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Technical Data Sheet
PartsTable / COMPONENT / A309-3
A309-3 ✓ 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 material: PLASTIC ENCLOSURE, hole_type: DRILLED, head_style: HEXAGON, head_height: 0.281 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, thread_class: 2A A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-281-8280, 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
A309-3
NSN: 5306-00-281-8280
FSC: 5306
CAGE: 93343 — WHITE FARM EQUIPMENT CO SUB OF TIC INVESTMENT CORP
SPECIFICATIONS
materialPLASTIC ENCLOSURE
hole_typeDRILLED
head_styleHEXAGON
head_height0.281 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
thread_class2A A
hole_diameter0.062 INCHES NOMINAL IN
hole_quantity1
overall_width0.165 INCHES MAXIMUM IN
thread_length0.750 INCHES MINIMUM IN
overall_height0.210 INCHES MAXIMUM IN
overall_length0.210 INCHES MAXIMUM IN
NSN5306-00-281-8280
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A309-3 · 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
•
HARDNESS RATING: 26.6 ROCKWELL C MAXIMUM OVERALL
•
HOLE QUANTITY: 1
•
FEATURES PROVIDED: UNFINISHED HEAD
•
HEAD STYLE: HEXAGON
•
HEAD HEIGHT: 0.281 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.062 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.875 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING26.6 ROCKWELL C MAXIMUM OVERALL
HOLE QUANTITY1
FEATURES PROVIDEDUNFINISHED HEAD
HEAD STYLEHEXAGON
HEAD HEIGHT0.281 INCHES NOMINAL IN
HOLE DIAMETER0.062 INCHES NOMINAL IN
FASTENER LENGTH0.875 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH24
THREAD LENGTH0.750 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
A309-3Interchangeable
interchangeable cross-reference
interchangeable
MILB5687TYPE1C0MP0SITI0NAInterchangeable
interchangeable cross-reference
interchangeable
530731-001Interchangeable
interchangeable cross-reference
interchangeable
2N3704Interchangeable
interchangeable cross-reference
interchangeable
RELEASE4945Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A309-3?
A309-3 is a RELAY,ELECTROMAGNETIC.
What parts can replace A309-3?
There are 5 known substitutes for A309-3: A309-3, MILB5687TYPE1C0MP0SITI0NA, 530731-001 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A309-3?
A309-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-281-8280. 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