Fastener categories: Taper pins, straight pins, dowel pins, clevis pins, and cotter pins are collectively classified as which group of mechanical elements?

Introduction / Context:
Mechanical drawings often specify small locating or retaining elements used to align parts, transmit shear, or provide quick-release connections. Grouping them correctly helps with part selection and procurement.

Given Data / Assumptions:

• We are given examples: taper, straight, dowel, clevis, and cotter pins.
• We must select the correct umbrella category.
• Standard mechanical hardware nomenclature applies.

Concept / Approach:

All listed components are types of machine pins. They can be press-fit (dowels), used as alignment features, or act as retaining/hinge elements (clevis, cotter) in mechanical assemblies.

Step-by-Step Solution:

Verification / Alternative check:

Catalogs and standards list these under pins, not under bolts or rivets. Drawings show them with specific fits and tolerances.

Why Other Options Are Wrong:

Bolts: threaded and used with nuts or tapped holes.

General fasteners: overly generic and not a specific category.

Rivets: permanent fastening by upsetting, unlike removable/locating pins.

Common Pitfalls:

Assuming anything that joins parts is a “fastener” without recognizing subcategories that affect installation and tolerances.

Final Answer:

Machine pins