Tamper-Pruf Screw #10-24 x Spanner Truss Tamper Resistant Screw, 18-8 Stainless Steel, Plain Finish, 10 PK 6001040 | Zoro
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Tacoma Screw Products | 1/4"-20 x 2" Flat Head Spanner Drive Machine Screws — 18-8 Stainless Steel, Coarse, 100/PKG
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tools - What is this kind of security bolt head called, and how can I remove it? - Home Improvement Stack Exchange
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6-32 x 1/2" Spanner Security Pan Head Tamper Resistant Machine Screws 18-8 Stainless Steel Qty 25: Amazon.com: Industrial & Scientific
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