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21D1043 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

21D1043: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN, hardness_rating: 62.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM, outside_diameter: 0.628 INCHES NOMINAL IN, material_thickness: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, overall_distance_including_keys: 0.736 INCHES NOMINAL IN, material_document_and_classification: 44S100 MFR REF ALL MATERIAL RESPONSES OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-033-1193, 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
21D1043
NSN: 5310-01-033-1193
FSC: 5310 — Nuts and Washers
CAGE: 25140 — GLOBE MOTORS, INC. DBA ALLIENT DAYTON (USA)
SPECIFICATIONS
hole_diameter0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
hardness_rating62.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
outside_diameter0.628 INCHES NOMINAL IN
material_thickness0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
overall_distance_including_keys0.736 INCHES NOMINAL IN
material_document_and_classification44S100 MFR REF ALL MATERIAL RESPONSES OVERALL
NSN5310-01-033-1193
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21D1043 · 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
•
OVERALL DISTANCE INCLUDING KEYS: 0.736 INCHES NOMINAL IN
•
HARDNESS RATING: 62.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: 44S100 MFR REF ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 0.628 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS0.736 INCHES NOMINAL IN
HARDNESS RATING62.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION44S100 MFR REF ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER0.628 INCHES NOMINAL IN
MATERIAL THICKNESS0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
HOLE DIAMETER0.187 INCHES MINIMUM AND 0.189 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 21D1043?
21D1043 is a WASHER,KEY.
What is the NSN for 21D1043?
21D1043 is cataloged in the U.S. Government catalog under NSN 5310-01-033-1193. 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.