PartsTable
Technical Data Sheet
Download PDF

14-40129-1 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

14-40129-1: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4340 OVERALL, hole_diameter: 0.258 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN, outside_diameter: 0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN, style_designator: SERRATED, material_thickness: 0.100 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-098-2780, 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
14-40129-1
NSN: 5310-00-098-2780
FSC: 5310 — Nuts and Washers
CAGE: 79U29 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
hole_diameter0.258 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
outside_diameter0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
special_featuresSTYLE VARIES-NO SPLIT IN WASHER/ HEAT TREAT TO 160,000-180,000 PSI PER HT-21/SERRATIONS PER 85Z100-16/ MAGNETIC PARTICLE INSPECT PER PS IT-61/DIA AFTER PLATING 0.439-0.444
style_designatorSERRATED
material_thickness0.100 INCHES NOMINAL IN
NSN5310-00-098-2780
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 14-40129-1 · 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
•
STYLE DESIGNATOR: SERRATED
•
OUTSIDE DIAMETER: 0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.100 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4340 OVERALL
•
HOLE DIAMETER: 0.258 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSERRATED
OUTSIDE DIAMETER0.438 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
MATERIAL THICKNESS0.100 INCHES NOMINAL IN
SPECIAL FEATURESSTYLE VARIES-NO SPLIT IN WASHER/ HEAT TREAT TO 160,000-180,000 PSI PER HT-21/SERRATIONS PER 85Z100-16/ MAGNETIC PARTICLE INSPECT PER PS IT-61/DIA AFTER PLATING 0.439-0.444
MATERIALSTEEL COMP 4340 OVERALL
HOLE DIAMETER0.258 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
4-40129-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy 14-40129-1?
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 14-40129-1?
14-40129-1 is a WASHER,LOCK.
What parts can replace 14-40129-1?
There is 1 known substitute for 14-40129-1: 4-40129-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 14-40129-1?
14-40129-1 is cataloged in the U.S. Government catalog under NSN 5310-00-098-2780. 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 — 14-40129-1

✓ 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.