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Technical Data Sheet
PartsTable / COMPONENT / L478
L478 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The CAP,IGNITION DISTRIBUTION is a the manufacturer industrial component. Key specifications include material: FIBER AND RUBBER AND FIBER SYNTHETIC OR RUBBER NATURAL BODY, head_style: HEXAGON, head_height: 0.281 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.000 INCHES MINIMUM IN, fastener_length: 1.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-021-5524, 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
L478
NSN: 5305-00-021-5524
FSC: 5305
CAGE: ZY243 — WESTRAC PTY LTD (AUS)
SPECIFICATIONS
materialFIBER AND RUBBER AND FIBER SYNTHETIC OR RUBBER NATURAL BODY
head_styleHEXAGON
head_height0.281 INCHES NOMINAL IN
thread_class2A A
thread_length1.000 INCHES MINIMUM IN
fastener_length1.750 INCHES NOMINAL IN
performance_typeSTANDARD CAPACITY
style_designatorPLAIN
thread_directionRIGHT-HAND
width_between_flats0.562 INCHES NOMINAL IN
cross-sectional_size4L
strengthening_featureSYNTHETIC CORD
NSN5305-00-021-5524
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: L478 · 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
•
THREAD QUANTITY PER INCH: 24
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL: STEEL OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD LENGTH: 1.000 INCHES MINIMUM IN
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
HEAD HEIGHT: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.000 INCHES MINIMUM IN
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
HEAD HEIGHT0.281 INCHES NOMINAL IN
FASTENER LENGTH1.750 INCHES NOMINAL IN
HEAD STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
105831-001Interchangeable
interchangeable cross-reference
interchangeable
LC105831Interchangeable
interchangeable cross-reference
interchangeable
1058-31Interchangeable
interchangeable cross-reference
interchangeable
43-291Interchangeable
interchangeable cross-reference
interchangeable
1A43-291Interchangeable
interchangeable cross-reference
interchangeable
7974253Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is L478?
L478 is a CAP,IGNITION DISTRIBUTION.
What parts can replace L478?
There are 15 known substitutes for L478: 105831-001, LC105831, 1058-31 and 12 more. Substitute compatibility should be verified for your specific system.
Is L478 still available?
L478 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026