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4926-21 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4926-21: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.4400 INCHES NOMINAL IN, bore_diameter: 0.3040 INCHES NOMINAL IN, overall_height: 0.2400 INCHES NOMINAL IN, special_features: MATL-STEEL MIL-S-7420,COMP E52100;NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-013-3638, 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
4926-21
NSN: 5340-00-013-3638
FSC: 5340 — Hardware, Commercial
CAGE: 62983 — EATON AEROSPACE, LLC DBA JACKSON SOUTH (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
end_diameter0.4400 INCHES NOMINAL IN
bore_diameter0.3040 INCHES NOMINAL IN
overall_height0.2400 INCHES NOMINAL IN
special_featuresMATL-STEEL MIL-S-7420,COMP E52100;NOT CASEHARDENED
style_designatorSEAT
first_step_diameter0.6600 INCHES NOMINAL IN
material_hardness_rating58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
distance_from_end_to_first_step0.1400 INCHES NOMINAL IN
NSN5340-00-013-3638
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4926-21 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST STEP DIAMETER: 0.6600 INCHES NOMINAL IN
•
MATERIAL HARDNESS RATING: 58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
•
END DIAMETER: 0.4400 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.1400 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.2400 INCHES NOMINAL IN
FIRST STEP DIAMETER0.6600 INCHES NOMINAL IN
MATERIAL HARDNESS RATING58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
END DIAMETER0.4400 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.1400 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SPECIAL FEATURESMATL-STEEL MIL-S-7420,COMP E52100;NOT CASEHARDENED
BORE DIAMETER0.3040 INCHES NOMINAL IN
MATERIALSTEEL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
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 4926-21?
4926-21 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 4926-21?
4926-21 is cataloged in the U.S. Government catalog under NSN 5340-00-013-3638. 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.