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74A450673-2003 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

74A450673-2003: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 2.755 INCHES MINIMUM AND 2.765 INCHES MAXIMUM IN, hardness_rating: 33.0 ROCKWELL C MAXIMUM, outside_diameter: 3.180 INCHES NOMINAL IN, special_features: FOUR WIRE HOLES 0.190-32 UNF 3B, style_designator: INTERNAL PREBENT KEY. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-108-7516, 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
74A450673-2003
NSN: 5310-01-108-7516
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.755 INCHES MINIMUM AND 2.765 INCHES MAXIMUM IN
hardness_rating33.0 ROCKWELL C MAXIMUM
outside_diameter3.180 INCHES NOMINAL IN
special_featuresFOUR WIRE HOLES 0.190-32 UNF 3B
style_designatorINTERNAL PREBENT KEY
material_thickness0.187 INCHES NOMINAL IN
wire_hole_diameter0.190 INCHES NOMINAL IN
internal_prebent_key_width0.220 INCHES NOMINAL IN
material_document_and_classificationMIL-S-8844,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_key_center_to_wire_hole_center0.110 INCHES NOMINAL IN
NSN5310-01-108-7516
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 74A450673-2003 · 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
•
WIRE HOLE DIAMETER: 0.190 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY WIDTH: 0.220 INCHES NOMINAL IN
•
DISTANCE FROM KEY CENTER TO WIRE HOLE CENTER: 0.110 INCHES NOMINAL IN
•
HARDNESS RATING: 33.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: INTERNAL PREBENT KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-8844,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 3.180 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.187 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIRE HOLE DIAMETER0.190 INCHES NOMINAL IN
INTERNAL PREBENT KEY WIDTH0.220 INCHES NOMINAL IN
DISTANCE FROM KEY CENTER TO WIRE HOLE CENTER0.110 INCHES NOMINAL IN
HARDNESS RATING33.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORINTERNAL PREBENT KEY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-8844,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER3.180 INCHES NOMINAL IN
MATERIAL THICKNESS0.187 INCHES NOMINAL IN
SPECIAL FEATURESFOUR WIRE HOLES 0.190-32 UNF 3B
MATERIALSTEEL OVERALL
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 74A450673-2003?
74A450673-2003 is a WASHER,KEY.
What is the NSN for 74A450673-2003?
74A450673-2003 is cataloged in the U.S. Government catalog under NSN 5310-01-108-7516. This indicates validated use in U.S. government and defense supply chains.
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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.