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Technical Data Sheet
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31231 ✓ Verified by PartsTable
Trefl · 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

Frame puzzles are the first educational game for the youngest children. It helps to develop perceptiveness, imagination and memory. Cardboard layers enables arranging the puzzles and the frame prevents the picture against scattering.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-351-3780, 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
31231
NSN: 4710-00-351-3780
FSC: 4710
CAGE: 06177 — PNEUDRAULICS, INC. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.523 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter3.000 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size2.750 INCHES SINGLE THREADED PORTION IN
under_flange_height0.555 INCHES NOMINAL IN
body_inside_diameter2.427 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch14 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
flange_seat_to_disk_end_height0.270 INCHES NOMINAL IN
NSN4710-00-351-3780
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 31231 · Trefl ⚠ 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
7HA6654Interchangeable
interchangeable cross-reference
interchangeable
T8399Interchangeable
interchangeable cross-reference
interchangeable
SPEEDBONDER 312Interchangeable
interchangeable cross-reference
interchangeable
1052369Interchangeable
interchangeable cross-reference
interchangeable
2795574Interchangeable
interchangeable cross-reference
interchangeable
31-231Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31231?
31231 is a WEDGE,LOCK,ADJUSTING manufactured by Trefl.
What parts can replace 31231?
There are 12 known substitutes for 31231: 7HA6654, T8399, SPEEDBONDER 312 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31231?
31231 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-351-3780. 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