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J2655FBN0312S2P — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

J2655FBN0312S2P: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OR STEEL COMP 316L OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.344 INCHES NOMINAL IN, hardness_rating: 80.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM, overall_diameter: 0.625 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-463-1805, 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
J2655FBN0312S2P
NSN: 5310-01-463-1805
FSC: 5310 — Nuts and Washers
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OR STEEL COMP 316L OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.344 INCHES NOMINAL IN
hardness_rating80.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
overall_diameter0.625 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
specification/standard_data81343-SAE J2655 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationSAE J2655 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyWASHER,ROUND,FLAT
NSN5310-01-463-1805
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: J2655FBN0312S2P · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OR ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.625 INCHES NOMINAL IN
•
HARDNESS RATING: 80.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J2655 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SPECIFICATION/STANDARD DATA: 81343-SAE J2655 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OR ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.625 INCHES NOMINAL IN
HARDNESS RATING80.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J2655 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIFICATION/STANDARD DATA81343-SAE J2655 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER,ROUND,FLAT
MATERIALSTEEL COMP 316 OR STEEL COMP 316L OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
ANSI B18.22.1-1965,R1990Reference document
Same NSN cross-reference
Reference document — Secondary reference
5612494 ITEM NO. 7Same 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 J2655FBN0312S2P?
J2655FBN0312S2P is a WASHER,FLAT.
What parts can replace J2655FBN0312S2P?
There are 2 known substitutes for J2655FBN0312S2P: ANSI B18.22.1-1965,R1990, 5612494 ITEM NO. 7. Substitute compatibility should be verified for your specific system.
What is the NSN for J2655FBN0312S2P?
J2655FBN0312S2P is cataloged in the U.S. Government catalog under NSN 5310-01-463-1805. 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.