Howmet Fastening Systems
Howmet Fastening Systems
Phone: Sales +1 800 992 4444
Technical Support +1 310 784 6409
Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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THREAD: AS8879
MATERIAL:
  • Nut and Housing - Carbon steel, heat treated.
  • Retainer

    • F1968-(*) 7075-T6- Aluminum alloy.
    F1968-(*)H, F1968-(*)L and F1968X(*)L - Carbon steel.
  • Seal
    F1968-(*) and F1968X(*) - Rubber per MIL-R-6855, Class I, grade 60, color black.
    F1968-(*)H - Silicon rubber, shore A55-65, color red.
    F1968-(*)L and F1968X(*)L - Fluorosilicone rubber per AMS 3325 or MIL-R-25988, Type II, Class 1, Durometer A70, color blue.
FINISH:
  • Nut
    • F1968-(*), F1968-(*)H and F1968-(*)L - Cadmium plate per AMS-QQ-P-416, Type II, Class 2 plus Kaylube molybdenum disulfide dry film lubricant coat per AS5272.
    • F1968X(*) and F1968X(*)L - Cadmium plated per fed. spec. AMS-QQ-P-416, Type II, Class 2.
  • Housing - Cadmium plate per fed. spec. AMS-QQ-P-416, Type II, Class 2.
  • Retainer
    • F1968-(*) - Anodize coating per MIL-C-5541.
    • F1968-(*)H, F1968-(*)L and F1968X(*)L - Cadmium plate per AMS-QQ-P-416, Type II Class 2.
  • Seal - None
PERFORMANCE: NASM25027.
FLOATABILITY: .020 min. radially from center.
PRESSURE RANGE: Up to 50 PSI (static differential pressure).
TEMPERATURE:
  • F1968-(*) and F1968X(*) -65°F to +225°F
  • F1968-(*)H -65°F to +450°F
  • F1968-(*)L and F1968X(*)L -65°F to +300°F
F1968 Anchor Nut - Two-Lug, Floating, Self Sealing
Unit of Measure
1 

Item #

A - MAX

C

D - MIN

F - REF

G - MAX

H - MAX

J

K

V - REF

W - MAX

X - MAX

Approx. Weight (LBS/100)

