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Technical Data Sheet
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57309 — COVER,ACCESS,GUIDED MISSILE COMP

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

57309: COVER,ACCESS,GUIDED MISSILE COMP.

COVER,ACCESS,GUIDED MISSILE COMP. Key specifications include end_item_identification: AIM-4F MISSILE. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-126-5204, 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
57309
NSN: 5331-00-126-5204
NIINs: 001265204, 002822379, 005912550, 009819429
FSC: 5331 — O-ring
CAGE: 20266 — ELKHART BRASS MANUFACTURING COMPANY, LLC DIV ELKHART BRASS MANUFACTURING COMPANY (USA)
SPECIFICATIONS
special_featuresFUNCTIONAL DESCRIPTION:COVER FOR CHART HOLDER;LENGTH 5.438 IN.;WIDTH 3.122 IN.;HEIGHT 0.797 IN.;RECTANGULAR HOLE CENTERED ON COVER 2.187 LONG;1.126 WIDE; IN
end_item_identificationAIM-4F MISSILE
NSN5331-00-126-5204
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 57309 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
•
CROSS-SECTIONAL HEIGHT: 0.132 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.132 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES 2
5083EReference document
Same NSN cross-reference
Reference document — Design control — primary reference
60603-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 57309?
57309 is a COVER,ACCESS,GUIDED MISSILE COMP.
What parts can replace 57309?
There are 2 known substitutes for 57309: 5083E, 60603-12. Substitute compatibility should be verified for your specific system.
What is the NSN for 57309?
57309 is cataloged in the U.S. Government catalog under NSN 5331-00-126-5204. 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.