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42304B — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

42304B: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL COMP 630, overall_height: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, flange_diameter: 0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN, flange_thickness: 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN, style_designator: IRREGULAR, surface_treatment: PASSIVATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-125-9232, 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
42304B
NSN: 5340-01-125-9232
FSC: 5340 — Hardware, Commercial
CAGE: 45934 — ONTIC ENGINEERING & MANUFACTURING, INC DBA ONTIC US (USA)
SPECIFICATIONS
materialSTEEL COMP 630
overall_height0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
flange_diameter0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
flange_thickness0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
style_designatorIRREGULAR
surface_treatmentPASSIVATE
body_inside_diameter0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
body_outside_diameter0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_document_and_classificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-125-9232
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 42304B 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
•
FLANGE DIAMETER: 0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
•
FLANGE THICKNESS: 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: IRREGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
OVERALL HEIGHT0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
FLANGE THICKNESS0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
STYLE DESIGNATORIRREGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE
BODY INSIDE DIAMETER0.061 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL COMP 630
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 1
10366582Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 42304B?
42304B is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace 42304B?
There is 1 known substitute for 42304B: 10366582. Substitute compatibility should be verified for your specific system.
What is the NSN for 42304B?
42304B is cataloged in the U.S. Government catalog under NSN 5340-01-125-9232. 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.