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Technical Data Sheet
PartsTable / COMPONENT / 78637-3
78637-3 ✓ 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 SANDBAG SET,CERVICAL,X-RAY is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-102-0341, 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
78637-3
NSN: 5330-01-102-0341
FSC: 5330
CAGE: 09790 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV VALVE & ACTUATOR (USA)
SPECIFICATIONS
special_featuresBRAND NAME DESCRIPTION MAC ACCESSORIES;ADDITIONAL ITEM INFORMATION 5.6GB FWB RAID SLEDGEHMR;REQUIRED MINIMUM ORDER QUANTITY 1;REQUIRED MULTIPLE ORDER QUANTITY 1 GB
NSN5330-01-102-0341
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 78637-3 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: PLASTIC POLYTETRAFLUOROETHYLENE AND GRAPHITE SEALING ELEMENT
•
SEAL WIDTH: 0.170 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
•
CONSTRUCTION: SOLID
•
TEMP RATING: -70.0 CELSIUS AND 550.0 CELSIUS DEGC
•
CROSS-SECTIONAL SHAPE STYLE: C-SECTION W/ HELICAL SPRING
•
HOUSING BORE DIAMETER: 3.250 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 3.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE AND GRAPHITE SEALING ELEMENT
SEAL WIDTH0.170 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
CONSTRUCTIONSOLID
TEMP RATING-70.0 CELSIUS AND 550.0 CELSIUS DEGC
CROSS-SECTIONAL SHAPE STYLEC-SECTION W/ HELICAL SPRING
HOUSING BORE DIAMETER3.250 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER3.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A81-118-1Interchangeable
interchangeable cross-reference
interchangeable
5590706Interchangeable
interchangeable cross-reference
interchangeable
A81-99-5Interchangeable
interchangeable cross-reference
interchangeable
CVCPICInterchangeable
interchangeable cross-reference
interchangeable
786373Interchangeable
interchangeable cross-reference
interchangeable
81995Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 78637-3?
78637-3 is a SANDBAG SET,CERVICAL,X-RAY.
What parts can replace 78637-3?
There are 7 known substitutes for 78637-3: A81-118-1, 5590706, A81-99-5 and 4 more. Substitute compatibility should be verified for your specific system.
Is 78637-3 still available?
78637-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026