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3597781 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3597781: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include nut_style: HEXAGON, nut_height: 0.188 INCHES NOMINAL IN, width_across_flats: 1.109 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN, nominal_thread_size: 0.750 INCHES IN, bearing_surface_type: FLAT, thread_quantity_per_inch: 16. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-121-4300, 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
3597781
NSN: 5310-01-121-4300
FSC: 5310 — Nuts and Washers
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
nut_styleHEXAGON
nut_height0.188 INCHES NOMINAL IN
width_across_flats1.109 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch16
NSN5310-01-121-4300
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3597781 · 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: 1.109 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NUT HEIGHT: 0.188 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
•
THREAD QUANTITY PER INCH: 16
•
BEARING SURFACE TYPE: FLAT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.109 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.750 INCHES IN
NUT HEIGHT0.188 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD QUANTITY PER INCH16
BEARING SURFACE TYPEFLAT
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 1
10109382Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3597781?
3597781 is a NUT,PLAIN,HEXAGON.
What parts can replace 3597781?
There is 1 known substitute for 3597781: 10109382. Substitute compatibility should be verified for your specific system.
What is the NSN for 3597781?
3597781 is cataloged in the U.S. Government catalog under NSN 5310-01-121-4300. 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.