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612A121P3 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

612A121P3: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN, outside_diameter: 0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: OXIDE FILM OVERALL, material_thickness: 0.026 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-724-6947, 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
612A121P3
NSN: 5310-00-724-6947
FSC: 5310 — Nuts and Washers
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter0.253 INCHES MINIMUM AND 0.258 INCHES MAXIMUM IN
outside_diameter0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentOXIDE FILM OVERALL
material_thickness0.026 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
angle_between_external_keys180.0 DEGREES NOMINAL
external_straight_key_width0.220 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
external_straight_key_length0.250 INCHES NOMINAL IN
overall_distance_including_keys1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
material_document_and_classificationAMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS 2640 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-724-6947
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 612A121P3 · 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
•
EXTERNAL STRAIGHT KEY LENGTH: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2640 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.026 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.220 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTERNAL STRAIGHT KEY LENGTH0.250 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2640 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
OVERALL DISTANCE INCLUDING KEYS1.000 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.500 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
MATERIAL THICKNESS0.026 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.220 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
COLORBLACK OVERALL
SURFACE TREATMENTOXIDE FILM OVERALL
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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 612A121P3?
612A121P3 is a WASHER,KEY.
What is the NSN for 612A121P3?
612A121P3 is cataloged in the U.S. Government catalog under NSN 5310-00-724-6947. 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.