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RC873A4 — Technical Data Sheet

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— · 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: LEATHER OVERALL, thickness: 0.125 INCHES NOMINAL IN, hole_diameter: 0.625 INCHES NOMINAL IN, overall_diameter: 1.188 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-753-8631, 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
RC873A4
NSN: 5310-00-753-8631
FSC: 5310
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialLEATHER OVERALL
thickness0.125 INCHES NOMINAL IN
hole_diameter0.625 INCHES NOMINAL IN
overall_diameter1.188 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-753-8631
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: RC873A4 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.125 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
MATERIAL: LEATHER OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OVERALL DIAMETER: 1.188 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.125 INCHES NOMINAL IN
HOLE DIAMETER0.625 INCHES NOMINAL IN
MATERIALLEATHER OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER1.188 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
91-3585InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
S9531-DW-MMC-010 7-16 INDEX 12InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
S9531-DW-MMC-010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7538631InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
951A4InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
873A4InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RC873A4?
RC873A4 is a WASHER,FLAT.
What parts can replace RC873A4?
There are 6 known substitutes for RC873A4: 91-3585, S9531-DW-MMC-010 7-16 INDEX 12, S9531-DW-MMC-010 and 3 more. Substitute compatibility should be verified for your specific system.
Is RC873A4 still available?
RC873A4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026