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Technical Data Sheet
PartsTable / COMPONENT / PK55Z4-4
PK55Z4-4 ✓ 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 SCREW,TAPPING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, head_style: BINDING, head_height: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN, head_diameter: 0.214 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, fastener_length: 0.250 INCHES NOMINAL IN, features_provided: CASEHARDENED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-497-4080, 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
PK55Z4-4
NSN: 5305-00-497-4080
FSC: 5305
CAGE: 45722 — USM CORP SUB OF EMHART INDUSTRIES INC PARKER-KALON FASTENER DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
head_styleBINDING
head_height0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
head_diameter0.214 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
fastener_length0.250 INCHES NOMINAL IN
features_providedCASEHARDENED
internal_drive_styleSLOT
nonmachine_thread_styleDOG TYPE (TYPE B OR C)
nonmachine_nominal_thread_diameter0.112 INCHES IN
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5305-00-497-4080
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PK55Z4-4 · 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
•
HEAD STYLE: BINDING
•
MATERIAL: STEEL COMP 1010 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HEAD DIAMETER: 0.214 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: SLOT
•
HEAD HEIGHT: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
NONMACHINE THREAD STYLE: DOG TYPE (TYPE B OR C)
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.112 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEBINDING
MATERIALSTEEL COMP 1010 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD DIAMETER0.214 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
INTERNAL DRIVE STYLESLOT
HEAD HEIGHT0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
NONMACHINE THREAD STYLEDOG TYPE (TYPE B OR C)
NONMACHINE NOMINAL THREAD DIAMETER0.112 INCHES IN
FEATURES PROVIDEDCASEHARDENED
FASTENER LENGTH0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
7468Interchangeable
interchangeable cross-reference
interchangeable
UA32377Interchangeable
interchangeable cross-reference
interchangeable
31-33485-3Interchangeable
interchangeable cross-reference
interchangeable
4815-0902Interchangeable
interchangeable cross-reference
interchangeable
33485-3Interchangeable
interchangeable cross-reference
interchangeable
228M0086P003Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PK55Z4-4?
PK55Z4-4 is a SCREW,TAPPING.
What parts can replace PK55Z4-4?
There are 10 known substitutes for PK55Z4-4: 7468, UA32377, 31-33485-3 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PK55Z4-4?
PK55Z4-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-497-4080. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026