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SG3877RBPC20 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SG3877RBPC20: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include case_style: RECESSED, seal_width: 1.062 INCHES NOMINAL IN, sealing_element_style: VERTICAL, accommodated_shaft_diameter: 1.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-440-8928, 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
SG3877RBPC20
NSN: 5330-00-440-8928
FSC: 5330 — Packing and Gasket Materials
CAGE: 16712 — SIEMENS ENERGY, INC. (USA)
SPECIFICATIONS
case_styleRECESSED
seal_width1.062 INCHES NOMINAL IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter1.250 INCHES NOMINAL IN
NSN5330-00-440-8928
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SG3877RBPC20 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
•
SEAL WIDTH: 1.062 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: VERTICAL
•
CASE STYLE: RECESSED
•
ACCOMMODATED SHAFT DIAMETER: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SEAL WIDTH1.062 INCHES NOMINAL IN
SEALING ELEMENT STYLEVERTICAL
CASE STYLERECESSED
ACCOMMODATED SHAFT DIAMETER1.250 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 7
SG3855RBPC20Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SG3875RBPCLN14Reference document
Same NSN cross-reference
Reference document — Secondary reference
FSD1017S1250TYPE2X1X1X4INReference document
Same NSN cross-reference
Reference document — Secondary reference
F-SP-6770-1-1/4-TYPE 2Reference document
Same NSN cross-reference
Reference document — Secondary reference
F-SP-6770Reference document
Same NSN cross-reference
Reference document — Secondary reference
B418-81Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SG3877RBPC20?
SG3877RBPC20 is a SEAL,PLAIN ENCASED.
What parts can replace SG3877RBPC20?
There are 7 known substitutes for SG3877RBPC20: SG3855RBPC20, SG3875RBPCLN14, FSD1017S1250TYPE2X1X1X4IN and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SG3877RBPC20?
SG3877RBPC20 is cataloged in the U.S. Government catalog under NSN 5330-00-440-8928. 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.