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421373 — RADIATOR,ENGINE COOLANT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

421373: RADIATOR,ENGINE COOLANT.

The RADIATOR,ENGINE COOLANT is a the manufacturer industrial component. Key specifications include fan_shroud: INCLUDEDINCLUDED, filler_neck: INCLUDEDINCLUDED, core_quantity: 11, overall_width: 28.375 INCHES NOMINAL28.375 INCHES NOMINAL IN, tank_location: LOWER FIRST TANK LOWERLOWER FIRST TANK LOWER, tank_quantity: 1 2D TANK UPPER1 2D TANK UPPER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-042-1373, 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
421373
NSN: 5305-00-042-1373
NIINs: 000421373, 006106004, 006258066
FSC: 5305 — Screws
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
fan_shroudINCLUDEDINCLUDED
filler_neckINCLUDEDINCLUDED
core_quantity11
overall_width28.375 INCHES NOMINAL28.375 INCHES NOMINAL IN
tank_locationLOWER FIRST TANK LOWERLOWER FIRST TANK LOWER
tank_quantity1 2D TANK UPPER1 2D TANK UPPER
core_thickness3.562 INCHES NOMINAL3.562 INCHES NOMINAL IN
overall_height36.438 INCHES NOMINAL36.438 INCHES NOMINAL IN
mounting_methodBRACKET(S) SIDEBRACKET(S) SIDE
mounting_featureINCLUDEDINCLUDED
overall_thickness4.125 INCHES NOMINAL4.125 INCHES NOMINAL IN
filler_neck_quantity11
NSN5305-00-042-1373
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 421373 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FASTENER LENGTH: 0.250 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.183 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 2S STYLE
•
SCREW MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.250 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
THREAD LENGTH0.183 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 2S STYLE
SCREW MATERIALCOPPER ALLOY
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
INTERNAL DRIVE STYLESLOT
SUBSTITUTES & CROSS-REFERENCES 1
FFS92Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 421373?
421373 is a RADIATOR,ENGINE COOLANT.
What parts can replace 421373?
There is 1 known substitute for 421373: FFS92. Substitute compatibility should be verified for your specific system.
What is the NSN for 421373?
421373 is cataloged in the U.S. Government catalog under NSN 5305-00-042-1373. This indicates validated use in U.S. government and defense supply chains.
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