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531020-1 — 531020-1

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

531020-1: 531020-1.

The 531020-1 is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OVERALL, hole_diameter: 0.330 INCHES NOMINAL IN, outside_diameter: 0.620 INCHES NOMINAL IN, style_designator: KEY, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.0625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-290-3765, 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
MRO→ MRO_GENERAL→ 531020-1
NSN: 5310-00-290-3765
NIINs: 002903765, 008718137, 013184651
FSC: 5310 — Nuts and Washers
CAGE: 95683 — GENERAL STORES SUPPLY OFFICE (USA)
SPECIFICATIONS
materialSTEEL COMP 301 OVERALL
hole_diameter0.330 INCHES NOMINAL IN
outside_diameter0.620 INCHES NOMINAL IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.0625 INCHES NOMINAL IN
external_prebent_key_width0.170 INCHES NOMINAL IN
external_prebent_key_length0.120 INCHES NOMINAL IN
overall_distance_including_keys0.800 INCHES NOMINAL IN
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.340 INCHES NOMINAL IN
NSN5310-00-290-3765
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 531020-1 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.340 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.120 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.800 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.620 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.0625 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.340 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.120 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.800 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.620 INCHES NOMINAL IN
MATERIAL THICKNESS0.0625 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
EXTERNAL PREBENT KEY WIDTH0.170 INCHES NOMINAL IN
MATERIALSTEEL COMP 301 OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
211329-11Reference document
Same NSN cross-reference
Reference document — Secondary reference
63077-5310-6Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
211329PC11Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 531020-1?
531020-1 is a 531020-1. It is classified as a MRO (MRO_GENERAL).
What parts can replace 531020-1?
There are 3 known substitutes for 531020-1: 211329-11, 63077-5310-6, 211329PC11. Substitute compatibility should be verified for your specific system.
What is the NSN for 531020-1?
531020-1 is cataloged in the U.S. Government catalog under NSN 5310-00-290-3765. 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.