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Technical Data Sheet
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NK3228-1 — Technical Data Sheet

✓ 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,SHOULDER,VALV is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-121-2554, 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
NK3228-1
NSN: 5305-01-121-2554
FSC: 5305
CAGE: 8FGX3 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORP DBA STEAM & AIR SOLUTIONS DIV CURTISS-WRIGHT STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
Part NumberNK3228-1
NSN5305-01-121-2554
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NK3228-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
445MDP1Interchangeable
interchangeable cross-reference
interchangeable
572029Interchangeable
interchangeable cross-reference
interchangeable
NM1224-1Interchangeable
interchangeable cross-reference
interchangeable
NK3172-1Interchangeable
interchangeable cross-reference
interchangeable
PDL73405ITEM267Interchangeable
interchangeable cross-reference
interchangeable
959-129Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NK3228-1?
NK3228-1 is a SCREW,SHOULDER,VALV.
What parts can replace NK3228-1?
There are 20 known substitutes for NK3228-1: 445MDP1, 572029, NM1224-1 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NK3228-1?
NK3228-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-121-2554. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026