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K49399-4 — NUT,PLAIN,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

K49399-4: NUT,PLAIN,PLATE.

The NUT,PLAIN,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_height: 0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), plate_thickness: 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-180-7152, 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
K49399-4
NSN: 5310-01-180-7152
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_height0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
plate_thickness0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_size0.250 INCHES IN
mounting_hole_diameter0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
nut_mounting_provisionSTRAIGHT HOLES
thread_quantity_per_inch28
mounting_hole_arrangement_style2 HOLES
material_document_and_classificationAMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-180-7152
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K49399-4 · 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
•
PLATE THICKNESS: 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MOUNTING HOLE DIAMETER: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH: 0.396 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH0.396 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.250 INCHES IN
NUT HEIGHT0.318 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
THREAD CLASS3B
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 6
9116M25P02BReference document
Same NSN cross-reference
Reference document — Drawing number reference only
9116M25P02Reference document
Same NSN cross-reference
Reference document — Secondary reference
9116M25P02AReference document
Same NSN cross-reference
Reference document — Drawing number reference only
9116M25P02EReference document
Same NSN cross-reference
Reference document — Drawing number reference only
9116M25P02DReference document
Same NSN cross-reference
Reference document — Drawing number reference only
9116M25P02CReference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 K49399-4?
K49399-4 is a NUT,PLAIN,PLATE.
What parts can replace K49399-4?
There are 6 known substitutes for K49399-4: 9116M25P02B, 9116M25P02, 9116M25P02A and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K49399-4?
K49399-4 is cataloged in the U.S. Government catalog under NSN 5310-01-180-7152. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.