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1128BM42021-15 — LEAF,BUTT HINGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1128BM42021-15: LEAF,BUTT HINGE.

The LEAF,BUTT HINGE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, hinge_pin: NOT INCLUDED, knuckle_type: FRICTION, pin_diameter: 0.125 INCHES NOMINAL IN, overall_length: 3.430 INCHES NOMINAL IN, performance_type: NOT RATED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-444-3300, 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
1128BM42021-15
NSN: 5340-00-444-3300
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
hinge_pinNOT INCLUDED
knuckle_typeFRICTION
pin_diameter0.125 INCHES NOMINAL IN
overall_length3.430 INCHES NOMINAL IN
knuckle_quantity6
performance_typeNOT RATED
surface_treatmentOXIDE FILM OVERALL
material_thickness0.180 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
mounting_hole_diameter0.900 INCHES NOMINAL IN
mounting_hole_quantity38
NSN5340-00-444-3300
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1128BM42021-15 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PIN DIAMETER: 0.125 INCHES NOMINAL IN
•
MOUNTING HOLE QUANTITY: 38
•
REVERSIBLE FEATURE: NOT INCLUDED
•
MOUNTING HOLE DIAMETER: 0.900 INCHES NOMINAL IN
•
PIN CENTER TO BODY EDGE DISTANCE: 4.000 INCHES NOMINAL IN
•
HINGE PIN: NOT INCLUDED
•
MATERIAL THICKNESS: 0.180 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
PIN DIAMETER0.125 INCHES NOMINAL IN
MOUNTING HOLE QUANTITY38
REVERSIBLE FEATURENOT INCLUDED
MOUNTING HOLE DIAMETER0.900 INCHES NOMINAL IN
OVERALL LENGTH3.430 INCHES NOMINAL IN
PIN CENTER TO BODY EDGE DISTANCE4.000 INCHES NOMINAL IN
HINGE PINNOT INCLUDED
MATERIAL THICKNESS0.180 INCHES NOMINAL IN
KNUCKLE QUANTITY6
SURFACE TREATMENTOXIDE FILM OVERALL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 1128BM42021-15?
1128BM42021-15 is a LEAF,BUTT HINGE.
What is the NSN for 1128BM42021-15?
1128BM42021-15 is cataloged in the U.S. Government catalog under NSN 5340-00-444-3300. 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.