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503-031 — 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 CHAIN ASSEMBLY,SINGLE LEG is a the manufacturer industrial component. Key specifications include end_item_identification: NSN 5410-01-463-2855. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-851-3214, 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
503-031
NSN: 5310-00-851-3214
FSC: 5310
CAGE: 92739 — AMPEX SYSTEMS CORP (USA)
SPECIFICATIONS
end_item_identificationNSN 5410-01-463-2855
NSN5310-00-851-3214
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 503-031 · 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
•
OUTSIDE DIAMETER: 0.375 INCHES NOMINAL IN
•
MATERIAL: CELLULOSE OVERALL
•
STYLE DESIGNATOR: SHOULDERED
•
HOLE DIAMETER: 0.195 INCHES NOMINAL IN
•
SHOULDER HEIGHT: 0.031 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.308 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
MATERIALCELLULOSE OVERALL
STYLE DESIGNATORSHOULDERED
HOLE DIAMETER0.195 INCHES NOMINAL IN
SHOULDER HEIGHT0.031 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
SHOULDER DIAMETER0.308 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
2156InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SP333JInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
111-0333-09InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
41686InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
DS-934225InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
443-1430-001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503-031?
503-031 is a CHAIN ASSEMBLY,SINGLE LEG.
What parts can replace 503-031?
There are 20 known substitutes for 503-031: 2156, SP333J, 111-0333-09 and 17 more. Substitute compatibility should be verified for your specific system.
Is 503-031 still available?
503-031 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