PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 551-90394
551-90394 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include color: BLACK OVERALL, material: STEEL OVERALL, hole_diameter: 0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, outside_diameter: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: NICKEL OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-187-7070, 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
551-90394
NSN: 5310-00-187-7070
FSC: 5310
CAGE: 90634 — GULTON INDUSTRIES INC (USA)
SPECIFICATIONS
colorBLACK OVERALL
materialSTEEL OVERALL
hole_diameter0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
outside_diameter0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentNICKEL OVERALL
material_thickness0.018 INCHES NOMINAL IN
NSN5310-00-187-7070
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 551-90394 · 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
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
•
COLOR: BLACK OVERALL
•
SURFACE TREATMENT: NICKEL OVERALL
•
HOLE DIAMETER: 0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
COLORBLACK OVERALL
SURFACE TREATMENTNICKEL OVERALL
HOLE DIAMETER0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
115543Interchangeable
interchangeable cross-reference
interchangeable
857WInterchangeable
interchangeable cross-reference
interchangeable
0912729Interchangeable
interchangeable cross-reference
interchangeable
028-04353Interchangeable
interchangeable cross-reference
interchangeable
1000-011PC21Interchangeable
interchangeable cross-reference
interchangeable
DS947032CPIECE3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 551-90394?
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 551-90394?
551-90394 is a WASHER,LOCK.
What parts can replace 551-90394?
There are 28 known substitutes for 551-90394: 115543, 857W, 0912729 and 25 more. Substitute compatibility should be verified for your specific system.
Is 551-90394 still available?
551-90394 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 551-90394

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026