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1591431 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1591431: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, recess_angle: 88.0 DEGREES MINIMUM AND 99.0 DEGREES MAXIMUM, hole_diameter: 0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN, heat_treatment: QUENCHED AND DRAWN, outside_diameter: 0.682 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-609-3274, 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
1591431
NSN: 5310-00-609-3274
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
recess_angle88.0 DEGREES MINIMUM AND 99.0 DEGREES MAXIMUM
hole_diameter0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND DRAWN
outside_diameter0.682 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.073 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-609-3274
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1591431 · 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
•
HEAT TREATMENT: QUENCHED AND DRAWN
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.682 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.073 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4140 OVERALL
•
HOLE DIAMETER: 0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
•
RECESS ANGLE: 88.0 DEGREES MINIMUM AND 99.0 DEGREES MAXIMUM
TECHNICAL CHARACTERISTICS
HEAT TREATMENTQUENCHED AND DRAWN
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.682 INCHES MINIMUM AND 0.687 INCHES MAXIMUM IN
MATERIAL THICKNESS0.073 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4140 OVERALL
HOLE DIAMETER0.375 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
RECESS ANGLE88.0 DEGREES MINIMUM AND 99.0 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 1591431?
1591431 is a WASHER,RECESSED.
What is the NSN for 1591431?
1591431 is cataloged in the U.S. Government catalog under NSN 5310-00-609-3274. 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.