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7020-90-430-1107 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7020-90-430-1107: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, hole_diameter: 0.5645 INCHES MINIMUM AND 0.5660 INCHES MAXIMUM IN, hardness_rating: 277.0 BRINELL MINIMUM AND 352.0 BRINELL MAXIMUM, shoulder_height: 0.050 INCHES NOMINAL IN, outside_diameter: 0.940 INCHES NOMINAL IN, special_features: HOLE OFFSET 0.060 IN. FM CTR; 0.750 IN.

ACROSS TWO OPPOSITE FLATS IN. This part is cataloged in the U.S. Government catalog under NSN 5310-01-281-3405, 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
7020-90-430-1107
NSN: 5310-01-281-3405
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
hole_diameter0.5645 INCHES MINIMUM AND 0.5660 INCHES MAXIMUM IN
hardness_rating277.0 BRINELL MINIMUM AND 352.0 BRINELL MAXIMUM
shoulder_height0.050 INCHES NOMINAL IN
outside_diameter0.940 INCHES NOMINAL IN
special_featuresHOLE OFFSET 0.060 IN. FM CTR; 0.750 IN. ACROSS TWO OPPOSITE FLATS IN
style_designatorSHOULDERED
shoulder_diameter0.8015 INCHES MINIMUM AND 0.8080 INCHES MAXIMUM IN
material_thickness0.060 INCHES NOMINAL IN
material_document_and_classificationAMS 5643,COND H1150 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5622,COND H1150 ASSN STD 2ND MATERIAL RESPONSE OVERALL
NSN5310-01-281-3405
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7020-90-430-1107 · 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
•
SHOULDER HEIGHT: 0.050 INCHES NOMINAL IN
•
HARDNESS RATING: 277.0 BRINELL MINIMUM AND 352.0 BRINELL MAXIMUM
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643,COND H1150 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5622,COND H1150 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.940 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.060 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.8015 INCHES MINIMUM AND 0.8080 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SHOULDER HEIGHT0.050 INCHES NOMINAL IN
HARDNESS RATING277.0 BRINELL MINIMUM AND 352.0 BRINELL MAXIMUM
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643,COND H1150 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5622,COND H1150 ASSN STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.940 INCHES NOMINAL IN
MATERIAL THICKNESS0.060 INCHES NOMINAL IN
SHOULDER DIAMETER0.8015 INCHES MINIMUM AND 0.8080 INCHES MAXIMUM IN
SPECIAL FEATURESHOLE OFFSET 0.060 IN. FM CTR; 0.750 IN. ACROSS TWO OPPOSITE FLATS IN
MATERIALSTEEL COMP 630 OVERALL
HOLE DIAMETER0.5645 INCHES MINIMUM AND 0.5660 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7020-90-430-1107?
7020-90-430-1107 is a WASHER,SHOULDERED.
What is the NSN for 7020-90-430-1107?
7020-90-430-1107 is cataloged in the U.S. Government catalog under NSN 5310-01-281-3405. 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.