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03309-18 — LOWER ENGINE C,SPEC

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

03309-18: LOWER ENGINE C,SPEC.

The LOWER ENGINE C,SPEC is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, thickness: 0.035 INCHES MINIMUM IN, hole_diameter: 0.203 INCHES NOMINAL IN, overall_diameter: 0.562 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-549-4543, 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
03309-18
NSN: 5310-01-549-4543
NIINs: 015494543, 015941670
FSC: 5310 — Nuts and Washers
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
thickness0.035 INCHES MINIMUM IN
hole_diameter0.203 INCHES NOMINAL IN
overall_diameter0.562 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identification2350-01-368-9500
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyLOW FRICTION PTFE FLAT WASHER
NSN5310-01-549-4543
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 03309-18 · OEM ⚠ 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
•
OVERALL DIAMETER: 0.562 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: WHITE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.562 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORWHITE OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYLOW FRICTION PTFE FLAT WASHER
END ITEM IDENTIFICATION2350-01-368-9500
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.203 INCHES NOMINAL IN
THICKNESS0.035 INCHES MINIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
95630A455Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 03309-18?
03309-18 is a LOWER ENGINE C,SPEC.
What parts can replace 03309-18?
There is 1 known substitute for 03309-18: 95630A455. Substitute compatibility should be verified for your specific system.
What is the NSN for 03309-18?
03309-18 is cataloged in the U.S. Government catalog under NSN 5310-01-549-4543. 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.