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11655449 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11655449: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1141 OR STEEL COMP 1144 OVERALL, hole_diameter: 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN, heat_treatment: QUENCHED AND TEMPERED, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM, outside_diameter: 1.218 INCHES MINIMUM AND 1.228 INCHES MAXIMUM IN, style_designator: RECESSED BOTH SIDES. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-023-5886, 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
11655449
NSN: 5310-01-023-5886
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1141 OR STEEL COMP 1144 OVERALL
hole_diameter0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND TEMPERED
hardness_rating24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
outside_diameter1.218 INCHES MINIMUM AND 1.228 INCHES MAXIMUM IN
style_designatorRECESSED BOTH SIDES
top_recess_angle90.0 DEGREES NOMINAL
surface_treatmentPASSIVATE OVERALL
material_thickness0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
bottom_recess_angle90.0 DEGREES NOMINAL
material_document_and_classificationQQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-023-5886
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11655449 · 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 OVERALL
•
HEAT TREATMENT: QUENCHED AND TEMPERED
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
•
TOP RECESS ANGLE: 90.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 1.218 INCHES MINIMUM AND 1.228 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAT TREATMENTQUENCHED AND TEMPERED
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
TOP RECESS ANGLE90.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER1.218 INCHES MINIMUM AND 1.228 INCHES MAXIMUM IN
MATERIAL THICKNESS0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
SURFACE TREATMENTPASSIVATE 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 1
5310010235886Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 11655449?
11655449 is a WASHER,RECESSED.
What parts can replace 11655449?
There is 1 known substitute for 11655449: 5310010235886. Substitute compatibility should be verified for your specific system.
What is the NSN for 11655449?
11655449 is cataloged in the U.S. Government catalog under NSN 5310-01-023-5886. 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.