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A436A4A1 — NUT,SELF-LOCKING,CAP

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A436A4A1: NUT,SELF-LOCKING,CAP.

The NUT,SELF-LOCKING,CAP is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL EXCEPT INSERT, nut_style: CAP, nut_height: 0.455 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-134-3949, 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
A436A4A1
NSN: 5310-00-134-3949
FSC: 5310 — Nuts and Washers
CAGE: A0126 — LEONARDO SPA HELICOPTERS DIVISION - PRODUCTION SITE (ITA)
SPECIFICATIONS
materialSTEEL OVERALL EXCEPT INSERT
nut_styleCAP
nut_height0.455 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats0.499 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch28
NSN5310-00-134-3949
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A436A4A1 · 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
•
WIDTH ACROSS FLATS: 0.499 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.455 INCHES NOMINAL IN
•
NUT STYLE: CAP
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.499 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.455 INCHES NOMINAL IN
NUT STYLECAP
THREAD CLASS2B
THREAD QUANTITY PER INCH28
MATERIALSTEEL OVERALL EXCEPT INSERT
SUBSTITUTES & CROSS-REFERENCES 1
90-003-4Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A436A4A1?
A436A4A1 is a NUT,SELF-LOCKING,CAP.
What parts can replace A436A4A1?
There is 1 known substitute for A436A4A1: 90-003-4. Substitute compatibility should be verified for your specific system.
What is the NSN for A436A4A1?
A436A4A1 is cataloged in the U.S. Government catalog under NSN 5310-00-134-3949. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.