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Technical Data Sheet
PartsTable / COMPONENT / 77M69-20 ITEM 22
77M69-20 ITEM 22 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE, design_type: SOLID, end_diameter: 1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN, bore_diameter: 1.2500 INCHES NOMINAL IN, overall_height: 4.1880 INCHES NOMINAL IN, style_designator: SEAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-067-9044, 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
77M69-20 ITEM 22
NSN: 5340-01-067-9044
FSC: 5340
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE
design_typeSOLID
end_diameter1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
bore_diameter1.2500 INCHES NOMINAL IN
overall_height4.1880 INCHES NOMINAL IN
style_designatorSEAT
first_step_length0.1880 INCHES NOMINAL IN
first_step_diameter3.0500 INCHES MINIMUM AND 3.0540 INCHES MAXIMUM IN
second_end_diameter1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
distance_from_end_to_first_step2.0000 INCHES NOMINAL IN
material_document_and_classificationMIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-067-9044
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 77M69-20 ITEM 22 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
•
FIRST STEP DIAMETER: 3.0500 INCHES MINIMUM AND 3.0540 INCHES MAXIMUM IN
•
END DIAMETER: 1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
•
SECOND END DIAMETER: 1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 2.0000 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE
•
FIRST STEP LENGTH: 0.1880 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
FIRST STEP DIAMETER3.0500 INCHES MINIMUM AND 3.0540 INCHES MAXIMUM IN
END DIAMETER1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
SECOND END DIAMETER1.7770 INCHES MINIMUM AND 1.7780 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP2.0000 INCHES NOMINAL IN
DESIGN TYPESOLID
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE
FIRST STEP LENGTH0.1880 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE
STYLE DESIGNATORSEAT
BORE DIAMETER1.2500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
HP94732Interchangeable
interchangeable cross-reference
interchangeable
94732Interchangeable
interchangeable cross-reference
interchangeable
D12552-2Interchangeable
interchangeable cross-reference
interchangeable
12552-2Interchangeable
interchangeable cross-reference
interchangeable
5D0191-2Interchangeable
interchangeable cross-reference
interchangeable
DEI-1255/22Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 77M69-20 ITEM 22?
77M69-20 ITEM 22 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 77M69-20 ITEM 22?
There are 7 known substitutes for 77M69-20 ITEM 22: HP94732, 94732, D12552-2 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 77M69-20 ITEM 22?
77M69-20 ITEM 22 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-067-9044. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026