PartsTable
Technical Data Sheet
PartsTable / MRO / 153581
153581 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 SWITCH,FLOW is a the manufacturer industrial component. Key specifications include end_item_identification: HILLER INDUSTRIES RATIO RELAY MDL 21; BOILERS,1200 PSI. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-411-9295, 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
MRO→ MRO_GENERAL→ 153581
NSN: 5305-00-411-9295
FSC: 5305
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
end_item_identificationHILLER INDUSTRIES RATIO RELAY MDL 21; BOILERS,1200 PSI
NSN5305-00-411-9295
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 153581 · 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 4
15358-1Interchangeable
interchangeable cross-reference
interchangeable
21675-1Interchangeable
interchangeable cross-reference
interchangeable
17921-3Interchangeable
interchangeable cross-reference
interchangeable
EB-7031Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 153581?
153581 is a SWITCH,FLOW. It is classified as a MRO (MRO_GENERAL).
What parts can replace 153581?
There are 4 known substitutes for 153581: 15358-1, 21675-1, 17921-3 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 153581?
153581 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-411-9295. 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: July 2026