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277577R1 — GUIDE,VALVE STEM

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

277577R1: GUIDE,VALVE STEM.

The GUIDE,VALVE STEM is a the manufacturer industrial component. Key specifications include material: STEEL, bore_diameter: 0.4375 INCHES NOMINAL IN, overall_length: 3.418 INCHES NOMINAL IN, bore_counterbore: NOT INCLUDED, bore_countersink: NOT INCLUDED, outside_diameter: 0.687 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-866-4590, 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
277577R1
NSN: 2815-00-866-4590
FSC: 2815 — Diesel Engines and Components
CAGE: 0SAT8 — KOMATSU AMERICA CORP. (USA)
SPECIFICATIONS
materialSTEEL
bore_diameter0.4375 INCHES NOMINAL IN
overall_length3.418 INCHES NOMINAL IN
bore_counterboreNOT INCLUDED
bore_countersinkNOT INCLUDED
outside_diameter0.687 INCHES NOMINAL IN
style_designatorPLAIN
aa_end_chamfer_length0.150 INCHES NOMINAL IN
bb_end_chamfer_length0.050 INCHES NOMINAL IN
aa_end_chamfer_angle_in_deg15.0
bb_end_chamfer_angle_in_deg30.0
NSN2815-00-866-4590
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUIDE,VALVE STEM TITLE COMPONENT PN 277577R1 MFR GUIDE,VALVE STEM
KEY FEATURES
•
AA END CHAMFER ANGLE IN DEG: 15.0
•
AA END CHAMFER LENGTH: 0.150 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BORE COUNTERBORE: NOT INCLUDED
•
OUTSIDE DIAMETER: 0.687 INCHES NOMINAL IN
•
BB END CHAMFER LENGTH: 0.050 INCHES NOMINAL IN
•
BB END CHAMFER ANGLE IN DEG: 30.0
TECHNICAL CHARACTERISTICS
AA END CHAMFER ANGLE IN DEG15.0
AA END CHAMFER LENGTH0.150 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
OVERALL LENGTH3.418 INCHES NOMINAL IN
BORE COUNTERBORENOT INCLUDED
OUTSIDE DIAMETER0.687 INCHES NOMINAL IN
BB END CHAMFER LENGTH0.050 INCHES NOMINAL IN
BB END CHAMFER ANGLE IN DEG30.0
BORE DIAMETER0.4375 INCHES NOMINAL IN
MATERIALSTEEL
OTHER ITEMS IN FSC 2815 — Diesel Engines and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2815-00-011-9099 2815-00-017-1875 2815-00-024-4185 2815-00-033-1482 2815-00-036-5350 2815-00-179-7630 2815-00-346-4639 2815-00-592-5308
SUBSTITUTES & CROSS-REFERENCES 1
125-3198Reference 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 277577R1?
277577R1 is a GUIDE,VALVE STEM.
What parts can replace 277577R1?
There is 1 known substitute for 277577R1: 125-3198. Substitute compatibility should be verified for your specific system.
What is the NSN for 277577R1?
277577R1 is cataloged in the U.S. Government catalog under NSN 2815-00-866-4590. 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.