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515678 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

515678: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, recess_angle: 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM, hole_diameter: 0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES BOTTOM, recess_diameter: 0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN, outside_diameter: 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-941-3778, 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
515678
NSN: 5310-00-941-3778
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
recess_angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
hole_diameter0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES BOTTOM
recess_diameter0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN
outside_diameter1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
material_document_and_classificationAMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-941-3778
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 515678 · 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 FINISH: 63.0 MICROINCHES BOTTOM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 410 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5613 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
MATERIAL THICKNESS0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
RECESS DIAMETER0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM IN
MATERIALSTEEL COMP 410 OVERALL
HOLE DIAMETER0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
RECESS ANGLE88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 515678?
515678 is a WASHER,RECESSED.
What is the NSN for 515678?
515678 is cataloged in the U.S. Government catalog under NSN 5310-00-941-3778. 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.