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8T1120-1 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

8T1120-1: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.188 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, overall_diameter: 0.328 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-298-4249, 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
8T1120-1
NSN: 5310-00-298-4249
FSC: 5310 — Nuts and Washers
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.188 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
overall_diameter0.328 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND W/FLATS
hole_width_across_flats0.155 INCHES MAXIMUM IN
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-298-4249
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8T1120-1 · 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
•
OVERALL DIAMETER: 0.328 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN
•
HEAT TREATMENT: AS FABRICATED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL OVERALL
•
HOLE WIDTH ACROSS FLATS: 0.155 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND W/FLATS
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.328 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN
HEAT TREATMENTAS FABRICATED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL OVERALL
HOLE WIDTH ACROSS FLATS0.155 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND W/FLATS
HOLE DIAMETER0.188 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN
THICKNESS0.062 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: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8T1120-1?
8T1120-1 is a WASHER,FLAT.
What is the NSN for 8T1120-1?
8T1120-1 is cataloged in the U.S. Government catalog under NSN 5310-00-298-4249. 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.