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PartsTable / COMPONENT / 547A003090
547A003090 ✓ 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,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 303SE OVERALL, nut_style: ROUND, nut_diameter: 1.187 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.250 INCHES NOMINAL IN, thread_series: UN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-103-1779, 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
547A003090
NSN: 5310-01-103-1779
FSC: 5310
CAGE: 34228 — L3 TECHNOLOGIES, INC. DIV L3 KEO (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 303SE OVERALL
nut_styleROUND
nut_diameter1.187 INCHES NOMINAL IN
thread_class3B
nut_thickness0.250 INCHES NOMINAL IN
thread_seriesUN
special_features0.089 IN. HOLE DRILLED THRU AND 4-40 UNC-3B THREAD THRU ON 0.593 IN. BOLT CIRCLE IN
thread_directionRIGHT-HAND
countersink_angle45.0 DEGREES NOMINAL BOTH ENDS
surface_treatmentPASSIVATE OVERALL
nominal_thread_size1.000 INCHES IN
counterbore_diameter1.020 INCHES NOMINAL BOTH ENDS IN
NSN5310-01-103-1779
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 547A003090 · 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
•
THREAD SERIES: UN
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NUT THICKNESS: 0.250 INCHES NOMINAL IN
•
DRIVE POINT DIAMETER: 0.125 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
COUNTERSINK ANGLE: 45.0 DEGREES NOMINAL BOTH ENDS
•
NUT STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUN
NOMINAL THREAD SIZE1.000 INCHES IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NUT THICKNESS0.250 INCHES NOMINAL IN
DRIVE POINT DIAMETER0.125 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
COUNTERSINK ANGLE45.0 DEGREES NOMINAL BOTH ENDS
NUT STYLEROUND
SPECIAL FEATURES0.089 IN. HOLE DRILLED THRU AND 4-40 UNC-3B THREAD THRU ON 0.593 IN. BOLT CIRCLE IN
COUNTERBORE DIAMETER1.020 INCHES NOMINAL BOTH ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
A149518Interchangeable
interchangeable cross-reference
interchangeable
5309Interchangeable
interchangeable cross-reference
interchangeable
900309Interchangeable
interchangeable cross-reference
interchangeable
O-C-265Interchangeable
interchangeable cross-reference
interchangeable
A-A-59282Interchangeable
interchangeable cross-reference
interchangeable
P188-500Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 547A003090?
547A003090 is a NUT,PLAIN,ROUND.
What parts can replace 547A003090?
There are 17 known substitutes for 547A003090: A149518, 5309, 900309 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 547A003090?
547A003090 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-103-1779. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026