ASME Thread Standards

ASME thread standards context for unified inch systems and fit interpretation workflows.

ASME B1.1 — Unified Inch Screw Threads (UN and UNR)

ASME B1.1 defines the unified inch thread form and class framework for the UN series, and is referenced on BoltLab for UNC system interpretation and inch-thread engineering context.

Dataset metadata

Designation: ASME B1.1
Last reviewed: 2026-07-12

Related BoltLab concepts

UNC Thread System
Thread Pitch
Allowance

Related datasets

UNC threads
UNF threads

Current references in this family

Engineering Standards Hub