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P312254 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

P312254: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL, overall_height: 3.465 INCHES NOMINAL IN, style_designator: IRREGULAR, body_inside_diameter: 3.700 INCHES NOMINAL IN, body_outside_diameter: 4.131 INCHES MINIMUM AND 4.132 INCHES MAXIMUM IN, casehardening_indicator: CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-515-7987, 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
P312254
NSN: 5340-01-515-7987
FSC: 5340 — Hardware, Commercial
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL
overall_height3.465 INCHES NOMINAL IN
style_designatorIRREGULAR
body_inside_diameter3.700 INCHES NOMINAL IN
body_outside_diameter4.131 INCHES MINIMUM AND 4.132 INCHES MAXIMUM IN
casehardening_indicatorCASEHARDENED
end_item_identificationPUMP,FUEL INJECTOR
material_hardness_rating48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
part_name_assigned_by_controlling_agencySPRING GUIDE
NSN5340-01-515-7987
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: P312254 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
•
MATERIAL HARDNESS RATING: 48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
•
BODY OUTSIDE DIAMETER: 4.131 INCHES MINIMUM AND 4.132 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: IRREGULAR
•
BODY INSIDE DIAMETER: 3.700 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: CASEHARDENED
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT3.465 INCHES NOMINAL IN
MATERIAL HARDNESS RATING48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
BODY OUTSIDE DIAMETER4.131 INCHES MINIMUM AND 4.132 INCHES MAXIMUM IN
STYLE DESIGNATORIRREGULAR
BODY INSIDE DIAMETER3.700 INCHES NOMINAL IN
CASEHARDENING INDICATORCASEHARDENED
PART NAME ASSIGNED BY CONTROLLING AGENCYSPRING GUIDE
END ITEM IDENTIFICATIONPUMP,FUEL INJECTOR
MATERIALSTEEL
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
P970620 ITEM SEQ. 21Reference 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 P312254?
P312254 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace P312254?
There is 1 known substitute for P312254: P970620 ITEM SEQ. 21. Substitute compatibility should be verified for your specific system.
What is the NSN for P312254?
P312254 is cataloged in the U.S. Government catalog under NSN 5340-01-515-7987. 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.