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4007021 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4007021: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hardness_rating: 36.0 ROCKWELL C MINIMUM, outside_diameter: 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN, material_thickness: 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, external_straight_key_width: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, overall_distance_including_keys: 1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-367-8770, 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
4007021
NSN: 5310-00-367-8770
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hardness_rating36.0 ROCKWELL C MINIMUM
outside_diameter1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
material_thickness0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
external_key_quantity2
external_straight_key_width0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
overall_distance_including_keys1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
material_document_and_classificationAMS5596 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-367-8770
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4007021 · 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: 1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5596 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 2
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5596 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
MATERIAL THICKNESS0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY2
MATERIALSTEEL 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 1
5310PL0723122Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4007021?
4007021 is a WASHER,KEY.
What parts can replace 4007021?
There is 1 known substitute for 4007021: 5310PL0723122. Substitute compatibility should be verified for your specific system.
What is the NSN for 4007021?
4007021 is cataloged in the U.S. Government catalog under NSN 5310-00-367-8770. 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.