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259921R1 — Technical Data Sheet

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— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The GUIDE,VALVE STEM is a the manufacturer industrial component. Key specifications include material: STEEL, bore_diameter: 0.4300 INCHES NOMINAL IN, overall_length: 5.125 INCHES NOMINAL IN, bore_counterbore: NOT INCLUDED, bore_countersink: NOT INCLUDED, outside_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 2815-00-424-7185, 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
259921R1
NSN: 2815-00-424-7185
FSC: 2815
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialSTEEL
bore_diameter0.4300 INCHES NOMINAL IN
overall_length5.125 INCHES NOMINAL IN
bore_counterboreNOT INCLUDED
bore_countersinkNOT INCLUDED
outside_diameter0.750 INCHES NOMINAL IN
style_designatorPLAIN
aa_end_chamfer_length0.156 INCHES NOMINAL IN
bb_end_chamfer_length0.031 INCHES NOMINAL IN
aa_end_chamfer_angle_in_deg15.0
bb_end_chamfer_angle_in_deg30.0
NSN2815-00-424-7185
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUIDE,VALVE STEM TITLE COMPONENT PN 259921R1 MFR GUIDE,VALVE STEM
KEY FEATURES
•
BB END CHAMFER ANGLE IN DEG: 30.0
•
AA END CHAMFER LENGTH: 0.156 INCHES NOMINAL IN
•
BORE COUNTERBORE: NOT INCLUDED
•
BORE COUNTERSINK: NOT INCLUDED
•
AA END CHAMFER ANGLE IN DEG: 15.0
•
STYLE DESIGNATOR: PLAIN
•
BB END CHAMFER LENGTH: 0.031 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
BB END CHAMFER ANGLE IN DEG30.0
AA END CHAMFER LENGTH0.156 INCHES NOMINAL IN
BORE COUNTERBORENOT INCLUDED
BORE COUNTERSINKNOT INCLUDED
AA END CHAMFER ANGLE IN DEG15.0
STYLE DESIGNATORPLAIN
BB END CHAMFER LENGTH0.031 INCHES NOMINAL IN
MATERIALSTEEL
BORE DIAMETER0.4300 INCHES NOMINAL IN
OUTSIDE DIAMETER0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
G691InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3300InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
S7754Y-G69-01InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B6-01InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SS1&18InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SSRF-4ZZRA5P25LG49PInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 259921R1?
259921R1 is a GUIDE,VALVE STEM.
What parts can replace 259921R1?
There are 10 known substitutes for 259921R1: G691, 3300, S7754Y-G69-01 and 7 more. Substitute compatibility should be verified for your specific system.
Is 259921R1 still available?
259921R1 is currently cancelled.
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Last verified: October 2026