
1-2 Introduction
Table 1-1. Series 643.6X Tension/Compression Grip Force Ratings
Model Force rating (kN) Force Rating (kip)
Static Fatigue Static Fatigue
643.64D-01 71.17 48.93 16 11
643.65D-01 146.79 97.86 33 22
643.66D-01 333.62 244.65 75 55
643.67D-01 733.96 489.30 165 110
643.68D-01 1178.78 978.61 265 220
643.69D-01 2001.70 1467.91 450 330
J (min)
K
Radius (min)
G (min)
F (max)
H (thd)
Figure 1-2. Threaded Specimen Dimensions
Table 1-2. Threaded Specimen Dimensions (SI)
Ref 643.64 643.65 643.66 643.67 643.68 643.69
F 8.89 mm 12.7 mm 20.3 mm 29.2 mm 20 mm 50.8 mm
G 41.9 mm 57.2 mm 87.6 mm 123.2 mm 170.2 mm 209.6 mm
H M12 x 1.75 mm M20 x 2.5 mm M27 x 3 mm M36 x 3 mm M52 x 3 mm M64 x 4 mm
K 6.60 mm 9.65 mm 15.24 mm 22.35 mm 59.94 38.1
L 5.08 mm 7.62 mm 10.16 15.24 mm 20.32 mm 25.4 mm
Table 1-3. Threaded Specimen Dimensions (U.S. Customary)
Ref 643.64 643.65 643.66 643.67 643.68 643.69
F 0.35 in 0.50 in 0.80 in 1.15 in 1.18 in 2.00 in
G 1.65 in 2.25 in 3.45 in 4.85 in 6.70 in 8.25 in
H 1/2-13-2A 3/4-10-2A 1-8-2A 1-1/2-8-2A 2-8-2A 2-1/2-8-2A
K 0.26 in 0.38 in 0.60 in 0.88 in 2.36 in 1.50 in
L 0.20 in 0.30 in 0.40 in 0.60 in 0.80 in 1.00 in
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