These are higher strenght than anything except Carrillo Carr Bolts(see chart below). Fits all 1750/2000 Carrillo rods. These are economical replacements for third world imitation Carrillo Rods. These all come with bolt inferior quality bolts. Both Carrillo CARR & WMC bolts are clearly marked on the bolt head. Cheap Chinese imitations have no marking. All imitation rods should be upgraded to either Carrillo WMC or CARR Bolts.

ROD BOLT CHART 3/8?

BOLT TYPE                   ALLOY                              RATING               COMMENTS

Carrillo CARR     Carrillo proprietary stainless      285-300,000 #     yield strength is greater

Carrillo WMC     High grade of H-11 tool steel     220-240,000 #    yield strength is greater

ARP L19            Medium grade H-11 tool steel    265/275,000#     actual yield strength range

ARP 2000          Low grade of H-11 tool steel      220/230,000#     actual yield strength range

CHINESE          Some kind of steel                        unknown            they claim to be ARP

New Carrillo Rods and Bolts are laser engraved ? Carrillo.?

Before Carrillo rods were counterfeited they were not marked.

All earlier Carrillo rod bolts have identification stamped in the head area.

ARP Bolts have stamped ID

Chinese Bolts are blank