3M 31172 Equivalent & Substitute Parts

Part Overview

The 3M 31172 is an active-status terminal connector rectangular lug designed for grounding applications in high-amperage electrical systems. This component is rated for 750MCM (kcmil) wire gauge with a 1/2 stud configuration and features a two-stud hole mounting design. The part is manufactured from copper with electro-tin contact finish and is supplied non-insulated in bulk packaging. Finding equivalent substitute parts is necessary to ensure supply chain flexibility, maintain inventory availability, and support system standardization across multiple equipment platforms.

Substiute Parts

31172

3MIn Stock: 96931172 Datasheet

Current PartRFQ

LCC750-12-6

Panduit CorpIn Stock: 903LCC750-12-6 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3M 31172 is determined by strict equivalence across the following critical parameters:

• Wire gauge rating of 750MCM (kcmil)
• Stud/tab size of 1/2 inch
• Barrel inner diameter tolerance of 1.030–1.031 inches (26.16–26.19mm)
• Barrel outer diameter tolerance of 1.299–1.300 inches (32.99–33.02mm)
• Crimp barrel termination method
• Copper contact material with electro-tin finish
• Non-insulated construction
• Free hanging in-line mounting configuration
• RoHS and REACH compliance status

The Panduit Corp LCC750-12-6 meets all substitution criteria within these defined parameters. Substitution is valid only when all electrical and mechanical parameters align within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

The Panduit Corp LCC750-12-6 is an active-status substitute for the 3M 31172 based on electrical and mechanical parameter alignment. Both parts maintain RoHS and REACH compliance status, ensuring regulatory equivalence. The critical electrical parameters—wire gauge, stud size, barrel dimensions, contact material, and termination method—are equivalent within specified tolerances.

The primary distinction is terminal style: the 3M 31172 is a rectangular lug configuration, while the Panduit LCC750-12-6 is a rectangular tongue design. This difference affects the mounting interface and physical footprint. The Panduit part exhibits slightly larger overall width (1.890" versus 1.720") and length (7.040" versus 7.000"), which may impact space constraints in confined installation environments.

Selection between these parts depends on mechanical fit requirements within the specific application assembly. Both parts are suitable for 750MCM wire termination with 1/2 stud connections where electrical performance and compliance requirements are met.

Frequently Asked Questions (FAQ)

Q: Can the Panduit LCC750-12-6 be used as a direct replacement for the 3M 31172?

A: The Panduit LCC750-12-6 is electrically equivalent for 750MCM wire termination and 1/2 stud applications. However, the terminal style differs (rectangular tongue versus rectangular lug), which affects the mounting interface. Mechanical fit must be verified for the specific application before substitution.

Q: What are the critical parameters that determine substitution eligibility?

A: Wire gauge (750MCM), stud size (1/2 inch), barrel inner and outer diameters, contact material (copper), contact finish (electro-tin), termination method (crimp barrel), and mounting type (free hanging in-line) must all match within specified tolerances.

Q: Are both parts RoHS and REACH compliant?

A: Yes. The 3M 31172 is RoHS Compliant and REACH Unaffected. The Panduit LCC750-12-6 is ROHS3 Compliant and REACH Unaffected. Both parts meet current regulatory requirements.

Q: What is the difference in physical dimensions between these parts?

A: The Panduit LCC750-12-6 is slightly longer (7.040" versus 7.000") and wider (1.890" versus 1.720") than the 3M 31172. These dimensional differences may affect fit in space-constrained installations.

Q: Do both parts use the same termination method?

A: Yes. Both the 3M 31172 and Panduit LCC750-12-6 use crimp barrel termination for 750MCM wire connections.

Q: What is the difference between a rectangular lug and a rectangular tongue terminal?

A: A rectangular lug typically features a solid connection point, while a rectangular tongue has a protruding contact element. Both are designed for stud-based connections but differ in mounting interface geometry and mechanical engagement.