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312839-2 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

312839-2: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN, material: STEEL COMP 303 OVERALLSTEEL COMP 303 OVERALL, groove_width: 0.090 INCHES MAXIMUM0.090 INCHES MAXIMUM IN, thread_length: 0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, groove_diameter: 0.200 INCHES MINIMUM0.200 INCHES MINIMUM IN, surface_treatment: PASSIVATE OVERALLPASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-079-6936, 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
312839-2
NSN: 5340-01-079-6936
FSC: 5340 — Hardware, Commercial
CAGE: 96214 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
length0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN
materialSTEEL COMP 303 OVERALLSTEEL COMP 303 OVERALL
groove_width0.090 INCHES MAXIMUM0.090 INCHES MAXIMUM IN
thread_length0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
groove_diameter0.200 INCHES MINIMUM0.200 INCHES MINIMUM IN
surface_treatmentPASSIVATE OVERALLPASSIVATE OVERALL
width_across_flats0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
cross-sectional_shapeHEXAGONHEXAGON
material_document_and_classificationQQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5340-01-079-6936
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 312839-2 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
•
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
•
LENGTH: 0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
GROOVE DIAMETER: 0.200 INCHES MINIMUM0.200 INCHES MINIMUM IN
•
THREAD LENGTH: 0.210 INCHES NOMINAL RIGHT EXTERNAL0.210 INCHES NOMINAL RIGHT EXTERNAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE: HEXAGONHEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
LENGTH0.200 INCHES NOMINAL0.200 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
GROOVE DIAMETER0.200 INCHES MINIMUM0.200 INCHES MINIMUM IN
THREAD LENGTH0.210 INCHES NOMINAL RIGHT EXTERNAL0.210 INCHES NOMINAL RIGHT EXTERNAL IN
THREAD LENGTH0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD)0.590 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-764, CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPEHEXAGONHEXAGON
SURFACE TREATMENTPASSIVATE OVERALLPASSIVATE OVERALL
MATERIALSTEEL COMP 303 OVERALLSTEEL COMP 303 OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 312839-2?
312839-2 is a STANDOFF,THREADED,SPACING.
What is the NSN for 312839-2?
312839-2 is cataloged in the U.S. Government catalog under NSN 5340-01-079-6936. 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.