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15854745 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

15854745: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.57 INCHES NOMINAL IN, outside_diameter: 3.21 INCHES NOMINAL IN, style_designator: SHOULDERED AND RECESSED, surface_treatment: ZINC OVERALL, width_between_flats: 0.39 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-721-9684, 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
15854745
NSN: 5310-01-721-9684
FSC: 5310 — Nuts and Washers
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.57 INCHES NOMINAL IN
outside_diameter3.21 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
surface_treatmentZINC OVERALL
width_between_flats0.39 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyBOLT LOWER CUSHION RETAINER
NSN5310-01-721-9684
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 15854745 · 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
•
STYLE DESIGNATOR: SHOULDERED AND RECESSED
•
OUTSIDE DIAMETER: 3.21 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.39 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.57 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSHOULDERED AND RECESSED
OUTSIDE DIAMETER3.21 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.39 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT LOWER CUSHION RETAINER
MATERIALSTEEL CORROSION RESISTING OVERALL
HOLE DIAMETER0.57 INCHES NOMINAL 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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 15854745?
15854745 is a WASHER,CONCAVE.
What is the NSN for 15854745?
15854745 is cataloged in the U.S. Government catalog under NSN 5310-01-721-9684. 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.