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C991-440-24 — NUT,SHEET SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

C991-440-24: NUT,SHEET SPRING.

The NUT,SHEET SPRING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SHEET SPRING, nut_width: 0.250 INCHES NOMINAL IN, nut_length: 0.406 INCHES NOMINAL IN, panel_thickness: 0.093 INCHES NOMINAL IN, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-004-6945, 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
C991-440-24
NSN: 5310-01-004-6945
FSC: 5310 — Nuts and Washers
CAGE: 78553 — TINNERMAN PALNUT ENGINEERED PRODUCTS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSHEET SPRING
nut_width0.250 INCHES NOMINAL IN
nut_length0.406 INCHES NOMINAL IN
panel_thickness0.093 INCHES NOMINAL IN
surface_treatmentCADMIUM OVERALL
material_thickness0.015 INCHES NOMINAL IN
mating_member_diameter_accommodated0.112 INCHES NOMINAL IN
NSN5310-01-004-6945
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C991-440-24 · 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 WIDTH: 0.250 INCHES NOMINAL IN
•
NUT LENGTH: 0.406 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.015 INCHES NOMINAL IN
•
PANEL THICKNESS: 0.093 INCHES NOMINAL IN
•
MATING MEMBER DIAMETER ACCOMMODATED: 0.112 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NUT STYLE: SHEET SPRING
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
NUT WIDTH0.250 INCHES NOMINAL IN
NUT LENGTH0.406 INCHES NOMINAL IN
MATERIAL THICKNESS0.015 INCHES NOMINAL IN
PANEL THICKNESS0.093 INCHES NOMINAL IN
MATING MEMBER DIAMETER ACCOMMODATED0.112 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
NUT STYLESHEET SPRING
MATERIALSTEEL OVERALL
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
0590-0127Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 C991-440-24?
C991-440-24 is a NUT,SHEET SPRING.
What parts can replace C991-440-24?
There is 1 known substitute for C991-440-24: 0590-0127. Substitute compatibility should be verified for your specific system.
What is the NSN for C991-440-24?
C991-440-24 is cataloged in the U.S. Government catalog under NSN 5310-01-004-6945. 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.