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HC112E — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

HC112E: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include thread_size: 1.250-16, thread_class: 3B, thread_length: 0.375 INCHES NOMINAL IN, overall_length: 0.688 INCHES NOMINAL IN, special_features: 1 DRILLED AND TAPPED HOLE 3/16 IN.,- 32 THD LOCATED 1/4 IN. FROM THD END OF NUT ON HEX IN, style_designator: HEXAGON, INTERNAL THREAD, SHOULDERED.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-274-3378, 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
HC112E
NSN: 4730-00-274-3378
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 16712 — SIEMENS ENERGY, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 410 OR STEEL COMP 416 OR STEEL COMP 420 OR STEEL COMP 430
thread_size1.250-16
thread_class3B
thread_length0.375 INCHES NOMINAL IN
overall_length0.688 INCHES NOMINAL IN
special_features1 DRILLED AND TAPPED HOLE 3/16 IN.,- 32 THD LOCATED 1/4 IN. FROM THD END OF NUT ON HEX IN
style_designatorHEXAGON, INTERNAL THREAD, SHOULDERED
thread_directionRIGHT-HAND
length_to_shoulder0.500 INCHES NOMINAL IN
width_across_flats1.625 INCHES NOMINAL IN
screw_thread_locationINTERNAL
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-274-3378
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HC112E · 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
•
LENGTH TO SHOULDER: 0.500 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.625 INCHES NOMINAL IN
•
THREAD LENGTH: 0.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HEXAGON, INTERNAL THREAD, SHOULDERED
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD SIZE: 1.250-16
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.500 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.625 INCHES NOMINAL IN
THREAD LENGTH0.375 INCHES NOMINAL IN
STYLE DESIGNATORHEXAGON, INTERNAL THREAD, SHOULDERED
OVERALL LENGTH0.688 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE1.250-16
SPECIAL FEATURES1 DRILLED AND TAPPED HOLE 3/16 IN.,- 32 THD LOCATED 1/4 IN. FROM THD END OF NUT ON HEX IN
SCREW THREAD SERIES DESIGNATORUN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HC112E?
HC112E is a PACKING NUT.
What is the NSN for HC112E?
HC112E is cataloged in the U.S. Government catalog under NSN 4730-00-274-3378. 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.