PartsTable
Technical Data Sheet
121941 ✓ Verified by PartsTable
Hama · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The DISK BRAKE SHOE is a Hama industrial component. Key specifications include hole_diameter: 0.688 INCHES NOMINAL IN, overall_diameter: 1.313 INCHES NOMINAL IN, special_features: MECHANICALLY GALVANIZED, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-1976, 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
121941
NSN: 5330-00-291-1976
FSC: 5330
CAGE: 08683 — BROCKWAY MOTOR TRUCKS DIV OF MACK TRUCKS INC (USA)
SPECIFICATIONS
hole_diameter0.688 INCHES NOMINAL IN
overall_diameter1.313 INCHES NOMINAL IN
special_featuresMECHANICALLY GALVANIZED
center_hole_shape_styleROUND
NSN5330-00-291-1976
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 121941 MFR: Hama ⚠ 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
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
SIDE RADIUS FROM GASKET CENTER: 0.380 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,NO. +3313-B MIL SPEC ALL MATERIAL RESPONSES OVERALL
APERTURE DIAMETER: 0.510 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER: 0.812 INCHES NOMINAL IN
HOLE DIAMETER: 0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CROSS-SECTIONAL THICKNESS: 0.060 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
SIDE RADIUS FROM GASKET CENTER0.380 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,NO. +3313-B MIL SPEC ALL MATERIAL RESPONSES OVERALL
APERTURE DIAMETER0.510 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER0.812 INCHES NOMINAL IN
HOLE DIAMETER0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CROSS-SECTIONAL THICKNESS0.060 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.250 INCHES NOMINAL IN
OVERALL WIDTH1.312 INCHES NOMINAL IN
MATERIALPAPER AND GLUE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
121941Interchangeable
interchangeable cross-reference
interchangeable
101146Interchangeable
interchangeable cross-reference
interchangeable
33173Interchangeable
interchangeable cross-reference
interchangeable
ASTM F436-TY1-5/8Interchangeable
interchangeable cross-reference
interchangeable
412362Interchangeable
Same NIIN cross-reference
interchangeable
C146-13Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121941?
121941 is a DISK BRAKE SHOE manufactured by Hama.
What parts can replace 121941?
There are 6 known substitutes for 121941: 121941, 101146, 33173 and 3 more. Substitute compatibility should be verified for your specific system.
Is 121941 still available?
121941 is currently cancelled.
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