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Technical Data Sheet
PartsTable / MRO / 37178
37178 ✓ Verified by PartsTable
Legrand · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The ARRESTER,ELECTRICAL SURGE is a Legrand industrial component. Key specifications include body_width: 1.688 INCHES NOMINAL IN, body_height: 2.062 INCHES NOMINAL IN, body_length: 1.688 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, mounting_method: THREADED HOLE(S) SINGLE GROUP, special_features: 25 PIN MALE TO FEMALE PARALLEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-487-5600, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 37178
NSN: 5305-00-487-5600
FSC: 5305
CAGE: 89944 — ELBITAMERICA, INC. (USA)
SPECIFICATIONS
body_width1.688 INCHES NOMINAL IN
body_height2.062 INCHES NOMINAL IN
body_length1.688 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
mounting_methodTHREADED HOLE(S) SINGLE GROUP
special_features25 PIN MALE TO FEMALE PARALLEL
nominal_thread_size0.138 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
thread_quantity_per_inch32 SINGLE GROUP
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
mounting_facility_quantity4 SINGLE GROUP
terminal_type_and_quantity6 TAB, SOLDER LUG
NSN5305-00-487-5600
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 37178 · Legrand ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
672-0183-00Interchangeable
interchangeable cross-reference
interchangeable
37178Interchangeable
interchangeable cross-reference
interchangeable
BC3302Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 37178?
37178 is a ARRESTER,ELECTRICAL SURGE manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).
What parts can replace 37178?
There are 3 known substitutes for 37178: 672-0183-00, 37178, BC3302. Substitute compatibility should be verified for your specific system.
What is the NSN for 37178?
37178 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-487-5600. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026