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1581A921 — HINGE,BUTT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1581A921: HINGE,BUTT.

The HINGE,BUTT is a the manufacturer industrial component. Key specifications include material: UNABLE TO DECODE, body_width: 36.000 INCHES NOMINAL IN, special_features: KNUCKLE LGTH 0.50"; RANGE OF MOTION 270 DEG, style_designator: BUTT, material_thickness: 0.050 INCHES NOMINAL IN, pin_center_to_body_edge_distance: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-561-1319, 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
1581A921
NSN: 5340-01-561-1319
FSC: 5340 — Hardware, Commercial
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialUNABLE TO DECODE
body_width36.000 INCHES NOMINAL IN
special_featuresKNUCKLE LGTH 0.50"; RANGE OF MOTION 270 DEG
style_designatorBUTT
material_thickness0.050 INCHES NOMINAL IN
pin_center_to_body_edge_distance0.750 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyPIANO HINGES WITHOUT HOLES
NSN5340-01-561-1319
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1581A921 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: 0
•
BODY WIDTH: 36.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BUTT
•
PIN CENTER TO BODY EDGE DISTANCE: 0.750 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.050 INCHES NOMINAL IN
•
MATERIAL: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY0
BODY WIDTH36.000 INCHES NOMINAL IN
STYLE DESIGNATORBUTT
PIN CENTER TO BODY EDGE DISTANCE0.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.050 INCHES NOMINAL IN
SPECIAL FEATURESKNUCKLE LGTH 0.50"; RANGE OF MOTION 270 DEG
PART NAME ASSIGNED BY CONTROLLING AGENCYPIANO HINGES WITHOUT HOLES
MATERIALUNABLE TO DECODE
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 1
1581A71Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 1581A921?
1581A921 is a HINGE,BUTT.
What parts can replace 1581A921?
There is 1 known substitute for 1581A921: 1581A71. Substitute compatibility should be verified for your specific system.
What is the NSN for 1581A921?
1581A921 is cataloged in the U.S. Government catalog under NSN 5340-01-561-1319. This indicates validated use in U.S. government and defense supply chains.
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