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S1977 ✓ 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

The HANGER,SPRING,VEHICLE is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-735-5902, 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
S1977
NSN: 5340-00-735-5902
FSC: 5340
CAGE: 92196 — UNIVERSAL INDUSTRIES INC
SPECIFICATIONS
Part NumberS1977
NSN5340-00-735-5902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S1977 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
•
DIAMETER: 0.204 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-636,COND A FED SPEC SINGLE MATERIAL RESPONSE BAND
•
MATERIAL: STEEL COMP 1010 BAND
•
SURFACE TREATMENT: CADMIUM BAND
•
STYLE DESIGNATOR: OFFSET MOUNT
•
DISTANCE FROM LOOP CENTER TO TONGUE END: 0.748 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 0.560 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DIAMETER0.204 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-636,COND A FED SPEC SINGLE MATERIAL RESPONSE BAND
OVERALL WIDTH0.437 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 BAND
SURFACE TREATMENTCADMIUM BAND
STYLE DESIGNATOROFFSET MOUNT
DISTANCE FROM LOOP CENTER TO TONGUE END0.748 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE0.560 INCHES NOMINAL IN
LOOP INSIDE DIAMETER0.438 INCHES NOMINAL IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE CUSHION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
10001327Interchangeable
interchangeable cross-reference
interchangeable
S1977Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S1977?
S1977 is a HANGER,SPRING,VEHICLE.
What parts can replace S1977?
There are 2 known substitutes for S1977: 10001327, S1977. Substitute compatibility should be verified for your specific system.
What is the NSN for S1977?
S1977 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-735-5902. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026