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A51B20318-23 — HINGE,BUTT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51B20318-23: HINGE,BUTT.

The HINGE,BUTT is a the manufacturer industrial component. Key specifications include body_width: 10.500 INCHES NOMINAL IN, knuckle_type: FRICTION, performance_type: NOT RATED, pin_removability: NONREMOVABLE, style_designator: BUTT, material_thickness: 0.062 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-232-4344, 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
A51B20318-23
NSN: 5340-01-232-4344
FSC: 5340 — Hardware, Commercial
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
body_width10.500 INCHES NOMINAL IN
knuckle_typeFRICTION
performance_typeNOT RATED
pin_removabilityNONREMOVABLE
style_designatorBUTT
material_thickness0.062 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
hinge_mounting_typeFULL SURFACE
mounting_hole_diameter0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
mounting_hole_quantity4
pin_center_to_body_edge_distance0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
NSN5340-01-232-4344
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51B20318-23 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
•
MOUNTING HOLE QUANTITY: 4
•
REVERSIBLE FEATURE: NOT INCLUDED
•
BODY WIDTH: 10.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BUTT
•
MOUNTING HOLE DIAMETER: 0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
•
PIN CENTER TO BODY EDGE DISTANCE: 0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
•
HINGE MOUNTING TYPE: FULL SURFACE
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY4
REVERSIBLE FEATURENOT INCLUDED
BODY WIDTH10.500 INCHES NOMINAL IN
STYLE DESIGNATORBUTT
MOUNTING HOLE DIAMETER0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
PIN CENTER TO BODY EDGE DISTANCE0.605 INCHES MINIMUM AND 0.645 INCHES MAXIMUM IN
HINGE MOUNTING TYPEFULL SURFACE
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
PIN REMOVABILITYNONREMOVABLE
KNUCKLE TYPEFRICTION
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)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B20318-23?
A51B20318-23 is a HINGE,BUTT.
What is the NSN for A51B20318-23?
A51B20318-23 is cataloged in the U.S. Government catalog under NSN 5340-01-232-4344. 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.