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Technical Data Sheet
PartsTable / COMPONENT / MIL-T-20157
MIL-T-20157 ✓ 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

RESISTOR,FIXED,WIRE WOUND,INDUCT. Key specifications include material: STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE SECOND END, connection_style: PLAIN (PIPE) FIRST END, nominal_thread_size: 3.000 INCHES FIRST END IN, maximum_operating_temp: 775.0 FAHRENHEIT SINGLE RESPONSE DEGF, media_for_which_designed: WATER-OIL-GAS SINGLE RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-277-5788, 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
MIL-T-20157
NSN: 4710-00-277-5788
FSC: 4710
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
connection_typeTHREADED EXTERNAL PIPE SECOND END
connection_stylePLAIN (PIPE) FIRST END
nominal_thread_size3.000 INCHES FIRST END IN
maximum_operating_temp775.0 FAHRENHEIT SINGLE RESPONSE DEGF
media_for_which_designedWATER-OIL-GAS SINGLE RESPONSE
thread_series_designatorNPS FIRST END
nondefinitive_spec/std_dataE TYPE
specification/standard_data81349-MIL-T-20157 GOVERNMENT SPECIFICATION
NSN4710-00-277-5788
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: MIL-T-20157 · 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
•
NONDEFINITIVE SPEC/STD DATA: E TYPE
•
CONSTRUCTION: SEAMLESS
•
FIRST END STYLE: PLAIN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL
•
DIAMETER: 0.625 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 81349-MIL-T-20157 GOVERNMENT SPECIFICATION
•
MEASURING METHOD AND LENGTH: 114.000 INCHES NOMINAL SPECIFIC IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAE TYPE
CONSTRUCTIONSEAMLESS
FIRST END STYLEPLAIN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL
DIAMETER0.625 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81349-MIL-T-20157 GOVERNMENT SPECIFICATION
MEASURING METHOD AND LENGTH114.000 INCHES NOMINAL SPECIFIC IN
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
MAXIMUM OPERATING TEMP-775.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
4710PL0821155Interchangeable
Same NIIN cross-reference
interchangeable
M24691/1T5Interchangeable
Same NIIN cross-reference
interchangeable
MIL-P-24691/1Interchangeable
Same NIIN cross-reference
interchangeable
MIL-P-24691Interchangeable
Same NIIN cross-reference
interchangeable
115627220Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-T-20157?
MIL-T-20157 is a RESISTOR,FIXED,WIRE WOUND,INDUCT.
What parts can replace MIL-T-20157?
There are 5 known substitutes for MIL-T-20157: 4710PL0821155, M24691/1T5, MIL-P-24691/1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-T-20157?
MIL-T-20157 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-277-5788. 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