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A8957 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The TUBE,BENT,METALLIC is a the manufacturer industrial component. Key specifications include diameter: 0.250 INCHES NOMINAL IN, material: STEEL, construction: SEAMLESS, wall_thickness: 0.032 INCHES NOMINAL IN, first_end_style: PLAIN, end_item_identification: GRUMMAN AIRCRAFT MODEL A-10. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-797-3320, 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
A8957
NSN: 4710-00-797-3320
FSC: 4710
CAGE: 96787 — STEWART AVIONICS INC (USA)
SPECIFICATIONS
diameter0.250 INCHES NOMINAL IN
materialSTEEL
constructionSEAMLESS
wall_thickness0.032 INCHES NOMINAL IN
first_end_stylePLAIN
end_item_identificationGRUMMAN AIRCRAFT MODEL A-10
cross-sectional_shape_stylePLAIN ROUND
second_end_relationship_with_first_endIDENTICAL
NSN4710-00-797-3320
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: A8957 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: PLAIN ROUND
•
CONSTRUCTION: SEAMLESS
•
FIRST END STYLE: PLAIN
•
WALL THICKNESS: 0.032 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
END ITEM IDENTIFICATIONGRUMMAN AIRCRAFT MODEL A-10
DIAMETER0.250 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
CONSTRUCTIONSEAMLESS
FIRST END STYLEPLAIN
WALL THICKNESS0.032 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
120437Interchangeable
interchangeable cross-reference
interchangeable
1388Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS50861/2Interchangeable
interchangeable cross-reference
interchangeable
M5088/289Interchangeable
interchangeable cross-reference
interchangeable
BMS13-13T1C1-8Interchangeable
interchangeable cross-reference
interchangeable
1A9708Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A8957?
A8957 is a TUBE,BENT,METALLIC.
What parts can replace A8957?
There are 17 known substitutes for A8957: 120437, 1388, SAE-AS50861/2 and 14 more. Substitute compatibility should be verified for your specific system.
Is A8957 still available?
A8957 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