PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 21781-043
21781-043 ✓ 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 RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 0.312 INCHES NOMINAL IN, orifice_diameter: 0.125 INCHES NOMINAL IN, end_item_identification: 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-359-2531, 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
21781-043
NSN: 4730-01-359-2531
FSC: 4730
CAGE: 54846 — MODULAR CONTROLS CORP (USA)
SPECIFICATIONS
length0.312 INCHES NOMINAL IN
orifice_diameter0.125 INCHES NOMINAL IN
end_item_identification2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
NSN4730-01-359-2531
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21781-043 · 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: 0.312 INCHES NOMINAL IN
•
ORIFICE DIAMETER: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATION2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
LENGTH0.312 INCHES NOMINAL IN
ORIFICE DIAMETER0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
2178-1Interchangeable
interchangeable cross-reference
interchangeable
JE763Interchangeable
interchangeable cross-reference
interchangeable
P864Interchangeable
interchangeable cross-reference
interchangeable
5166139Interchangeable
interchangeable cross-reference
interchangeable
WWD 98389Interchangeable
interchangeable cross-reference
interchangeable
2HL567Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 21781-043?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 21781-043?
21781-043 is a RESTRICTOR,FLUID FLOW.
What parts can replace 21781-043?
There are 6 known substitutes for 21781-043: 2178-1, JE763, P864 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21781-043?
21781-043 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-359-2531. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 21781-043

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026