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PartsTable / COMPONENT / 311-03 ITEM 3
311-03 ITEM 3 ✓ 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 head_style: ROUND, head_height: 0.137 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.359 INCHES NOMINAL IN, thread_length: 1.500 INCHES NOMINAL IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-451-4975, 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
311-03 ITEM 3
NSN: 4730-01-451-4975
FSC: 4730
CAGE: 59958 — CLEVELAND GEAR COMPANY, INC. DBA CLEVELAND GEAR CO (USA)
SPECIFICATIONS
head_styleROUND
head_height0.137 INCHES NOMINAL IN
thread_class2A A
head_diameter0.359 INCHES NOMINAL IN
thread_length1.500 INCHES NOMINAL IN
screw_materialSTEEL
fastener_length1.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.190 INCHES IN
screw_surface_treatmentNICKEL
thread_quantity_per_inch24
NSN4730-01-451-4975
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 311-03 ITEM 3 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
DH37D-6Interchangeable
interchangeable cross-reference
interchangeable
31139Interchangeable
interchangeable cross-reference
interchangeable
31138Interchangeable
interchangeable cross-reference
interchangeable
4322 39Interchangeable
interchangeable cross-reference
interchangeable
47554Interchangeable
interchangeable cross-reference
interchangeable
5463070Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 311-03 ITEM 3?
311-03 ITEM 3 is a STRAINER ELEMENT,SEDIMENT.
What parts can replace 311-03 ITEM 3?
There are 10 known substitutes for 311-03 ITEM 3: DH37D-6, 31139, 31138 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 311-03 ITEM 3?
311-03 ITEM 3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-451-4975. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026