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P1399 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

P1399: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL, hole_diameter: 5.281 INCHES NOMINAL IN, outside_diameter: 5.687 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.0548 INCHES MINIMUM AND 0.0648 INCHES MAXIMUM IN, external_straight_key_width: 0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-522-3047, 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
P1399
NSN: 5310-00-522-3047
FSC: 5310 — Nuts and Washers
CAGE: 80212 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
materialSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
hole_diameter5.281 INCHES NOMINAL IN
outside_diameter5.687 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.0548 INCHES MINIMUM AND 0.0648 INCHES MAXIMUM IN
external_key_quantity9
external_straight_key_width0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
overall_distance_including_keys6.057 INCHES MINIMUM AND 6.067 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-522-3047
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: P1399 · 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 DISTANCE INCLUDING KEYS: 6.057 INCHES MINIMUM AND 6.067 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 5.687 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.0548 INCHES MINIMUM AND 0.0648 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 9
•
MATERIAL: STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS6.057 INCHES MINIMUM AND 6.067 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER5.687 INCHES NOMINAL IN
MATERIAL THICKNESS0.0548 INCHES MINIMUM AND 0.0648 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY9
MATERIALSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL
HOLE DIAMETER5.281 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is P1399?
P1399 is a WASHER,KEY.
What is the NSN for P1399?
P1399 is cataloged in the U.S. Government catalog under NSN 5310-00-522-3047. 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.