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753949 — NUT,SELF-LOCKING,CASTELLATED,HEX

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

753949: NUT,SELF-LOCKING,CASTELLATED,HEX.

NUT,SELF-LOCKING,CASTELLATED,HEX. Key specifications include precious_material: SILVER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-015-5728, 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
753949
NSN: 5310-01-015-5728
NIINs: 010155728, 014280985
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
special_featuresBRAND NAME DESCRIPTION I COLOR PPR IPRA.24M 50IN X100FT EI;REQUIRED MINIMUM ORDER QUANTITY 1;REQUIRED MULTIPLE ORDER QUANTITY 1 IN
precious_materialSILVER
NSN5310-01-015-5728
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 753949 · 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: 0.435 INCHES NOMINAL IN
•
THREAD SERIES: UNJS
•
HARDNESS RATING: 26.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN
•
NUT HEIGHT: 0.320 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.435 INCHES NOMINAL IN
THREAD SERIESUNJS
HARDNESS RATING26.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5020 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
NUT HEIGHT0.320 INCHES NOMINAL IN
NUT STYLECASTELLATED, HEXAGON
THREAD CLASS3B
SUBSTITUTES & CROSS-REFERENCES 3
SD.300.55135Reference document
Same NSN cross-reference
Reference document — Secondary reference
184909Reference document
Same NSN cross-reference
Reference document — Secondary reference
Z2336-048Reference 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
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FREQUENTLY ASKED QUESTIONS
What is 753949?
753949 is a NUT,SELF-LOCKING,CASTELLATED,HEX.
What parts can replace 753949?
There are 3 known substitutes for 753949: SD.300.55135, 184909, Z2336-048. Substitute compatibility should be verified for your specific system.
What is the NSN for 753949?
753949 is cataloged in the U.S. Government catalog under NSN 5310-01-015-5728. 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.