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218156505 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

218156505: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thickness: 0.090 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN, hole_diameter: 0.649 INCHES MINIMUM AND 0.686 INCHES MAXIMUM IN, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM, overall_diameter: 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-733-5286, 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
218156505
NSN: 5310-01-733-5286
FSC: 5310 — Nuts and Washers
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thickness0.090 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
hole_diameter0.649 INCHES MINIMUM AND 0.686 INCHES MAXIMUM IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
overall_diameter1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
specification/standard_data0U583-SAE J2655 INTERNATIONAL STD/SPEC
material_document_and_classificationQQ-N-286, GRADE 500, ANNEALED AND AGE HARDENED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyFASTENER PART STANDARD - WASHERS AND LOCKWASHERS (INCH DIMENSIONED)
NSN5310-01-733-5286
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 218156505 · 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
•
OVERALL DIAMETER: 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286, GRADE 500, ANNEALED AND AGE HARDENED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SPECIFICATION/STANDARD DATA: 0U583-SAE J2655 INTERNATIONAL STD/SPEC
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286, GRADE 500, ANNEALED AND AGE HARDENED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIFICATION/STANDARD DATA0U583-SAE J2655 INTERNATIONAL STD/SPEC
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYFASTENER PART STANDARD - WASHERS AND LOCKWASHERS (INCH DIMENSIONED)
MATERIALNICKEL ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.649 INCHES MINIMUM AND 0.686 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 4
SAE J2655Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
J2655FBN0625N5Reference document
Same NSN cross-reference
Reference document — Secondary reference
LOA006320-154Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
R4333008-154Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 218156505?
218156505 is a WASHER,FLAT.
What parts can replace 218156505?
There are 4 known substitutes for 218156505: SAE J2655, J2655FBN0625N5, LOA006320-154 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 218156505?
218156505 is cataloged in the U.S. Government catalog under NSN 5310-01-733-5286. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.