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Technical Data Sheet

20574/200.1 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

20574/200.1: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN, outside_diameter: 0.382 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, material_thickness: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN, external_prebent_key_width: 0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN, external_prebent_key_length: 0.064 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-141-9639, 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
20574/200.1
NSN: 5310-01-141-9639
FSC: 5310 — Nuts and Washers
CAGE: K0735 — TRIDENT MARITIME SYSTEMS UK LIMITED (GBR)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
outside_diameter0.382 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
material_thickness0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
external_key_quantity1
external_prebent_key_width0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
external_prebent_key_length0.064 INCHES NOMINAL IN
material_document_and_classificationBS970,PT.4,416S41,FSCM K0639 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-141-9639
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20574/200.1 · 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 PREBENT KEY LENGTH: 0.064 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: BS970,PT.4,416S41,FSCM K0639 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.382 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 1
•
EXTERNAL PREBENT KEY WIDTH: 0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTERNAL PREBENT KEY LENGTH0.064 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONBS970,PT.4,416S41,FSCM K0639 MFR REF SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.382 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
MATERIAL THICKNESS0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY1
EXTERNAL PREBENT KEY WIDTH0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING OVERALL
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 20574/200.1?
20574/200.1 is a WASHER,KEY.
What is the NSN for 20574/200.1?
20574/200.1 is cataloged in the U.S. Government catalog under NSN 5310-01-141-9639. 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.