PartsTable
Technical Data Sheet
Download PDF

4001-26-0631 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4001-26-0631: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.265 INCHES NOMINAL IN, outside_diameter: 0.500 INCHES MAXIMUM IN, material_thickness: 0.018 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-328-1693, 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
4001-26-0631
NSN: 5310-01-328-1693
FSC: 5310 — Nuts and Washers
CAGE: 98291 — ITT CANNON RF PRODUCTS (USA)
SPECIFICATIONS
hole_diameter0.265 INCHES NOMINAL IN
outside_diameter0.500 INCHES MAXIMUM IN
material_thickness0.018 INCHES NOMINAL IN
NSN5310-01-328-1693
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4001-26-0631 · 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
•
OUTSIDE DIAMETER: 0.500 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.265 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.500 INCHES MAXIMUM IN
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
HOLE DIAMETER0.265 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
2098-3248-00Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
16-01592-003Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 4001-26-0631?
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 4001-26-0631?
4001-26-0631 is a WASHER,LOCK.
What parts can replace 4001-26-0631?
There are 2 known substitutes for 4001-26-0631: 2098-3248-00, 16-01592-003. Substitute compatibility should be verified for your specific system.
What is the NSN for 4001-26-0631?
4001-26-0631 is cataloged in the U.S. Government catalog under NSN 5310-01-328-1693. 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 — 4001-26-0631

✓ 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.