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87A ✓ 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 TROLLEY,HOIST is a the manufacturer industrial component. Key specifications include document_title: GM PARTS DIV HISTORY CATALOG 1976/1981. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-8972, 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
87A
NSN: 5330-00-291-8972
FSC: 5330
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
document_titleGM PARTS DIV HISTORY CATALOG 1976/1981
NSN5330-00-291-8972
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 87A 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
•
BOLT CIRCLE DIAMETER: 2.688 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL: PAPER AND GLUE OVERALL
•
HOLE DIAMETER: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
SIDE RADIUS FROM GASKET CENTER: 1.094 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803 F326128-6 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BOLT HOLE QUANTITY: 2
TECHNICAL CHARACTERISTICS (FLIS)
BOLT CIRCLE DIAMETER2.688 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
MATERIALPAPER AND GLUE OVERALL
HOLE DIAMETER0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL WIDTH3.500 INCHES NOMINAL IN
SIDE RADIUS FROM GASKET CENTER1.094 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803 F326128-6 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
BOLT HOLE QUANTITY2
APERTURE DIAMETER1.438 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.032 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
1272SInterchangeable
interchangeable cross-reference
interchangeable
8176257Interchangeable
interchangeable cross-reference
interchangeable
GGG-W-636 TY17CL3Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
PA3171Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 87A?
87A is a TROLLEY,HOIST.
What parts can replace 87A?
There are 22 known substitutes for 87A: 1272S, 8176257, GGG-W-636 TY17CL3 and 19 more. Substitute compatibility should be verified for your specific system.
Is 87A still available?
87A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026