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PartsTable / COMPONENT / 818 31
818 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL ALLOY OVERALL, point_type: SPLIT, point_angle: 135.0 DEGREES NOMINAL, shank_style: STRAIGHT ROUND, flute_length: 1.625 INCHES NOMINAL IN, overall_length: 2.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-680-7848, 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
818 31
NSN: 5310-00-680-7848
FSC: 5310
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL ALLOY OVERALL
point_typeSPLIT
point_angle135.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length1.625 INCHES NOMINAL IN
flute_quantity2
overall_length2.750 INCHES NOMINAL IN
shank_diameter0.120 INCHES NOMINAL IN
special_featuresJOBBERS LG; WIRE SIZE 31
cutting_end_styleGENERAL PURPOSE
nominal_cutting_diameter0.1200 INCHES IN
cutting_rotation_directionRIGHT-HAND
NSN5310-00-680-7848
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 818 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
•
THICKNESS: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: LEAD OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.553 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALLEAD OVERALL
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.553 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
550 31Interchangeable
interchangeable cross-reference
interchangeable
2013 31Interchangeable
interchangeable cross-reference
interchangeable
17135Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 818 31?
818 31 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 818 31?
There are 3 known substitutes for 818 31: 550 31, 2013 31, 17135. Substitute compatibility should be verified for your specific system.
Is 818 31 still available?
818 31 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026