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79 product categories
Machined Studs
Machined Bolts, Screws, and Nuts
Cold Formed Bolts, Screws, and Nuts
Hot Formed Bolts and Screws
Roll Threaded Studs, Bolts, and Screws
Hot Formed Nuts
About product categories and sources
Includes 324 product categories from the API Composite List search snapshot. Chinese labels are OFMP reading aids, not official API translations; original English names are retained for comparison. Product categories and certificates do not establish specific models, availability or delivery capability; confirm these with suppliers. Category snapshot: 2026-10-10
View the API category source