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PGF5439 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

PGF5439: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 4.156 INCHES NOMINAL4.156 INCHES NOMINAL IN, outside_diameter: 5.625 INCHES MINIMUM AND 5.625 INCHES MINIMUM AND 5.750 INCHES MAXIMUM5.750 INCHES MAXIMUM IN, style_designator: KEYKEY, material_thickness: 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN, internal_key_quantity: 11. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-264-1891, 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
PGF5439
NSN: 5310-00-264-1891
FSC: 5310 — Nuts and Washers
CAGE: 77237 — DANA OFF HIGHWAY PRODUCTS, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter4.156 INCHES NOMINAL4.156 INCHES NOMINAL IN
outside_diameter5.625 INCHES MINIMUM AND 5.625 INCHES MINIMUM AND 5.750 INCHES MAXIMUM5.750 INCHES MAXIMUM IN
style_designatorKEYKEY
material_thickness0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN
internal_key_quantity11
internal_straight_key_width0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
material_document_and_classificationSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALLSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key1.953 INCHES NOMINAL1.953 INCHES NOMINAL IN
NSN5310-00-264-1891
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PGF5439 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 1.953 INCHES NOMINAL1.953 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEYKEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALLSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 5.625 INCHES MINIMUM AND 5.625 INCHES MINIMUM AND 5.750 INCHES MAXIMUM5.750 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
•
INTERNAL KEY QUANTITY: 11
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY1.953 INCHES NOMINAL1.953 INCHES NOMINAL IN
STYLE DESIGNATORKEYKEY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALLSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER5.625 INCHES MINIMUM AND 5.625 INCHES MINIMUM AND 5.750 INCHES MAXIMUM5.750 INCHES MAXIMUM IN
MATERIAL THICKNESS0.078 INCHES NOMINAL0.078 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
INTERNAL KEY QUANTITY11
HOLE DIAMETER4.156 INCHES NOMINAL4.156 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 2
PGF3676Reference document
Same NSN cross-reference
Reference document — Secondary reference
PGF5439AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PGF5439?
PGF5439 is a WASHER,KEY.
What parts can replace PGF5439?
There are 2 known substitutes for PGF5439: PGF3676, PGF5439A. Substitute compatibility should be verified for your specific system.
What is the NSN for PGF5439?
PGF5439 is cataloged in the U.S. Government catalog under NSN 5310-00-264-1891. 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.