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666144 — RELAY,ELECTROMAGNETIC

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

666144: RELAY,ELECTROMAGNETIC.

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: STEEL UNS K07001, ring_style: WIRE, time_delay: 0.04 SECONDS NOMINAL FIXED OPERATE TIME, usage_design: EXTERNAL, inside_diameter: 5.562 INCHES NOMINAL IN, major_thickness: 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-598-7509, 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
666144
NSN: 5325-00-598-7509
NIINs: 005987509, 016853090
FSC: 5325 — Fastening Devices
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL UNS K07001
ring_styleWIRE
time_delay0.04 SECONDS NOMINAL FIXED OPERATE TIME
usage_designEXTERNAL
coil_quantity1
inside_diameter5.562 INCHES NOMINAL IN
major_thickness0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
outside_diameter5.812 INCHES NOMINAL IN
surface_treatmentZINC
frequency_in_hertz40.0 MINIMUM AND 450.0 MAXIMUM
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating42.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
NSN5325-00-598-7509
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 666144 · OEM ⚠ 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
KEY FEATURES
•
MATERIAL HARDNESS RATING: 42.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A229 COMPOSITION A ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
•
OUTSIDE DIAMETER: 5.812 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 5.562 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING42.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A229 COMPOSITION A ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
OUTSIDE DIAMETER5.812 INCHES NOMINAL IN
MAJOR THICKNESS0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
INSIDE DIAMETER5.562 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEWIRE
SURFACE TREATMENTZINC
SUBSTITUTES & CROSS-REFERENCES 3
MIL-DTL-21248Reference document
Same NSN cross-reference
Reference document — Identification reference
MS16625C-2087Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
C93017REV2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 666144?
666144 is a RELAY,ELECTROMAGNETIC.
What parts can replace 666144?
There are 3 known substitutes for 666144: MIL-DTL-21248, MS16625C-2087, C93017REV2. Substitute compatibility should be verified for your specific system.
What is the NSN for 666144?
666144 is cataloged in the U.S. Government catalog under NSN 5325-00-598-7509. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.