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PartsTable / COMPONENT / R-863-31
R-863-31 ✓ 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,ROUND is a the manufacturer industrial component. Key specifications include nut_style: ROUND, nut_diameter: 2.719 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.563 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, drive_point_diameter: 0.188 INCHES NOMINAL 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 5310-00-710-8082, 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
R-863-31
NSN: 5310-00-710-8082
FSC: 5310
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
nut_styleROUND
nut_diameter2.719 INCHES NOMINAL IN
thread_class2B
nut_thickness0.563 INCHES NOMINAL IN
thread_directionRIGHT-HAND
drive_point_diameter0.188 INCHES NOMINAL IN
drive_point_quantity2
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-710-8082
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R-863-31 · 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
•
NUT DIAMETER: 2.719 INCHES NOMINAL IN
•
NUT STYLE: ROUND
•
NUT THICKNESS: 0.563 INCHES NOMINAL IN
•
DRIVE POINT DIAMETER: 0.188 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
DRIVE POINT QUANTITY: 2
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
NUT DIAMETER2.719 INCHES NOMINAL IN
NUT STYLEROUND
NUT THICKNESS0.563 INCHES NOMINAL IN
DRIVE POINT DIAMETER0.188 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
DRIVE POINT QUANTITY2
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
B0-18Interchangeable
interchangeable cross-reference
interchangeable
AD25BBKInterchangeable
interchangeable cross-reference
interchangeable
530-2005-006-Q70Interchangeable
interchangeable cross-reference
interchangeable
530-3005-001-Q70Interchangeable
interchangeable cross-reference
interchangeable
79C0147-00Interchangeable
interchangeable cross-reference
interchangeable
R863PC31Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R-863-31?
R-863-31 is a NUT,PLAIN,ROUND.
What parts can replace R-863-31?
There are 7 known substitutes for R-863-31: B0-18, AD25BBK, 530-2005-006-Q70 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R-863-31?
R-863-31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-710-8082. 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