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1-1157-54 — RING,BACK UP,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1-1157-54: RING,BACK UP,VALVE.

The RING,BACK UP,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, joint_type: SCARF-PERIPHERAL CASE, peripheral_diameter: 0.671 INCHES MINIMUM AND 0.675 INCHES MAXIMUM IN, center_hole_diameter: 0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN, cross-sectional_height: 0.050 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN, cross-sectional_shape_style: SQUARE/RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-963-8658, 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
1-1157-54
NSN: 4820-00-963-8658
NIINs: 009638658, 010670377
FSC: 4820 — Valves, Nonpowered
CAGE: 50551 — ROCKWELL MFG CO REPUBLIC DIV (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
joint_typeSCARF-PERIPHERAL CASE
peripheral_diameter0.671 INCHES MINIMUM AND 0.675 INCHES MAXIMUM IN
center_hole_diameter0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
cross-sectional_height0.050 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
NSN4820-00-963-8658
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1-1157-54 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1-1157-54?
1-1157-54 is a RING,BACK UP,VALVE.
What is the NSN for 1-1157-54?
1-1157-54 is cataloged in the U.S. Government catalog under NSN 4820-00-963-8658. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.