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PartsTable / COMPONENT / F99
F99 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, head_style: HEXAGON, nut_height: 0.253 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-083-2852, 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
F99
NSN: 5310-00-083-2852
FSC: 5310
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
head_styleHEXAGON
nut_height0.253 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
fastener_length1.000 INCHES NOMINAL IN
special_featuresEND APPLICATION USED ON PUMP 1-CV-7
thread_directionLEFT-HAND
width_across_flats1.123 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeFLAT
NSN5310-00-083-2852
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F99 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BEARING SURFACE TYPE: FLAT
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD QUANTITY PER INCH: 16
•
THREAD SERIES: UNF
•
NUT STYLE: HEXAGON
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
BEARING SURFACE TYPEFLAT
NOMINAL THREAD SIZE0.750 INCHES IN
SPECIAL FEATURESEND APPLICATION USED ON PUMP 1-CV-7
THREAD QUANTITY PER INCH16
THREAD SERIESUNF
NUT STYLEHEXAGON
MATERIALSTEEL CORROSION RESISTING OVERALL
THREAD CLASS2B
THREAD DIRECTIONLEFT-HAND
NUT HEIGHT0.253 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
F99Interchangeable
interchangeable cross-reference
interchangeable
13005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F99?
F99 is a NUT,PLAIN,HEXAGON.
What parts can replace F99?
There are 2 known substitutes for F99: F99, 13005. Substitute compatibility should be verified for your specific system.
What is the NSN for F99?
F99 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-083-2852. 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