Nutshell Experts

More than 60 years ago, we began marketing and selling American Black Walnut shells in the United States. The shells make up a large percentage of the nut and serves as a very useful product for a wide range of applications. It is an excellent soft grit abrasive media used for blast cleaning and tumbling. The shell is used by the oil industry as lost circulation material and as a filter media cleaning produced water. Black Walnut is the main shell that we grind and size. We also process English and Pecan shells. Our nutshell products are sold directly to customers and through distributors worldwide.

Physical Characteristics

ColorLight Brown
Specific Gravity1.2-1.4
Hardness3 on MOHS scale
MoistureNMT 11% by weight
pH7.5
GSA SpecificationAA-1722 Type 2 (Black Walnut shell only)
Military SpecificationMIL-G-5634 Type 3

Chemical Analysis

Nitrogen0.10
Specific Cellulose40/60
Lignin20/30
Toluene Solubility0.5/1.0
Methoxyl6.5
Chlorine0.10
Ash1.5

Particle Sieve Information

Sieve SizeOpening
U.S. MeshInchesMicronsMillimeters
4.18747604.76
6.13233603.36
8.093723802.38
10.078720002.00
12.066116801.68
14.055514101.41
16.046911901.19
18.039410001.00
20.0331840.84
30.0232590.59
40.0165420.42
60.0098250.250
80.0070177.177
100.0059149.149
200.002974.074
325.001744.044

Primary Sizes

For more information, download our Safety Data Sheet.

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