PartsTable
Technical Data Sheet
H49508-3 ✓ 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 OVERALL, nut_style: HEXAGON, nut_height: 0.250 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), hardness_rating: 33.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-367-8585, 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
H49508-3
NSN: 5310-00-367-8585
FSC: 5310
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.250 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
hardness_rating33.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresCRITICAL FEATURES, TOLERANCES,FIT PROPERTIES,AND MANUFACTURING PROCESSES. FAILURE COULD RESULT IN LOSS OR SUBSTANTIAL DAMAGE TO WEAPONS SYSTEM,OR DEATH/SERIOUS INJURY.
thread_directionRIGHT-HAND
width_across_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_size0.190 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-00-367-8585
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H49508-3 · 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
NUT STYLE: HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: STEEL OVERALL
THREAD CLASS: 3B
THREAD QUANTITY PER INCH: 32
HARDNESS RATING: 33.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE: 0.190 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
THREAD CLASS3B
THREAD QUANTITY PER INCH32
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE0.190 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
WIDTH ACROSS FLATS0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
51107Interchangeable
interchangeable cross-reference
interchangeable
5520186Interchangeable
interchangeable cross-reference
interchangeable
4021812Interchangeable
Same NIIN cross-reference
interchangeable
5310PL0721330Interchangeable
Same NIIN cross-reference
interchangeable
4004907Interchangeable
Same NIIN cross-reference
interchangeable
4004904Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H49508-3?
H49508-3 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace H49508-3?
There are 9 known substitutes for H49508-3: 51107, 5520186, 4021812 and 6 more. Substitute compatibility should be verified for your specific system.
Is H49508-3 still available?
H49508-3 is currently cancelled.
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