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PartsTable / COMPONENT / 16990-3F-10
16990-3F-10 ✓ 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,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.359 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN, thread_length: 0.447 INCHES NOMINAL IN, fastener_length: 0.595 INCHES MINIMUM AND 0.625 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 5305-01-349-9333, 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
16990-3F-10
NSN: 5305-01-349-9333
FSC: 5305
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.359 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN
thread_length0.447 INCHES NOMINAL IN
fastener_length0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
surface_treatmentPHOSPHATE MANGANESE AND OIL OR PHOSPHATE ZINC AND OIL OVERALL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.190 INCHES IN
NSN5305-01-349-9333
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 16990-3F-10 · 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 DIAMETER: 0.359 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN
•
COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL
•
FASTENER LENGTH: 0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL: STEEL OVERALL
•
THREAD LENGTH: 0.447 INCHES NOMINAL IN
•
SURFACE TREATMENT: PHOSPHATE MANGANESE AND OIL OR PHOSPHATE ZINC AND OIL OVERALL
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.359 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
FASTENER LENGTH0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNF
MATERIALSTEEL OVERALL
THREAD LENGTH0.447 INCHES NOMINAL IN
SURFACE TREATMENTPHOSPHATE MANGANESE AND OIL OR PHOSPHATE ZINC AND OIL OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD QUANTITY PER INCH32
HEAD STYLEFLAT COUNTERSUNK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
366-243Interchangeable
interchangeable cross-reference
interchangeable
639-16341Interchangeable
interchangeable cross-reference
interchangeable
RF61A238Interchangeable
interchangeable cross-reference
interchangeable
61006Interchangeable
interchangeable cross-reference
interchangeable
12243Interchangeable
interchangeable cross-reference
interchangeable
144122Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 16990-3F-10?
16990-3F-10 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 16990-3F-10?
There are 18 known substitutes for 16990-3F-10: 366-243, 639-16341, RF61A238 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 16990-3F-10?
16990-3F-10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-349-9333. 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