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D-31877 2.50IN 250FLG — Technical Data Sheet

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— · 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 STRAINER,SEDIMENT is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY FILTERING MEDIUM, body_width: 12.375 INCHES NOMINAL IN, body_height: 17.125 INCHES NOMINAL IN, body_length: 19.500 INCHES NOMINAL IN, style_designator: TWIN STRAINER W/BOLTED COVER, operating_pressure: 220.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-01-213-1699, 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
D-31877 2.50IN 250FLG
NSN: 4730-01-213-1699
FSC: 4730
CAGE: 09032 — TATE ANDALE, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY FILTERING MEDIUM
body_width12.375 INCHES NOMINAL IN
body_height17.125 INCHES NOMINAL IN
body_length19.500 INCHES NOMINAL IN
style_designatorTWIN STRAINER W/BOLTED COVER
operating_pressure220.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
first_intake_connection_typePLAIN FACE FLANGE SIDE NEAR TOP
first_intake_flange_thickness0.938 INCHES NOMINAL IN
first_intake_flange_face_stylePLAIN
first_intake_flange_shape_styleROUND W/UNTHREADED BOLT HOLES
first_intake_flange_outside_diameter6.125 INCHES NOMINAL IN
material_document_and_classificationMIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY
NSN4730-01-213-1699
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: D-31877 2.50IN 250FLG · 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
•
BODY HEIGHT: 17.125 INCHES NOMINAL IN
•
BODY WIDTH: 12.375 INCHES NOMINAL IN
•
FIRST INTAKE FLANGE FACE STYLE: PLAIN
•
FIRST INTAKE FLANGE THICKNESS: 0.938 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY FILTERING MEDIUM
•
DISTANCE FROM BOTTOM OF BODY TO CENTER OF INLET: 7.375 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE FILTERING MEDIUM
•
FIRST DISCHARGE CONNECTION RELATIONSHIP TO INTAKE CONNECTION: IDENTICAL TO FIRST INTAKE CONNECTION
TECHNICAL CHARACTERISTICS
BODY HEIGHT17.125 INCHES NOMINAL IN
BODY WIDTH12.375 INCHES NOMINAL IN
FIRST INTAKE FLANGE FACE STYLEPLAIN
FIRST INTAKE FLANGE THICKNESS0.938 INCHES NOMINAL IN
MATERIALNICKEL ALLOY FILTERING MEDIUM
DISTANCE FROM BOTTOM OF BODY TO CENTER OF INLET7.375 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE FILTERING MEDIUM
FIRST DISCHARGE CONNECTION RELATIONSHIP TO INTAKE CONNECTIONIDENTICAL TO FIRST INTAKE CONNECTION
FIRST INTAKE CONNECTION TYPEPLAIN FACE FLANGE SIDE NEAR TOP
FIRST INTAKE FLANGE OUTSIDE DIAMETER6.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
298-00-204 1/4IInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
298-00-204 REV E PC 43InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
298-00-204 1/2IN PC43InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
C536-17InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
G79-17InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
107B8253-17InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D-31877 2.50IN 250FLG?
D-31877 2.50IN 250FLG is a STRAINER,SEDIMENT.
What parts can replace D-31877 2.50IN 250FLG?
There are 15 known substitutes for D-31877 2.50IN 250FLG: 298-00-204 1/4I, 298-00-204 REV E PC 43, 298-00-204 1/2IN PC43 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D-31877 2.50IN 250FLG?
D-31877 2.50IN 250FLG is cataloged in the Federal Logistics Information System under NSN 4730-01-213-1699. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: October 2026