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PartsTable / COMPONENT / C1887-632-3
C1887-632-3 ✓ 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,SHEET SPRING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SHEET SPRING, nut_width: 0.312 INCHES NOMINAL IN, nut_length: 0.359 INCHES NOMINAL IN, panel_thickness: 0.050 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN, surface_treatment: ZINC AND DICHROMATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-337-9644, 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
C1887-632-3
NSN: 5310-00-337-9644
FSC: 5310
CAGE: 78553 — TINNERMAN PALNUT ENGINEERED PRODUCTS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSHEET SPRING
nut_width0.312 INCHES NOMINAL IN
nut_length0.359 INCHES NOMINAL IN
panel_thickness0.050 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
surface_treatmentZINC AND DICHROMATE OVERALL
material_thickness0.017 INCHES NOMINAL IN
mating_member_diameter_accommodated0.138 INCHES NOMINAL IN
NSN5310-00-337-9644
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C1887-632-3 · 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
•
SURFACE TREATMENT: ZINC AND DICHROMATE OVERALL
•
MATERIAL THICKNESS: 0.017 INCHES NOMINAL IN
•
PANEL THICKNESS: 0.050 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
MATING MEMBER DIAMETER ACCOMMODATED: 0.138 INCHES NOMINAL IN
•
NUT WIDTH: 0.312 INCHES NOMINAL IN
•
NUT LENGTH: 0.359 INCHES NOMINAL IN
•
NUT STYLE: SHEET SPRING
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTZINC AND DICHROMATE OVERALL
MATERIAL THICKNESS0.017 INCHES NOMINAL IN
PANEL THICKNESS0.050 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
MATING MEMBER DIAMETER ACCOMMODATED0.138 INCHES NOMINAL IN
NUT WIDTH0.312 INCHES NOMINAL IN
NUT LENGTH0.359 INCHES NOMINAL IN
NUT STYLESHEET SPRING
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
20220-2Interchangeable
interchangeable cross-reference
interchangeable
20220-1Interchangeable
interchangeable cross-reference
interchangeable
10106058Interchangeable
interchangeable cross-reference
interchangeable
481 651Interchangeable
interchangeable cross-reference
interchangeable
AN220-1Interchangeable
interchangeable cross-reference
interchangeable
D98472-632Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C1887-632-3?
C1887-632-3 is a NUT,SHEET SPRING.
What parts can replace C1887-632-3?
There are 8 known substitutes for C1887-632-3: 20220-2, 20220-1, 10106058 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C1887-632-3?
C1887-632-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-337-9644. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026