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621-7520-001 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

621-7520-001: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 260 OR COPPER ALLOY 270 OR COPPER ALLOY 272 OR COPPER ALLOY 330 OR COPPER ALLOY 332 OVERALL, nut_style: ROUND, nut_diameter: 0.500 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.125 INCHES NOMINAL IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-012-5164, 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
621-7520-001
NSN: 5310-01-012-5164
FSC: 5310 — Nuts and Washers
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialCOPPER ALLOY 260 OR COPPER ALLOY 270 OR COPPER ALLOY 272 OR COPPER ALLOY 330 OR COPPER ALLOY 332 OVERALL
nut_styleROUND
nut_diameter0.500 INCHES NOMINAL IN
thread_class2B
nut_thickness0.125 INCHES NOMINAL IN
thread_seriesUNF
thread_directionRIGHT-HAND
drive_point_depth0.050 INCHES NOMINAL IN
drive_point_width0.093 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
drive_point_quantity2
thread_quantity_per_inch24
NSN5310-01-012-5164
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 621-7520-001 · 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
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B135 TEMPER HARD ASSN STD ALL MATERIAL RESPONSES OVERALL
•
DRIVE POINT WIDTH: 0.093 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
NUT DIAMETER: 0.500 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.050 INCHES NOMINAL IN
•
NUT THICKNESS: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B135 TEMPER HARD ASSN STD ALL MATERIAL RESPONSES OVERALL
DRIVE POINT WIDTH0.093 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT DIAMETER0.500 INCHES NOMINAL IN
DRIVE POINT DEPTH0.050 INCHES NOMINAL IN
NUT THICKNESS0.125 INCHES NOMINAL IN
DRIVE POINT QUANTITY2
NUT STYLEROUND
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

No substitute or cross-reference records for this part.

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 621-7520-001?
621-7520-001 is a NUT,PLAIN,ROUND.
What is the NSN for 621-7520-001?
621-7520-001 is cataloged in the U.S. Government catalog under NSN 5310-01-012-5164. 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.