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748900-6 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

748900-6: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include width: 0.487 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN, material: STEEL COMP 304 OVERALL, thickness: 0.029 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN, hole_diameter: 0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN, overall_diameter: 0.550 INCHES NOMINAL IN, peripheral_shape_style: DEE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-467-0258, 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
748900-6
NSN: 5310-00-467-0258
FSC: 5310 — Nuts and Washers
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
width0.487 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN
materialSTEEL COMP 304 OVERALL
thickness0.029 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN
hole_diameter0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
overall_diameter0.550 INCHES NOMINAL IN
peripheral_shape_styleDEE
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5639 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-467-0258
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 748900-6 · 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: 0.550 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5639 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: DEE
•
WIDTH: 0.487 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 304 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.550 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5513 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5639 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEDEE
WIDTH0.487 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN
MATERIALSTEEL COMP 304 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN
THICKNESS0.029 INCHES MINIMUM AND 0.030 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 748900-6?
748900-6 is a WASHER,FLAT.
What is the NSN for 748900-6?
748900-6 is cataloged in the U.S. Government catalog under NSN 5310-00-467-0258. 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.