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PartsTable / COMPONENT / 1818051-3
1818051-3 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, body_width: 0.625 INCHES MAXIMUM IN, head_style: HEXAGON, body_height: 0.281 INCHES MAXIMUM IN, body_length: 0.593 INCHES MAXIMUM IN, head_height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-068-5494, 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
1818051-3
NSN: 5306-01-068-5494
FSC: 5306
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
body_width0.625 INCHES MAXIMUM IN
head_styleHEXAGON
body_height0.281 INCHES MAXIMUM IN
body_length0.593 INCHES MAXIMUM IN
head_height0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
thread_class2A A
thread_length0.653 INCHES MINIMUM AND 0.723 INCHES MAXIMUM IN
fastener_length0.793 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
special_featuresUNDERCUT DIA BETWEEN HEAD AND THREADS 0.125 IN. WIDE BY 0.314 IN. DIA IN
style_designatorCONCENTRIC HOLE UNTHREADED
thread_directionRIGHT-HAND
NSN5306-01-068-5494
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1818051-3 · 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
•
HEAD STYLE: HEXAGON
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
WIDTH BETWEEN FLATS: 0.437 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
•
STYLE DESIGNATOR: CONCENTRIC HOLE UNTHREADED
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
WIDTH BETWEEN FLATS0.437 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
THREAD SERIES DESIGNATORUNF
CONCENTRIC HOLE DIAMETER0.218 INCHES NOMINAL IN
FASTENER LENGTH0.793 INCHES MINIMUM AND 0.833 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
1818-0513Interchangeable
interchangeable cross-reference
interchangeable
2617FMASKEDInterchangeable
interchangeable cross-reference
interchangeable
DMS 86003BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1818051-3?
1818051-3 is a MICROCIRCUIT,DIGITAL.
What parts can replace 1818051-3?
There are 3 known substitutes for 1818051-3: 1818-0513, 2617FMASKED, DMS 86003B. Substitute compatibility should be verified for your specific system.
What is the NSN for 1818051-3?
1818051-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-01-068-5494. 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