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3G1977 ✓ 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 HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include overall_width: 11.750 INCHES NOMINAL IN, locking_device: NOT INCLUDED, overall_height: 14.000 INCHES NOMINAL IN, overall_length: 18.060 INCHES NOMINAL IN, handle_location: TOP, special_features: PYROTONE, FLAME RETARDANT, WATER REPELLANT, COLOR NO. 640 BLUEBERRY, W/NYLON LINING; VELCRO FASTENERS.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-01-186-3551, 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
3G1977
NSN: 4720-01-186-3551
FSC: 4720
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
overall_width11.750 INCHES NOMINAL IN
locking_deviceNOT INCLUDED
overall_height14.000 INCHES NOMINAL IN
overall_length18.060 INCHES NOMINAL IN
handle_locationTOP
handle_quantity1
special_featuresPYROTONE, FLAME RETARDANT, WATER REPELLANT, COLOR NO. 640 BLUEBERRY, W/NYLON LINING; VELCRO FASTENERS
end_item_identificationON-490/USM-63; CONSOLIDATED AUTOMATED SUPPORT SYSTEM (CASS)
part_name_assigned_by_controlling_agencyCONTAINER ASSEMBLY
NSN4720-01-186-3551
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 3G1977 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
57 1-4Interchangeable
interchangeable cross-reference
interchangeable
MSS SP-80Interchangeable
interchangeable cross-reference
interchangeable
2615207Interchangeable
interchangeable cross-reference
interchangeable
29456Interchangeable
interchangeable cross-reference
interchangeable
294.56Interchangeable
interchangeable cross-reference
interchangeable
GC536AE10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3G1977?
3G1977 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace 3G1977?
There are 7 known substitutes for 3G1977: 57 1-4, MSS SP-80, 2615207 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3G1977?
3G1977 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-01-186-3551. 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