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Technical Data Sheet
D177 ✓ 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 BLOCK ASSY,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1022 OVERALL, corner_shape: SQUARE INSIDE LEFT CORNER, overall_length: 0.7940 INCHES MINIMUM AND 0.7980 INCHES MAXIMUM IN, hardness_rating: 55.0 ROCKWELL C MINIMUM OVERALL, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, features_provided: CASEHARDENED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-308-8154, 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
D177
NSN: 5340-00-308-8154
FSC: 5340
CAGE: 30793 — INSINGER MACHINE CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1022 OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
overall_length0.7940 INCHES MINIMUM AND 0.7980 INCHES MAXIMUM IN
hardness_rating55.0 ROCKWELL C MINIMUM OVERALL
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
features_providedCASEHARDENED
body_inside_diameter2.5590 INCHES MINIMUM AND 2.5600 INCHES MAXIMUM IN
body_outside_diameter3.1850 INCHES MINIMUM AND 3.1900 INCHES MAXIMUM IN
NSN5340-00-308-8154
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D177 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
D177Interchangeable
interchangeable cross-reference
interchangeable
8023Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D177?
D177 is a BLOCK ASSY,VALVE.
What parts can replace D177?
There are 2 known substitutes for D177: D177, 8023. Substitute compatibility should be verified for your specific system.
What is the NSN for D177?
D177 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-308-8154. This indicates validated use in U.S. government and defense supply chains.
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