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Technical Data Sheet
PartsTable / COMPONENT / UL-256-1
UL-256-1 ✓ 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,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: CLINCH, nut_height: 0.096 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, temp_rating: -55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC, nut_diameter: 0.156 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-949-3858, 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
UL-256-1
NSN: 5310-00-949-3858
FSC: 5310
CAGE: 46384 — PENN ENGINEERING & MANUFACTURING CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleCLINCH
nut_height0.096 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
temp_rating-55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC
nut_diameter0.156 INCHES NOMINAL IN
pilot_length0.031 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.143 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
NSN5310-00-949-3858
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: UL-256-1 · 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
•
PILOT DIAMETER: 0.104 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD CLASS: 3B
•
PILOT LENGTH: 0.065 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 56
TECHNICAL CHARACTERISTICS (FLIS)
PILOT DIAMETER0.104 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.086 INCHES IN
MATERIALSTEEL CORROSION RESISTING OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3B
PILOT LENGTH0.065 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH56
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
LUBRICATIONDRY FILM LUBRICANT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
5914Interchangeable
interchangeable cross-reference
interchangeable
1418Interchangeable
interchangeable cross-reference
interchangeable
AGW8301Interchangeable
interchangeable cross-reference
interchangeable
UL256-1Interchangeable
interchangeable cross-reference
interchangeable
SM-A-858705-1Interchangeable
interchangeable cross-reference
interchangeable
10121870Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UL-256-1?
UL-256-1 is a NUT,SELF-LOCKING,CLINCH.
What parts can replace UL-256-1?
There are 12 known substitutes for UL-256-1: 5914, 1418, AGW8301 and 9 more. Substitute compatibility should be verified for your specific system.
Is UL-256-1 still available?
UL-256-1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026