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Technical Data Sheet
PartsTable / COMPONENT / 418331-3
418331-3 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.147 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, thread_length: 0.214 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, screw_material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 316, fastener_length: 0.219 INCHES MINIMUM AND 0.250 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 5305-00-455-2507, 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
418331-3
NSN: 5305-00-455-2507
FSC: 5305
CAGE: 96214 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.147 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
thread_length0.214 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
screw_materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 316
fastener_length0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.086 INCHES IN
screw_surface_treatmentPASSIVATE
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
NSN5305-00-455-2507
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 418331-3 · 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
•
NOMINAL THREAD DIAMETER: 0.086 INCHES IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,300 SERIES FED SPEC 1ST MATERIAL RESPONSE OR 66,300 SERIES FED STD 1ST MATERIAL RESPONSE OR COMP 16-18 OR 18-8 ASSN STD 2ND MATERIAL RESPONSE
•
HEAD DIAMETER: 0.147 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
•
SCREW SURFACE TREATMENT: OXIDE
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.086 INCHES IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,300 SERIES FED SPEC 1ST MATERIAL RESPONSE OR 66,300 SERIES FED STD 1ST MATERIAL RESPONSE OR COMP 16-18 OR 18-8 ASSN STD 2ND MATERIAL RESPONSE
HEAD DIAMETER0.147 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
SCREW SURFACE TREATMENTOXIDE
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 2C STYLE
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
40524002516Interchangeable
interchangeable cross-reference
interchangeable
10079716Interchangeable
interchangeable cross-reference
interchangeable
418331-3Interchangeable
interchangeable cross-reference
interchangeable
00133692NInterchangeable
Same NIIN cross-reference
interchangeable
31138800005Interchangeable
Same NIIN cross-reference
interchangeable
1786858Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 418331-3?
418331-3 is a SCREW,MACHINE.
What parts can replace 418331-3?
There are 10 known substitutes for 418331-3: 40524002516, 10079716, 418331-3 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 418331-3?
418331-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-455-2507. 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