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Technical Data Sheet
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631A ✓ 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 STRAINER ELEMENT,SEDIMENT is a the manufacturer industrial component. Key specifications include material: COPPER AND NICKEL ALLOY BODY, special_features: MONEL BASKET STRAINER ELEMENT WITH HANDLE FOR 3.5 INCH STRAINER IN, style_designator: CYLINDRICAL, operating_pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS, end_connection_type: FLANGE W/BAIL FIRST END, perforation_diameter: 0.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-157-3629, 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
631A
NSN: 4730-01-157-3629
FSC: 4730
CAGE: 78527 — STAPLES & PFEIFFER, INC. (USA)
SPECIFICATIONS
materialCOPPER AND NICKEL ALLOY BODY
special_featuresMONEL BASKET STRAINER ELEMENT WITH HANDLE FOR 3.5 INCH STRAINER IN
style_designatorCYLINDRICAL
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
end_connection_typeFLANGE W/BAIL FIRST END
perforation_diameter0.250 INCHES NOMINAL IN
perforation_quantity8.0 PER SQUARE INCH
filtering_media_designPERFORATED SINGLE FILTERING MEDIA RESPONSE
end_item_identificationSMART MTR CON
media_for_which_designedWATER
first_intake_connection_typePLAIN FACE FLANGE SIDE
material_document_and_classification31846 - ASTM B 61 ASSN STD SINGLE MATERIAL RESPONSE BODY
NSN4730-01-157-3629
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 631A · 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
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS
•
FIRST DISCHARGE CONNECTION RELATIONSHIP TO INTAKE CONNECTION: IDENTICAL TO FIRST INTAKE CONNECTION
•
STYLE DESIGNATOR: TWIN STRAINER W/CLAMPED COVER
•
FIRST INTAKE FLANGE OUTSIDE DIAMETER: 5.062 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE SCREENING
•
OPERATING PRESSURE: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
FIRST INTAKE FLANGE THICKNESS: 0.437 INCHES NOMINAL IN
•
FILTERING MEDIA DESIGN: PERFORATED SINGLE FILTERING MEDIA RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 CLASS
FIRST DISCHARGE CONNECTION RELATIONSHIP TO INTAKE CONNECTIONIDENTICAL TO FIRST INTAKE CONNECTION
STYLE DESIGNATORTWIN STRAINER W/CLAMPED COVER
FIRST INTAKE FLANGE OUTSIDE DIAMETER5.062 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE SCREENING
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
FIRST INTAKE FLANGE THICKNESS0.437 INCHES NOMINAL IN
FILTERING MEDIA DESIGNPERFORATED SINGLE FILTERING MEDIA RESPONSE
SPECIFICATION/STANDARD DATA81349-MIL-C-17849D GOVERNMENT SPECIFICATION
MATERIALCOPPER ALLOY SCREENING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
30819Interchangeable
interchangeable cross-reference
interchangeable
SC5935-0142-1Interchangeable
interchangeable cross-reference
interchangeable
05070-0213Interchangeable
interchangeable cross-reference
interchangeable
535744-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-17849Interchangeable
interchangeable cross-reference
interchangeable
AR13S4823-255940Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 631A?
631A is a STRAINER ELEMENT,SEDIMENT.
What parts can replace 631A?
There are 28 known substitutes for 631A: 30819, SC5935-0142-1, 05070-0213 and 25 more. Substitute compatibility should be verified for your specific system.
Is 631A still available?
631A 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