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2120560 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2120560: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.402 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN, overall_height: 0.030 INCHES NOMINAL IN, hardness_rating: 79.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM, outside_diameter: 0.507 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN, material_thickness: 0.010 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-409-2970, 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
2120560
NSN: 5310-00-409-2970
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.402 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN
overall_height0.030 INCHES NOMINAL IN
hardness_rating79.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
outside_diameter0.507 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
material_thickness0.010 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
material_document_and_classificationAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-409-2970
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2120560 · 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
•
HARDNESS RATING: 79.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.507 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.010 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.402 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.030 INCHES NOMINAL IN
HARDNESS RATING79.4 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 83.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.507 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
MATERIAL THICKNESS0.010 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.402 INCHES MINIMUM AND 0.407 INCHES MAXIMUM 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

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 2120560?
2120560 is a WASHER,SPRING TENSION.
What is the NSN for 2120560?
2120560 is cataloged in the U.S. Government catalog under NSN 5310-00-409-2970. 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.