PartsTable
Technical Data Sheet
Download PDF

776928 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

776928: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 OVERALL, hole_diameter: 0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM0.260 INCHES MAXIMUM IN, outside_diameter: 0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.028 INCHES MINIMUM AND 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM0.036 INCHES MAXIMUM IN, external_key_quantity: 22. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-248-2201, 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
776928
NSN: 5310-01-248-2201
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 321 OVERALL
hole_diameter0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM0.260 INCHES MAXIMUM IN
outside_diameter0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.028 INCHES MINIMUM AND 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM0.036 INCHES MAXIMUM IN
external_key_quantity22
tapered_key_major_width0.125 INCHES MINIMUM AND 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN
angle_between_external_keys80.0 DEGREES NOMINAL80.0 DEGREES NOMINAL
overall_distance_including_keys0.570 INCHES MINIMUM AND 0.570 INCHES MINIMUM AND 0.585 INCHES MAXIMUM0.585 INCHES MAXIMUM IN
material_document_and_classificationAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-248-2201
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 776928 · 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: 0.570 INCHES MINIMUM AND 0.570 INCHES MINIMUM AND 0.585 INCHES MAXIMUM0.585 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.028 INCHES MINIMUM AND 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM0.036 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 22
•
MATERIAL: STEEL COMP 321 OVERALL
•
ANGLE BETWEEN EXTERNAL KEYS: 80.0 DEGREES NOMINAL80.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS0.570 INCHES MINIMUM AND 0.570 INCHES MINIMUM AND 0.585 INCHES MAXIMUM0.585 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN
MATERIAL THICKNESS0.028 INCHES MINIMUM AND 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM0.036 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY22
MATERIALSTEEL COMP 321 OVERALL
ANGLE BETWEEN EXTERNAL KEYS80.0 DEGREES NOMINAL80.0 DEGREES NOMINAL
TAPERED KEY MAJOR WIDTH0.125 INCHES MINIMUM AND 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN
HOLE DIAMETER0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM0.260 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: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 776928?
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 776928?
776928 is a WASHER,KEY.
What is the NSN for 776928?
776928 is cataloged in the U.S. Government catalog under NSN 5310-01-248-2201. 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 — 776928

✓ 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.