PartsTable
Technical Data Sheet
PartsTable / COMPONENT / PK55Z8-4
PK55Z8-4 ✓ 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 head_style: PAN NO. 2, head_height: 0.085 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN, head_diameter: 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, fastener_length: 0.250 INCHES NOMINAL IN, features_provided: CASEHARDENED, surface_treatment: CADMIUM OVERALL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-497-4085, 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
PK55Z8-4
NSN: 5305-00-497-4085
FSC: 5305
CAGE: 45722 — USM CORP SUB OF EMHART INDUSTRIES INC PARKER-KALON FASTENER DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
head_stylePAN NO. 2
head_height0.085 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
head_diameter0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
fastener_length0.250 INCHES NOMINAL IN
features_providedCASEHARDENED
surface_treatmentCADMIUM OVERALL
internal_drive_styleSLOT
nonmachine_thread_styleDOG TYPE (TYPE B OR C)
nondefinitive_spec/std_dataB TYPE AND 9S STYLE
nonmachine_nominal_thread_diameter0.164 INCHES IN
material_document_and_classificationQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5305-00-497-4085
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PK55Z8-4 · 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
•
NONMACHINE THREAD STYLE: DOG TYPE (TYPE B OR C)
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: B TYPE AND 9S STYLE
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
FASTENER LENGTH: 0.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
•
HEAD STYLE: PAN NO. 2
TECHNICAL CHARACTERISTICS (FLIS)
NONMACHINE THREAD STYLEDOG TYPE (TYPE B OR C)
NONMACHINE NOMINAL THREAD DIAMETER0.164 INCHES IN
NONDEFINITIVE SPEC/STD DATAB TYPE AND 9S STYLE
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
FASTENER LENGTH0.250 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
HEAD STYLEPAN NO. 2
MATERIALSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
HEAD DIAMETER0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
FFS107TYPEBSTYLE9SInterchangeable
interchangeable cross-reference
interchangeable
145181Interchangeable
interchangeable cross-reference
interchangeable
43800Interchangeable
interchangeable cross-reference
interchangeable
145183Interchangeable
interchangeable cross-reference
interchangeable
145191Interchangeable
interchangeable cross-reference
interchangeable
145193Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy PK55Z8-4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is PK55Z8-4?
PK55Z8-4 is a SCREW,TAPPING.
What parts can replace PK55Z8-4?
There are 15 known substitutes for PK55Z8-4: FFS107TYPEBSTYLE9S, 145181, 43800 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PK55Z8-4?
PK55Z8-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-497-4085. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — PK55Z8-4

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026