-999 Pneudraulic Maintenance & Repair
2025 99-999 Pneudraulic Maintenance & Repair
212 99-999 Pneudraulic Production
2480 99-999 Hydraulic Production
1/4 230 99-1000 Pneudraulic Maintenance & Repair
2025 99-1000 Pneudraulic Maintenance & Repair
212 99-1000 Pneudraulic Production
2480 99-1000 Hydraulic Production
5/16 246 99-99-245 Pneudraulic Production
2580 99-99-245 Hydraulic Production
3/8 246 99-100-245 Pneudrauic Production
246 99-100-245 Hydraulic Production