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what type of bolt head is this

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Old Aug 20, 2022 | 02:24 PM
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ben442
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Joined: Feb 2010
Posts: 400
From: Ontario
what type of bolt head is this
What are these bolts called? I need to get the correct sockets.
Thanks

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Old Aug 20, 2022 | 02:31 PM
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2blu442
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Joined: Sep 2006
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From: Medford, Oregon
Its aftermarket, not sure what its called but the 12 point sockets will fit on it.
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Old Aug 20, 2022 | 02:54 PM
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oldcutlass
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From: Poteau, Ok
12 point flange head cap screw is what it's called.
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Old Aug 20, 2022 | 02:56 PM
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Fun71
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From: Phoenix, AZ
Same design as the factory nuts on Olds rod bolts.
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Old Aug 20, 2022 | 03:11 PM
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joe_padavano
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Joined: Mar 2007
Posts: 50,770
From: Northern VA
12 point heads are common on MIL-SPEC fasteners. By more evenly distributing the wrench loads around the perimeter of the head, they can be smaller and lighter with the same torque capacity.
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