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04H21 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

04H21: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 631 OVERALL, hole_diameter: 0.106 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, overall_height: 0.027 INCHES NOMINAL IN, outside_diameter: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN, style_designator: SPRING TENSION, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-959-6870, 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
04H21
NSN: 5310-00-959-6870
FSC: 5310 — Nuts and Washers
CAGE: 23650 — SOLON MANUFACTURING CO DIV SOLON MANUFACTURING CO., INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 631 OVERALL
hole_diameter0.106 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
overall_height0.027 INCHES NOMINAL IN
outside_diameter0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
style_designatorSPRING TENSION
surface_treatmentPASSIVATE OVERALL
material_thickness0.021 INCHES NOMINAL IN
material_document_and_classificationAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-959-6870
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 04H21 · 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
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.021 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 631 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.027 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5528 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
MATERIAL THICKNESS0.021 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALSTEEL COMP 631 OVERALL
HOLE DIAMETER0.106 INCHES MINIMUM AND 0.126 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 04H21?
04H21 is a WASHER,SPRING TENSION.
What is the NSN for 04H21?
04H21 is cataloged in the U.S. Government catalog under NSN 5310-00-959-6870. 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.