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1803-126 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1803-126: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.855 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN, temp_rating: 800.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-079-3877, 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
1803-126
NSN: 5310-00-079-3877
FSC: 5310 — Nuts and Washers
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.855 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
temp_rating800.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES NOMINAL NUT
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN
NSN5310-00-079-3877
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1803-126 · 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: 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN
•
BEARING SURFACE FINISH: 125.0 MICROINCHES
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNF
•
PRECIOUS MATERIAL: SILVER
•
TEMP RATING: 800.0 FAHRENHEIT NOMINAL DEGF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN
BEARING SURFACE FINISH125.0 MICROINCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNF
PRECIOUS MATERIALSILVER
TEMP RATING800.0 FAHRENHEIT NOMINAL DEGF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.855 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
MS21046C12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1803-126?
1803-126 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 1803-126?
There is 1 known substitute for 1803-126: MS21046C12. Substitute compatibility should be verified for your specific system.
What is the NSN for 1803-126?
1803-126 is cataloged in the U.S. Government catalog under NSN 5310-00-079-3877. This indicates validated use in U.S. government and defense supply chains.
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