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368508 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

368508: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OR STEEL COMP 303S OR STEEL COMP 303SE OVERALL, nut_style: HEXAGON, nut_height: 0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-176-8121, 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
368508
NSN: 5310-00-176-8121
FSC: 5310 — Nuts and Washers
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OR STEEL COMP 303S OR STEEL COMP 303SE OVERALL
nut_styleHEXAGON
nut_height0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
countersink_angle110.0 DEGREES NOMINAL NUT
surface_treatmentPASSIVATE OVERALL
width_across_flats0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch28
NSN5310-00-176-8121
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 368508 · 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
•
WIDTH ACROSS FLATS: 0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7720 COMP FM MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-7720 COMP FM MIL SPEC 3RD MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT HEIGHT: 0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
COUNTERSINK ANGLE: 110.0 DEGREES NOMINAL NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.423 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7720 COMP FM MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-7720 COMP FM MIL SPEC 3RD MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT HEIGHT0.178 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
COUNTERSINK ANGLE110.0 DEGREES NOMINAL NUT
NUT STYLEHEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 6
HT426Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN345C416Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
6L3504-28Reference document
Same NSN cross-reference
Reference document — Secondary reference
92211160000Reference document
Same NSN cross-reference
Reference document — Secondary reference
100-16SSReference document
Same NSN cross-reference
Reference document — Secondary reference
945011-214Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 368508?
368508 is a NUT,PLAIN,HEXAGON.
What parts can replace 368508?
There are 6 known substitutes for 368508: HT426, AN345C416, 6L3504-28 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 368508?
368508 is cataloged in the U.S. Government catalog under NSN 5310-00-176-8121. This indicates validated use in U.S. government and defense supply chains.
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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.