PartsTable
Technical Data Sheet
Download PDF

S10-10-5378 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S10-10-5378: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 0.640 INCHES NOMINAL IN, outside_diameter: 0.750 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.035 INCHES NOMINAL IN, peening_key_length: 0.281 INCHES NOMINAL IN, external_straight_key_width: 0.218 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-032-6985, 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
S10-10-5378
NSN: 5310-00-032-6985
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
hole_diameter0.640 INCHES NOMINAL IN
outside_diameter0.750 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.035 INCHES NOMINAL IN
peening_key_length0.281 INCHES NOMINAL IN
external_key_quantity5
external_straight_key_width0.218 INCHES MAXIMUM IN
external_straight_key_length0.281 INCHES NOMINAL IN
overall_distance_including_keys1.312 INCHES NOMINAL IN
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-032-6985
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S10-10-5378 · 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
•
EXTERNAL STRAIGHT KEY LENGTH: 0.281 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.750 INCHES NOMINAL IN
•
PEENING KEY LENGTH: 0.281 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.035 INCHES NOMINAL IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.218 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTERNAL STRAIGHT KEY LENGTH0.281 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS1.312 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
PEENING KEY LENGTH0.281 INCHES NOMINAL IN
MATERIAL THICKNESS0.035 INCHES NOMINAL IN
EXTERNAL STRAIGHT KEY WIDTH0.218 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY5
HOLE DIAMETER0.640 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: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy S10-10-5378?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is S10-10-5378?
S10-10-5378 is a WASHER,KEY.
What is the NSN for S10-10-5378?
S10-10-5378 is cataloged in the U.S. Government catalog under NSN 5310-00-032-6985. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — S10-10-5378

✓ 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.