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1103328 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1103328: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, thickness: 0.094 INCHES NOMINAL IN, hole_diameter: 0.169 INCHES NOMINAL IN, hardness_rating: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM, overall_diameter: 0.500 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-054-5975, 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
1103328
NSN: 5310-01-054-5975
FSC: 5310 — Nuts and Washers
CAGE: 64547 — HONEYWELL INTERNATIONAL, INC DIV AEROSPACE-TUCSON (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
thickness0.094 INCHES NOMINAL IN
hole_diameter0.169 INCHES NOMINAL IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
overall_diameter0.500 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-S-18729 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationPS NO. 3 TYPE 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-054-5975
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1103328 · 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: PS NO. 3 TYPE 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.500 INCHES NOMINAL IN
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18729 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: CADMIUM OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 4130 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONPS NO. 3 TYPE 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.500 INCHES NOMINAL IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18729 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTCADMIUM OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 4130 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.169 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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1103328?
1103328 is a WASHER,FLAT.
What is the NSN for 1103328?
1103328 is cataloged in the U.S. Government catalog under NSN 5310-01-054-5975. 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.