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Technical Data Sheet
PartsTable / COMPONENT / 56691
56691 ✓ Verified by PartsTable
Hama · 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

- Plastic-coated and deformable.<br>- Size: 40 x 45 cm.<br>- For poles with a diameter of up to 70 mm. Key specifications include end_item_identification: 016691345,ENGINE AND BLOWER, part_name_assigned_by_controlling_agency: INLET RING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-287-1707, 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
56691
NSN: 4730-00-287-1707
FSC: 4730
CAGE: 08118 — EATON AVIATION CORPORATION (USA)
SPECIFICATIONS
end_item_identification016691345,ENGINE AND BLOWER
part_name_assigned_by_controlling_agencyINLET RING
NSN4730-00-287-1707
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 56691 · Hama ⚠ 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 ALL ENDS
•
MATERIAL: COPPER ALLOY OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNS ALL ENDS
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
SEAT ANGLE: 42.0 DEGREES ALL ENDS
•
THREAD QUANTITY PER INCH: 24 ALL ENDS
•
LEG LENGTH: 0.422 INCHES NOMINAL ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B ALL ENDS
MATERIALCOPPER ALLOY OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNS ALL ENDS
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SEAT ANGLE42.0 DEGREES ALL ENDS
THREAD QUANTITY PER INCH24 ALL ENDS
LEG LENGTH0.422 INCHES NOMINAL ALL ENDS IN
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
CONNECTION STYLEINVERTED FLARE (PIPE) ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
16195Interchangeable
interchangeable cross-reference
interchangeable
SAE-J512Interchangeable
interchangeable cross-reference
interchangeable
SAE J512 3-3-3 040401BAInterchangeable
interchangeable cross-reference
interchangeable
502-0373Interchangeable
interchangeable cross-reference
interchangeable
S306FHTInterchangeable
interchangeable cross-reference
interchangeable
182-123Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56691?
56691 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Hama.
What parts can replace 56691?
There are 19 known substitutes for 56691: 16195, SAE-J512, SAE J512 3-3-3 040401BA and 16 more. Substitute compatibility should be verified for your specific system.
Is 56691 still available?
56691 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026