PartsTable
Technical Data Sheet
X1-28 ✓ Verified by PartsTable
Philips · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

Immerse yourself in a high-fidelity, comfortable listening experience with the Fidelio X1 Headphones from Philips. Featuring powerful 50-millimeter drivers and open-back architecture, the Fidelio X1 is designed to provide natural sound that is detailed and precise. And with premium memory foam, velvet-wrapped earpads and a self-adjustable air hammock that provides a perfect fit, you'll be able to enjoy your favorite music for hours in comfort.<br><br>- Acoustic open-back architecture for sound clarity<br>- Powerful 50-millimeter neodymium drivers<br>- Pre-tilted drivers directly channel audio into your ears<br>- Memory foam earpads and breathable material for comfort<br>- Genuine calf leather headband and aluminum construction for durability<br><br><b>Open-Back Architecture for Smooth, Pristine Audio</b><br><br>Philips designed the Fidelio X1 Headphones with an acoustic open-back architecture that eliminates air pressure buildup behind the driver so the diaphragm can move freely for a This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-425-4804, indicating validated use in U.S.

government and defense logistics supply chains.

WHERE IT FITS
MRO MRO_GENERAL X1-28
NSN: 5315-00-425-4804
FSC: 5315
CAGE: 20874 — ERIE STRAYER CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
first_end_styleCHAMFERED
pin_overall_length10.312 INCHES NOMINAL IN
first_hole_diameter0.406 INCHES NOMINAL IN
pin_overall_diameter1.2500 INCHES NOMINAL IN
second_hole_diameter0.406 INCHES NOMINAL IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.094 INCHES NOMINAL IN
hole_arrangement_styleBOTH END DRILLED
second_end_relationship_with_first_endIDENTICAL
center_to_center_distance_between_holes9.500 INCHES NOMINAL IN
distance_from_centerline_of_hole_to_end_of_pin0.406 INCHES NOMINAL IN
NSN5315-00-425-4804
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: X1-28 · Philips ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
MATERIAL: STEEL OVERALL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN: 0.406 INCHES NOMINAL IN
FIRST END TAPER LENGTH: 0.094 INCHES NOMINAL IN
FIRST END STYLE: CHAMFERED
HOLE ARRANGEMENT STYLE: BOTH END DRILLED
SECOND HOLE DIAMETER: 0.406 INCHES NOMINAL IN
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.406 INCHES NOMINAL IN
FIRST END TAPER LENGTH0.094 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
HOLE ARRANGEMENT STYLEBOTH END DRILLED
SECOND HOLE DIAMETER0.406 INCHES NOMINAL IN
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
PIN OVERALL DIAMETER1.2500 INCHES NOMINAL IN
PIN OVERALL LENGTH10.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
2838Interchangeable
IBM 10/100Mbps PCI Ethernet IOA
interchangeable
D15-648GPC183-184Interchangeable
interchangeable cross-reference
interchangeable
CV9-S5330-9 ALT E REV 4 (PC-183)Interchangeable
interchangeable cross-reference
interchangeable
F09G3R50BInterchangeable
interchangeable cross-reference
interchangeable
FNM-31/2Interchangeable
interchangeable cross-reference
interchangeable
MS90085-56-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X1-28?
X1-28 is a FILTER,BAND PASS manufactured by Philips. It is classified as a MRO (MRO_GENERAL).
What parts can replace X1-28?
There are 13 known substitutes for X1-28: 2838, D15-648GPC183-184, CV9-S5330-9 ALT E REV 4 (PC-183) and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X1-28?
X1-28 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-425-4804. This indicates validated use in U.S. government and defense supply chains.
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