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78076C-18 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

78076C-18: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, recess_angle: 45.0 DEGREES NOMINAL, hole_diameter: 1.127 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN, hardness_rating: 34.0 ROCKWELL C MINIMUM, recess_diameter: 1.273 INCHES MINIMUM AND 1.283 INCHES MAXIMUM IN, outside_diameter: 2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-147-0324, 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
78076C-18
NSN: 5310-01-147-0324
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
recess_angle45.0 DEGREES NOMINAL
hole_diameter1.127 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN
hardness_rating34.0 ROCKWELL C MINIMUM
recess_diameter1.273 INCHES MINIMUM AND 1.283 INCHES MAXIMUM IN
outside_diameter2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentPASSIVATE OVERALL
material_thickness0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
material_document_and_classificationAMS 5663 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 TYPE I FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-147-0324
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 78076C-18 · 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 TYPE I FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5663 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
RECESS DIAMETER: 1.273 INCHES MINIMUM AND 1.283 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 TYPE I FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING34.0 ROCKWELL C MINIMUM
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5663 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.120 INCHES MINIMUM AND 2.130 INCHES MAXIMUM IN
MATERIAL THICKNESS0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
RECESS DIAMETER1.273 INCHES MINIMUM AND 1.283 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALNICKEL ALLOY 718 OVERALL
HOLE DIAMETER1.127 INCHES MINIMUM AND 1.131 INCHES MAXIMUM IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 78076C-18?
78076C-18 is a WASHER,RECESSED.
What is the NSN for 78076C-18?
78076C-18 is cataloged in the U.S. Government catalog under NSN 5310-01-147-0324. 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.