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Technical Data Sheet
PartsTable / COMPONENT / 3100-78
3100-78 ✓ Verified by PartsTable
— · BOLT SCREW
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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include duty_type: CONTINUOUS, body_width: 0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, ring_style: EXTERNAL, body_height: 0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN, body_length: 0.785 INCHES MAXIMUM IN, usage_design: EXTERNAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-804-7653, 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
3100-78
NSN: 5325-00-804-7653
FSC: 5325
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
duty_typeCONTINUOUS
body_width0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
ring_styleEXTERNAL
body_height0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
body_length0.785 INCHES MAXIMUM IN
usage_designEXTERNAL
coil_quantity11
overall_width0.400 INCHES MAXIMUM0.400 INCHES MAXIMUM IN
overall_height0.680 INCHES MAXIMUM0.680 INCHES MAXIMUM IN
overall_length1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN
inside_diameter0.712 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
major_thickness0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
NSN5325-00-804-7653
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3100-78 · 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
•
USAGE DESIGN: EXTERNAL
•
RING STYLE: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE
•
MATERIAL: STEEL COMP 1066 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1072 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OR CHROMATE ZINC
•
MATERIAL HARDNESS RATING: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
MAJOR THICKNESS: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.712 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
USAGE DESIGNEXTERNAL
RING STYLEEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE
MATERIALSTEEL COMP 1066 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1072 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090
SURFACE TREATMENTCADMIUM AND CHROMATE OR CHROMATE ZINC
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
MAJOR THICKNESS0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
INSIDE DIAMETER0.712 INCHES MINIMUM AND 0.727 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
2995323Interchangeable
interchangeable cross-reference
interchangeable
6838Interchangeable
interchangeable cross-reference
interchangeable
961963-1Interchangeable
interchangeable cross-reference
interchangeable
5K405NK218F2Interchangeable
interchangeable cross-reference
interchangeable
5K405NK214F2Interchangeable
interchangeable cross-reference
interchangeable
5K405NK214FZInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3100-78?
3100-78 is a RELAY,ELECTROMAGNETIC.
What parts can replace 3100-78?
There are 31 known substitutes for 3100-78: 2995323, 6838, 961963-1 and 28 more. Substitute compatibility should be verified for your specific system.
Is 3100-78 still available?
3100-78 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026