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Technical Data Sheet
PartsTable / COMPONENT / 831P
831P ✓ 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

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include general_characteristics_item_description: GUN METAL,7/8-14 UNF LEFT HAND THREADS, part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-216-7976, 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
831P
NSN: 5310-00-216-7976
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
general_characteristics_item_descriptionGUN METAL,7/8-14 UNF LEFT HAND THREADS
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-216-7976
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 831P · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: GUN METAL,7/8-14 UNF LEFT HAND THREADS
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
GENERAL CHARACTERISTICS ITEM DESCRIPTIONGUN METAL,7/8-14 UNF LEFT HAND THREADS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
F227A4061EInterchangeable
interchangeable cross-reference
interchangeable
213PInterchangeable
interchangeable cross-reference
interchangeable
831PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 831P?
831P is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace 831P?
There are 3 known substitutes for 831P: F227A4061E, 213P, 831P. Substitute compatibility should be verified for your specific system.
What is the NSN for 831P?
831P is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-216-7976. 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