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749012-2 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

749012-2: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include overall_height: 1.096 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN, flange_diameter: 1.0228 INCHES MINIMUM AND 1.0233 INCHES MAXIMUM IN, casehardening_indicator: NOT CASEHARDENED, material_hardness_rating: 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-008-1687, 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
749012-2
NSN: 5340-01-008-1687
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
overall_height1.096 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN
flange_diameter1.0228 INCHES MINIMUM AND 1.0233 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM
NSN5340-01-008-1687
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 749012-2 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
•
FLANGE DIAMETER: 1.0228 INCHES MINIMUM AND 1.0233 INCHES MAXIMUM IN
•
MATERIAL HARDNESS RATING: 53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER1.0228 INCHES MINIMUM AND 1.0233 INCHES MAXIMUM IN
OVERALL HEIGHT1.096 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN
MATERIAL HARDNESS RATING53.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM
CASEHARDENING INDICATORNOT CASEHARDENED
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 749012-2?
749012-2 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 749012-2?
749012-2 is cataloged in the U.S. Government catalog under NSN 5340-01-008-1687. 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.