Copperhead Climbing Nuts
Copperhead Climbing Nuts were originally developed as chocks for clean climbers, which is why I included them here. Nowadays they are primarily used as bashies for aid climbing on harder nail-ups where they are artfully pounded into thin seams to provide marginal bodyweight support. These placements cannot be trusted to hold a fall — they rarely will.

Copperhead data tables in my Forrest Mountaineering Ltd. catalogs from 1974 to 1983 list cable sizes of 3/32", 3/32", 1/8", 5/32" and 3/16" for Copperhead sizes #1 through #5, respectively. I have an earlier (undated) Forrest brochure that listed 1/16" for the #1's cable. That version was much weaker, rated at only 480 lbs (2.1 kN) under ideal laboratory conditions. The #1 (either version) and #2 Copperheads should only be trusted for direct aid.
Forrest discontinued making copperheads long ago, but Fish and others continue making them to support the demand of aid climbers. Original Forrest Copperheads are difficult to find and even more difficult to verify, as there are no distinct features that make specific brand identification practical.
↑ 414: Forrest Copperhead Climbing Nut
- Made in USA [ca. 1967].
- #1–S: 13x4 mm.
- Plated head, short version.
↑ 326: Forrest Copperhead Climbing Nut
- Made in USA [ca. 1967].
- #3: 18x9 mm.
- Plated head, standard length.
↑ 333: Forrest Copperhead Climbing Nut
- Made in USA [ca. 1967].
- #3–S: 18x9 mm.
- Bare head, short version. Originally a nut head, now primarily a bashie.
↑ 412: Forrest Copperhead Climbing Nut
- Made in USA [ca. 1967].
- #4: 22x10 mm.
- Bare head, standard length.
↑ 413: Forrest Copperhead Climbing Nut
- Made in USA [ca. 1967].
- #4–S: 22x10 mm.
- Plated head, short version.
Double Crimp
Copperhead Climbing Nuts with a Double Crimp on the loop are newer than those with a triple crimp.
↑ Set 161-163: Forrest Wired Foxheads
- Made in USA [ca. 1970].
- #1–#3
- Double crimp. Early Forrest logo.
↑ 161: Forrest Wired Foxhead
- Made in USA [ca. 1970].
- #1: 19, 24 mm.
- Double crimp. Early Forrest logo.
↑ 162: Forrest Wired Foxhead
- Made in USA [ca. 1970].
- #2: 22, 30 mm.
- Double crimp. Early Forrest logo.
↑ 163: Forrest Wired Foxhead
- Made in USA [ca. 1970].
- #3: 24, 35 mm.
- Double crimp. Early Forrest logo.
Double Crimp
Copperhead Climbing Nuts with a Double Crimp on the loop are newer than those with a triple crimp.
↑ Set 631-633: Forrest Short Wired Foxheads
- Made in USA.
- Double crimp. Early Forrest logo.
↑ 631: Forrest Short Wired Foxhead
- Made in USA [ca. 1970].
- #1–S: 19, 24 mm.
- Double crimp. Early Forrest logo.
↑ 632: Forrest Short Wired Foxhead
- Made in USA [ca. 1970].
- #2–S: 22, 30 mm.
- Double crimp. Early Forrest logo.
↑ 633: Forrest Short Wired Foxhead
- Made in USA [ca. 1970].
- #3–S: 24, 35 mm.
- Double crimp. Early Forrest logo.
Titons

1983 Forrest Mountaineering Catalog
↑ Set 122, 296, 121, 120, 324, 298: Forrest Titons
- Made in USA [ca. 1975].
- T3–T5, #6–#9
- Slotted stems.
↑ 122: Forrest Titon
- Made in USA [ca. 1973].
- T3: 18, 25 mm.
- Stainless steel.
↑ 296: Forrest Titon
- Made in USA [ca. 1975].
- T4: 22, 31 mm.
- Stainless steel.
↑ 121: Forrest Titon
- Made in USA [ca. 1973].
- T5: 25, 34 mm.
- Stainless steel.
↑ 120: Forrest Titon
- Made in USA [ca. 1973].
- #6: 31, 44 mm.
- Anodized.
↑ 297: Forrest Titon
- Made in USA [ca. 1975].
- #6: 31, 43 mm.
- Anodized.
↑ 118: Forrest Titon
- Made in USA [ca. 1973].
- #7: 37, 54 mm.
↑ 119: Forrest Titon
- Made in USA [ca. 1973].
- #7: 37, 54 mm.
- Anodized.
↑ 324: Forrest Titon
- Made in USA [ca. 1973].
- #8: 50, 70 mm.
↑ 298: Forrest Titon
- Made in USA [ca. 1975].
- #9: 63, 83 mm.
- Anodized, slotted stem.
↑ 117: Forrest Titon
- Made in USA [1980].
- #9: 50, 79 mm.
- Two drilled stem holes Smaller than slotted version.
↑ Set 109-116: Forrest Titons
- Made in USA [1980].
- #10–#17
↑ 109: Forrest Titon
- Made in USA [1980].
- #10: 50, 89 mm.
↑ 110: Forrest Titon
- Made in USA [1980].
- #11: 50, 99 mm.
↑ 111: Forrest Titon
- Made in USA [1980].
- #12: 50, 114 mm.
↑ 112: Forrest Titon
- Made in USA [1980].
- #13: 50, 126 mm.
↑ 113: Forrest Titon
- Made in USA [1980].
- #14: 50, 140 mm.
↑ 114: Forrest Titon
- Made in USA [1980].
- #15: 50, 152 mm.
↑ 115: Forrest Titon
- Made in USA [1980].
- #16: 50, 165 mm.
↑ 116: Forrest Titon
- Made in USA [1980].
- #17: 50, 177 mm.