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Fastener Head Marking
2

Fastener Head Marking

Fastener Head Marking

(OP)
Does anybody recognise the manufactures marking "LM" on the head of a fastener - image attached

RE: Fastener Head Marking

(OP)
I looked through the MIL document before I posted and the marking was not clearly identified. There is an "LM" shown for Levingstom Machine Company, Haltom City, Texas but the shape of the lettering is different.

RE: Fastener Head Marking

The marking of 3 radial lines indicates a Grade 5 bolt (SAE J429 Grade 5). Based on information I have, the "LM" mark likely belongs to a factory in China by the name of Ningbo Haixin Hardware.

RE: Fastener Head Marking

(OP)
Billybaru - Do Ningbo Haixin use a number of head-stamps? I thought their marking was "HX".

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