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Reference 70 (Ref 70)

The Reference 70 (Ref70) elevator bolts were originally designed for attaching stamped-steel elevator buckets and featured dimpled bolt holes to accommodate the thicker round-headed bolts. Now, with improvements in our manufacturing technology, we can manufacture elevator bolts that are equally strong but with thinner and larger-diameter heads. 

While newer-style bolts (like Norway, Fanged and Western 3-Prong), are intended for flat-back elevator buckets. The Ref70 bolt, however, is still ideal for heavy-duty industrial applications on pulleys over 20 inches in diameter when coupled with the special oval washer, a combination that creates the greatest pull-through resistence available. 

When attaching buckets to a belt, Tapco recommends always using a fanged bolt, in combination with a nylon lock nut and fender washer.

  • Imperial Sizes and Dimensions

Available in Carbon▲, Zinc, Stainless Steel✦

Size(Nominal)Inches Head Diameter Packaged-with Finished Hex NutsWeight in Pounds
Prong Length Quantity/Box Weight/Box Boxes/Full Case Weight/Full Case
1/4 - 20 x 1/2 5/8" 5/64 100 2.2 42(4200) 94
1/4 - 20 x 3/4 5/8" 5/64 100 2.5 42(4200) 106
1/4 - 20 x 1 5/8" 5/64 100 2.7 42(4200) 115
1/4 - 20 x 1-1/4 5/8" 5/64 100 3.0 42(4200) 127
1/4 - 20 x 1-1/2 5/8" 5/64 100 3.3 21(2100) 71
5/16 - 18 x 3/4 7/8" 3/32 100 4.2 21(2100) 90
5/16 - 18 x 1 7/8" 3/32 100 4.6 21(2100) 98
5/16 - 18 x 1-1/4 7/8" 3/32 100 5.0 21(2100) 106
5/16 - 18 x 1-1/2 7/8" 3/32 100 5.5 21(2100) 117
5/16 - 18 x 1-3/4 7/8" 3/32 100 5.8 21(2100) 123
5/16 - 18 x 2 7/8" 3/32 100 6.4 12(1200) 78
3/8 - 16 x 1 1" 3/32 100 3.4 21(1050) 73
3/8 - 16 x 1-1/4 1" 3/32 100 3.7 21(1050) 79
3/8 - 16 x 1-1/2 1" 3/32 100 4.0 21(1050) 85
3/8 - 16 x 1-3/4 1" 3/32 100 4.3 21(1050) 92
3/8 - 16 x 2 1" 3/32 100 4.6 21(1050) 98
3/8 - 16 x 2-1/4 1" 3/32 100 4.9 21(1050) 104
3/8 - 16 x 2-1/2 1" 3/32 100 5.3 21(1050) 113

✦ Available in 302HQ (18-8) Stainless Steel. Stainless steel bolts meet ASTM F593 alloy group 1, CW Designation (excees Grade 2 specs.)

✽ All carbon steel bolts meet SAE J429 Grade 2 Designation.

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Headquarters

Tapco, Inc
225 Rock Industrial Park Dr.
St. Louis, MO 63044
USA

Contact

Phone:  314-739-9191
Toll Free: 800-AT-TAPCO (800-288-2726)
International:  + 1-314-739-9191
Fax:  314-739-5880
E-mail:  info@tapcoinc.com

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