PartsTable
Technical Data Sheet
1803-048 ✓ Verified by PartsTable
· NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OVERALL, nut_style: HEXAGON, nut_height: 0.328 INCHES MAXIMUM IN, temp_rating: 800.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-059-9265, 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
1803-048
NSN: 5310-00-059-9265
FSC: 5310
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OVERALL
nut_styleHEXAGON
nut_height0.328 INCHES MAXIMUM IN
temp_rating800.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
NSN5310-00-059-9265
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1803-048 · 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
PRECIOUS MATERIAL AND LOCATION: OVERALL SILVER
NOMINAL THREAD SIZE: 0.250 INCHES IN
COUNTERSINK ANGLE: 88.0 DEGREES NOMINAL NUT
PRECIOUS MATERIAL: SILVER
NUT STYLE: HEXAGON
WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENT: SILVER OVERALL
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
PRECIOUS MATERIAL AND LOCATIONOVERALL SILVER
NOMINAL THREAD SIZE0.250 INCHES IN
COUNTERSINK ANGLE88.0 DEGREES NOMINAL NUT
PRECIOUS MATERIALSILVER
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENTSILVER OVERALL
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NUT HEIGHT0.240 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
220415BSInterchangeable
interchangeable cross-reference
interchangeable
45812Interchangeable
interchangeable cross-reference
interchangeable
AN363C428Interchangeable
interchangeable cross-reference
interchangeable
272 458 919Interchangeable
interchangeable cross-reference
interchangeable
E25766-01Interchangeable
interchangeable cross-reference
interchangeable
GGG-K-00275Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1803-048?
1803-048 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 1803-048?
There are 19 known substitutes for 1803-048: 220415BS, 45812, AN363C428 and 16 more. Substitute compatibility should be verified for your specific system.
Is 1803-048 still available?
1803-048 is currently cancelled.
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