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Technical Data Sheet

156/33 — SPRING ASSEMBLY,LEAF

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

156/33: SPRING ASSEMBLY,LEAF.

The SPRING ASSEMBLY,LEAF is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, design_type: MAINSPRING, overall_width: 3.200 INCHES MAXIMUM IN, elliptic_shape: SEMI, inclosure_type: FULLY INCLOSED, overall_height: 4.060 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-217-2819, 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
156/33
NSN: 4730-00-217-2819
NIINs: 002172819, 003181018, 012952284, 013741650, 015652679
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: K7018 — WELLMAN GROUP (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
design_typeMAINSPRING
overall_width3.200 INCHES MAXIMUM IN
elliptic_shapeSEMI
inclosure_typeFULLY INCLOSED
overall_height4.060 INCHES MAXIMUM IN
overall_length3.200 INCHES MAXIMUM IN
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
special_featuresSOVEREIGN COMPACT CART; VITRECTOMY CART W/ MAYO TRAY; FOR USE WITH END ITEM VITRECTOMY SYSTEM, ANTERIOR, WHITESTAR, 6515-01-537-6741
nominal_thread_size0.138 INCHES SINGLE GROUP IN
rebound_clip_quantity4
NSN4730-00-217-2819
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 156/33 · 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
KEY FEATURES
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATION4310-00-912-3043
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
3216901SH1PC36Reference document
Same NSN cross-reference
Reference document — Secondary reference
80719Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 156/33?
156/33 is a SPRING ASSEMBLY,LEAF.
What parts can replace 156/33?
There are 2 known substitutes for 156/33: 3216901SH1PC36, 80719. Substitute compatibility should be verified for your specific system.
What is the NSN for 156/33?
156/33 is cataloged in the U.S. Government catalog under NSN 4730-00-217-2819. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.