Thread

F1968-420 N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-20 UNJC-3B
F1968-5 N/A 1.290 N/A 0.505-0.495 N/A 0.352 N/A 0.455 N/A 0.410 N/A 0.790 N/A 1.002-0.998 N/A 0.135-0.130 N/A 0.020 N/A 0.762 N/A 0.728 N/A 1.810 N/A 0.3125-24 UNJF-3B
F1968-6 N/A 1.415 N/A 0.567-0.557 N/A 0.415 N/A 0.545 N/A 0.470 N/A 0.920 N/A 1.127-1.123 N/A 0.135-0.130 N/A 0.025 N/A 0.890 N/A 0.850 N/A 2.080 N/A 0.3750-24 UNJF-3B
F1968-7 N/A 1.650 N/A 0.630-0.620 N/A 0.477 N/A 0.765 N/A 0.520 N/A 1.100 N/A 1.252-1.248 N/A 0.135-0.130 N/A 0.030 N/A 1.250 N/A 0.800 N/A 3.400 N/A 0.4375-20 UNJF-3B
F1968-420H N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-20 UNJC-3B
F1968-7H N/A 1.650 N/A 0.630-0.620 N/A 0.477 N/A 0.765 N/A 0.520 N/A 1.100 N/A 1.252-1.248 N/A 0.135-0.130 N/A 0.030 N/A 1.250 N/A 0.800 N/A 3.400 N/A 0.4375-20 UNJF-3B
F1968-08L N/A 0.968 N/A 0.349-0.339 N/A 0.230 N/A 0.310 N/A 0.313 N/A 0.625 N/A 0.690-0.686 N/A 0.103-0.098 N/A 0.020 N/A 0.528 N/A 0.563 N/A 0.760 N/A 0.1540-32 UNJC-3B
F1968-3L N/A 0.968 N/A 0.349-0.339 N/A 0.230 N/A 0.310 N/A 0.313 N/A 0.625 N/A 0.690-0.686 N/A 0.103-0.098 N/A 0.020 N/A 0.528 N/A 0.568 N/A 0.760 N/A 0.1900-32 UNJF-3B
F1968-4L N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-28 UNJF-3B
F1968-420L N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-20 UNJC-3B
F1968-5L N/A 1.290 N/A 0.505-0.495 N/A 0.352 N/A 0.455 N/A 0.410 N/A 0.790 N/A 1.002-0.998 N/A 0.135-0.130 N/A 0.020 N/A 0.762 N/A 0.728 N/A 1.810 N/A 0.3125-24 UNJF-3B
F1968-6L N/A 1.415 N/A 0.567-0.557 N/A 0.415 N/A 0.545 N/A 0.470 N/A 0.920 N/A 1.127-1.123 N/A 0.135-0.130 N/A 0.025 N/A 0.890 N/A 0.850 N/A 2.080 N/A 0.3750-24 UNJF-3B
F1968-7L N/A 1.650 N/A 0.630-0.620 N/A 0.477 N/A 0.765 N/A 0.520 N/A 1.100 N/A 1.252-1.248 N/A 0.135-0.130 N/A 0.030 N/A 1.250 N/A 0.800 N/A 3.400 N/A 0.4375-20 UNJF-3B
F1968-8L N/A 1.650 N/A 0.630-0.620 N/A 0.540 N/A 0.765 N/A 0.570 N/A 1.100 N/A 1.252-1.248 N/A 0.166-0.161 N/A 0.030 N/A 1.250 N/A 0.800 N/A 4.630 N/A 0.5000-20 UNJF-3B
F1968X420 N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-20 UNJC-3B
F1968X5 N/A 1.290 N/A 0.505-0.495 N/A 0.352 N/A 0.455 N/A 0.410 N/A 0.790 N/A 1.002-0.998 N/A 0.135-0.130 N/A 0.020 N/A 0.762 N/A 0.728 N/A 1.810 N/A 0.3125-24 UNJF-3B
F1968X6 N/A 1.415 N/A 0.567-0.557 N/A 0.415 N/A 0.545 N/A 0.470 N/A 0.920 N/A 1.127-1.123 N/A 0.135-0.130 N/A 0.025 N/A 0.890 N/A 0.850 N/A 2.080 N/A 0.3750-24 UNJF-3B
F1968X7 N/A 1.650 N/A 0.630-0.620 N/A 0.477 N/A 0.765 N/A 0.520 N/A 1.100 N/A 1.252-1.248 N/A 0.135-0.130 N/A 0.030 N/A 1.250 N/A 0.800 N/A 3.400 N/A 0.4375-20 UNJF-3B
F1968X8 N/A 1.650 N/A 0.630-0.620 N/A 0.540 N/A 0.765 N/A 0.570 N/A 1.100 N/A 1.252-1.248 N/A 0.166-0.161 N/A 0.030 N/A 1.250 N/A 0.800 N/A 4.630 N/A 0.5000-20 UNJF-3B
F1968X08L N/A 0.968 N/A 0.349-0.339 N/A 0.230 N/A 0.310 N/A 0.313 N/A 0.625 N/A 0.690-0.686 N/A 0.103-0.098 N/A 0.020 N/A 0.528 N/A 0.563 N/A 0.760 N/A 0.1540-32 UNJC-3B
F1968X3L N/A 0.968 N/A 0.349-0.339 N/A 0.230 N/A 0.310 N/A 0.313 N/A 0.625 N/A 0.690-0.686 N/A 0.103-0.098 N/A 0.020 N/A 0.528 N/A 0.568 N/A 0.760 N/A 0.1900-32 UNJF-3B
F1968X4L N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-28 UNJF-3B
F1968X420L N/A 1.260 N/A 0.505-0.495 N/A 0.290 N/A 0.380 N/A 0.372 N/A 0.750 N/A 1.002-0.998 N/A 0.103-0.096 N/A 0.020 N/A 0.650 N/A 0.687 N/A 1.300 N/A 0.2500-20 UNJC-3B
F1968X5L N/A 1.290 N/A 0.505-0.495 N/A 0.352 N/A 0.455 N/A 0.410 N/A 0.790 N/A 1.002-0.998 N/A 0.135-0.130 N/A 0.020 N/A 0.762 N/A 0.728 N/A 1.810 N/A 0.3125-24 UNJF-3B
F1968X6L N/A 1.415 N/A 0.567-0.557 N/A 0.415 N/A 0.545 N/A 0.470 N/A 0.920 N/A 1.127-1.123 N/A 0.135-0.130 N/A 0.025 N/A 0.890 N/A 0.850 N/A 2.080 N/A 0.3750-24 UNJF-3B
F1968X7L N/A 1.650 N/A 0.630-0.620 N/A 0.477 N/A 0.765 N/A 0.520 N/A 1.100 N/A 1.252-1.248 N/A 0.135-0.130 N/A 0.030 N/A 1.250 N/A 0.800 N/A 3.400 N/A 0.4375-20 UNJF-3B
F1968X8L N/A 1.650 N/A 0.630-0.620 N/A 0.540 N/A 0.765 N/A 0.570 N/A 1.100 N/A 1.252-1.248 N/A 0.166-0.161 N/A 0.030 N/A 1.250 N/A 0.800 N/A 4.630 N/A 0.5000-20 UNJF-3B
Unit of Measure
1