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GN512GS20 — NUT,CASTELLATED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

GN512GS20: NUT,CASTELLATED.

The NUT,CASTELLATED is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5310-01-008-7232, 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
GN512GS20
NSN: 5310-01-008-7232
FSC: 5310 — Nuts and Washers
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
Part NumberGN512GS20
NSN5310-01-008-7232
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GN512GS20 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL QQ-S-764 TYPE 303,PASSIVATED QQ-P-35,5/8-18 UNJF-3B THD,1.030 IN.NUT DIA,0.891 IN. MIN 0.910 IN. MAX NUT HEIGHT,0.865 IN. MIN 0.875 IN. MAX WIDTH ACROSS TWO FLATS ON CASTELLATIONS,0.900 IN. MIN 0.910 IN. MAX COUNTERBORE DIA 0.430 IN. MIN 0.440 IN. MAX COUNTERBORE DEPTH,90 DEG COUNTERSINK ANGLE,250 DEG F TEMP RATING. IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL QQ-S-764 TYPE 303,PASSIVATED QQ-P-35,5/8-18 UNJF-3B THD,1.030 IN.NUT DIA,0.891 IN. MIN 0.910 IN. MAX NUT HEIGHT,0.865 IN. MIN 0.875 IN. MAX WIDTH ACROSS TWO FLATS ON CASTELLATIONS,0.900 IN. MIN 0.910 IN. MAX COUNTERBORE DIA 0.430 IN. MIN 0.440 IN. MAX COUNTERBORE DEPTH,90 DEG COUNTERSINK ANGLE,250 DEG F TEMP RATING. IN
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
CA27030-20Reference 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 GN512GS20?
GN512GS20 is a NUT,CASTELLATED.
What parts can replace GN512GS20?
There is 1 known substitute for GN512GS20: CA27030-20. Substitute compatibility should be verified for your specific system.
What is the NSN for GN512GS20?
GN512GS20 is cataloged in the U.S. Government catalog under NSN 5310-01-008-7232. 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.