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Technical Data Sheet
PartsTable / COMPONENT / 451-1/2
451-1/2 ✓ 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 451-1/2 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 4730-01-645-3302, 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
451-1/2
NSN: 4730-01-645-3302
FSC: 4730
CAGE: 7W819 — PIPING SPECIALTIES INC (USA)
SPECIFICATIONS
Part Number451-1/2
NSN4730-01-645-3302
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 451-1/2 · 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 13
45112AInterchangeable
interchangeable cross-reference
interchangeable
45112Interchangeable
interchangeable cross-reference
interchangeable
11012-A516Interchangeable
interchangeable cross-reference
interchangeable
TABLE 5 D2 1/2IN W1/2INInterchangeable
interchangeable cross-reference
interchangeable
C45112Interchangeable
interchangeable cross-reference
interchangeable
45019Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 451-1/2?
451-1/2 is a 451-1/2.
What parts can replace 451-1/2?
There are 13 known substitutes for 451-1/2: 45112A, 45112, 11012-A516 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 451-1/2?
451-1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-645-3302. 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