PartsTable
Technical Data Sheet
M-1283 ✓ 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

FILTER ELEMENT,AIR CONDITIONING. Key specifications include material: COPPER ALLOY OVERALL, body_width: 0.938 INCHES NOMINAL IN, flow_angle: 90.0 DEGREES, leg_length: 0.312 INCHES NOMINAL FIRST END IN, seat_angle: 45.0 DEGREES FIRST END, body_height: 1.438 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-221-8749, 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
M-1283
NSN: 4730-00-221-8749
FSC: 4730
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
body_width0.938 INCHES NOMINAL IN
flow_angle90.0 DEGREES
leg_length0.312 INCHES NOMINAL FIRST END IN
seat_angle45.0 DEGREES FIRST END
body_height1.438 INCHES NOMINAL IN
body_length1.688 INCHES NOMINAL IN
thread_class2B FIRST END
inclosure_typeFULLY INCLOSED
connection_typeTHREADED INTERNAL TUBE FIRST END
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
connection_styleINVERTED FLARE (TUBE) FIRST END
NSN4730-00-221-8749
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M-1283 · 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
THREAD CLASS: 2B FIRST END
MATERIAL: COPPER ALLOY OVERALL
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
LEG LENGTH: 1.375 INCHES NOMINAL SECOND END IN
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
CONNECTION STYLE: INVERTED FLARE (TUBE) FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B FIRST END
MATERIALCOPPER ALLOY OVERALL
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
SPECIAL FEATURESEXTERNAL TUBE 0.625-18ON END
LEG LENGTH1.375 INCHES NOMINAL SECOND END IN
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
CONNECTION STYLEINVERTED FLARE (TUBE) FIRST END
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
CONNECTION STYLEINVERTED FLARE (TUBE) SECOND END
LEG LENGTH0.312 INCHES NOMINAL FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
71567Interchangeable
interchangeable cross-reference
interchangeable
71362Interchangeable
interchangeable cross-reference
interchangeable
72567Interchangeable
interchangeable cross-reference
interchangeable
M1283Interchangeable
interchangeable cross-reference
interchangeable
D71362Interchangeable
interchangeable cross-reference
interchangeable
7G95Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M-1283?
M-1283 is a FILTER ELEMENT,AIR CONDITIONING.
What parts can replace M-1283?
There are 7 known substitutes for M-1283: 71567, 71362, 72567 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M-1283?
M-1283 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-221-8749. This indicates validated use in U.S. government and defense supply chains.
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