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Technical Data Sheet
PartsTable / COMPONENT / 156 ITEM 31
156 ITEM 31 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include width: 0.372 INCHES NOMINAL IN, length: 1.000 INCHES NOMINAL IN, radius: 0.906 INCHES NOMINAL IN, material: COPPER ALLOY CENTER STUD, bolt_type: REGULAR BEVEL, duty_type: INTERMITTENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-290-4150, 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
156 ITEM 31
NSN: 4730-01-290-4150
FSC: 4730
CAGE: K7018 — WELLMAN GROUP (GBR)
SPECIFICATIONS
width0.372 INCHES NOMINAL IN
length1.000 INCHES NOMINAL IN
radius0.906 INCHES NOMINAL IN
materialCOPPER ALLOY CENTER STUD
bolt_typeREGULAR BEVEL
duty_typeINTERMITTENT
thickness0.372 INCHES NOMINAL IN
body_styleRECTANGULAR COMMUTATOR
body_width0.750 INCHES NOMINAL IN
link_styleOFFSET
action_typeSPRING
top_diameter1.000 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN
NSN4730-01-290-4150
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 156 ITEM 31 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
1-5631Interchangeable
interchangeable cross-reference
interchangeable
A67161Interchangeable
interchangeable cross-reference
interchangeable
32E17Interchangeable
interchangeable cross-reference
interchangeable
S1563Interchangeable
interchangeable cross-reference
interchangeable
S1563ISSUE3Interchangeable
interchangeable cross-reference
interchangeable
103-5120Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 156 ITEM 31?
156 ITEM 31 is a RELAY,ELECTROMAGNETIC.
What parts can replace 156 ITEM 31?
There are 15 known substitutes for 156 ITEM 31: 1-5631, A67161, 32E17 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 156 ITEM 31?
156 ITEM 31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-290-4150. 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