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PartsTable / COMPONENT / 16990-8F-320
16990-8F-320 ✓ 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 UNDERCUT, head_height: 0.251 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.860 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN, thread_length: 1.500 INCHES NOMINAL IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-259-2899, 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
16990-8F-320
NSN: 5305-01-259-2899
FSC: 5305
CAGE: 50392 — SPS TECHNOLOGIES INC (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK UNDERCUT
head_height0.251 INCHES NOMINAL IN
thread_class2A A
head_diameter0.860 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
thread_length1.500 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length1.749 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle82.0 DEGREES NOMINAL
width_between_flats0.312 INCHES NOMINAL IN
end_item_identification6920-01-185-9279
nominal_thread_diameter0.500 INCHES IN
NSN5305-01-259-2899
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 16990-8F-320 · 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
•
WIDTH BETWEEN FLATS: 0.312 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 20
•
SCREW MATERIAL: STEEL
•
THREAD SERIES DESIGNATOR: UNRF
•
COUNTERSINK ANGLE: 82.0 DEGREES NOMINAL
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
HEAD DIAMETER: 0.860 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS0.312 INCHES NOMINAL IN
THREAD QUANTITY PER INCH20
SCREW MATERIALSTEEL
THREAD SERIES DESIGNATORUNRF
END ITEM IDENTIFICATION6920-01-185-9279
COUNTERSINK ANGLE82.0 DEGREES NOMINAL
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD DIAMETER0.860 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN
FASTENER LENGTH1.749 INCHES NOMINAL IN
HEAD HEIGHT0.251 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
61060Interchangeable
interchangeable cross-reference
interchangeable
A-3100118-10Interchangeable
interchangeable cross-reference
interchangeable
B2-65Interchangeable
interchangeable cross-reference
interchangeable
ANSI B74.18Interchangeable
interchangeable cross-reference
interchangeable
69957399790Interchangeable
interchangeable cross-reference
interchangeable
A180MInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 16990-8F-320?
16990-8F-320 is a SCREW,MACHINE.
What parts can replace 16990-8F-320?
There are 7 known substitutes for 16990-8F-320: 61060, A-3100118-10, B2-65 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 16990-8F-320?
16990-8F-320 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-259-2899. 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