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53X-02-258 — PLUG,VENT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

53X-02-258: PLUG,VENT.

The PLUG,VENT is a the manufacturer industrial component. Key specifications include length: 1.620 INCHES NOMINAL IN, material: STEEL, inside_diameter: 0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, vent_hole_shape: ROUND, outside_diameter: 1.175 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN, special_features: FOUR ADD'L. THREADED THRU HOLES,0.190-24 UNC-2B,EQUALLY SPACED ON A 0.150 IN.

BOLT CIRCLE IN. This part is cataloged in the U.S. Government catalog under NSN 5340-01-356-9559, 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
53X-02-258
NSN: 5340-01-356-9559
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
length1.620 INCHES NOMINAL IN
materialSTEEL
inside_diameter0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
vent_hole_shapeROUND
outside_diameter1.175 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN
special_featuresFOUR ADD'L. THREADED THRU HOLES,0.190-24 UNC-2B,EQUALLY SPACED ON A 0.150 IN. BOLT CIRCLE IN
vent_hole_diameter0.344 INCHES NOMINAL IN
vent_hole_quantity4
end_connection_typeUNTHREADED
material_document_and_classificationQQ-S-766C, 316L FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-356-9559
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 53X-02-258 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
•
VENT HOLE DIAMETER: 0.344 INCHES NOMINAL IN
•
LENGTH: 1.620 INCHES NOMINAL IN
•
VENT HOLE SHAPE: ROUND
•
END CONNECTION TYPE: UNTHREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766C, 316L FED SPEC SINGLE MATERIAL RESPONSE
•
OUTSIDE DIAMETER: 1.175 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
VENT HOLE DIAMETER0.344 INCHES NOMINAL IN
LENGTH1.620 INCHES NOMINAL IN
VENT HOLE SHAPEROUND
END CONNECTION TYPEUNTHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766C, 316L FED SPEC SINGLE MATERIAL RESPONSE
OUTSIDE DIAMETER1.175 INCHES MINIMUM AND 1.176 INCHES MAXIMUM IN
INSIDE DIAMETER0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
SPECIAL FEATURESFOUR ADD'L. THREADED THRU HOLES,0.190-24 UNC-2B,EQUALLY SPACED ON A 0.150 IN. BOLT CIRCLE IN
MATERIALSTEEL
VENT HOLE QUANTITY4
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 53X-02-258?
53X-02-258 is a PLUG,VENT.
What is the NSN for 53X-02-258?
53X-02-258 is cataloged in the U.S. Government catalog under NSN 5340-01-356-9559. 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.