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100-D-571 — ADAPTER,STRAIGHT,PIPE TO HOSE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

100-D-571: ADAPTER,STRAIGHT,PIPE TO HOSE.

The ADAPTER,STRAIGHT,PIPE TO HOSE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, nominal_thread_size: 0.3750 INCHES SECOND END IN, nominal_overall_length: 3.6875 INCHES IN, end_item_identification: COOLER,AIR,EVAPORATIVE; NSN 4120-01-487-6901; NUCLEAR REACTOR BOUNDRY AREA. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-490-0309, 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
100-D-571
NSN: 4730-01-490-0309
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 1MME1 — THERMAL ENGINEERING INTERNATIONAL (USA) INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
special_featuresVENT/DRAIN FOR TELL-TALE SYSTEM; 3/8 IN. NPS UN-2A, THREAD LENGTH 0.391 IN; INCLUDES ALLOWANCE FOR O-RING, THEN 11/16 IN. HEX.; OTHER END- MIN. 3 IN. LENGTH OF PIPE OVER WHICH HOSE IS CLAMPED A
nominal_thread_size0.3750 INCHES SECOND END IN
nominal_overall_length3.6875 INCHES IN
end_item_identificationCOOLER,AIR,EVAPORATIVE; NSN 4120-01-487-6901; NUCLEAR REACTOR BOUNDRY AREA
media_for_which_designedWATER SINGLE RESPONSE
thread_series_designatorNPS SECOND END
specification/standard_data81349-MIL-C-19836B GOVERNMENT SPECIFICATION
material_document_and_classificationMIL-C-15726F, 90/10 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyCONNECTOR
NSN4730-01-490-0309
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 100-D-571 · 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
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.6750 INCHES FIRST END IN
•
NOMINAL OVERALL LENGTH: 3.6875 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15726F, 90/10 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.3750 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEPLAIN (TUBE) FIRST END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.6750 INCHES FIRST END IN
NOMINAL OVERALL LENGTH3.6875 INCHES IN
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
CONNECTION TYPEUNTHREADED EXTERNAL HOSE FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726F, 90/10 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.3750 INCHES SECOND END IN
SPECIFICATION/STANDARD DATA81349-MIL-C-19836B GOVERNMENT SPECIFICATION
SPECIAL FEATURESVENT/DRAIN FOR TELL-TALE SYSTEM; 3/8 IN. NPS UN-2A, THREAD LENGTH 0.391 IN; INCLUDES ALLOWANCE FOR O-RING, THEN 11/16 IN. HEX.; OTHER END- MIN. 3 IN. LENGTH OF PIPE OVER WHICH HOSE IS CLAMPED A
SUBSTITUTES & CROSS-REFERENCES 2
700-D-758Reference document
Same NSN cross-reference
Reference document — Secondary reference
700-D-758 ITEM 1-13Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 100-D-571?
100-D-571 is a ADAPTER,STRAIGHT,PIPE TO HOSE.
What parts can replace 100-D-571?
There are 2 known substitutes for 100-D-571: 700-D-758, 700-D-758 ITEM 1-13. Substitute compatibility should be verified for your specific system.
What is the NSN for 100-D-571?
100-D-571 is cataloged in the U.S. Government catalog under NSN 4730-01-490-0309. This indicates validated use in U.S. government and defense supply chains.
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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.