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S9404-20 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S9404-20: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, hole_diameter: 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN, shoulder_height: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, outside_diameter: 1.560 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 1.280 INCHES MINIMUM AND 1.290 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-007-5839, 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
S9404-20
NSN: 5310-00-007-5839
FSC: 5310 — Nuts and Washers
CAGE: 99193 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - PHOENIX (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
hole_diameter0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
shoulder_height0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
outside_diameter1.560 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter1.280 INCHES MINIMUM AND 1.290 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
material_thickness0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-225/8 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationEMS52401 TYPE;I CL B FSCM 99193 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-007-5839
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S9404-20 · 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: EMS52401 TYPE;I CL B FSCM 99193 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER HEIGHT: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.560 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 1.280 INCHES MINIMUM AND 1.290 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONEMS52401 TYPE;I CL B FSCM 99193 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SHOULDER HEIGHT0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.560 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN
MATERIAL THICKNESS0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
SHOULDER DIAMETER1.280 INCHES MINIMUM AND 1.290 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 6061 OVERALL
HOLE DIAMETER0.130 INCHES MINIMUM AND 0.140 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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S9404-20?
S9404-20 is a WASHER,SHOULDERED.
What is the NSN for S9404-20?
S9404-20 is cataloged in the U.S. Government catalog under NSN 5310-00-007-5839. 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.