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Technical Data Sheet
PartsTable / COMPONENT / 43-1291
43-1291 ✓ Verified by PartsTable
— · 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 SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.198 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.375 INCHES NOMINAL IN, thread_length: 0.562 INCHES MINIMUM IN, screw_material: STEEL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-1651, 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
43-1291
NSN: 5330-00-291-1651
FSC: 5330
CAGE: 76680 — FEDERAL-MOGUL CORP CHASSIS PRODUCTS DIV (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.198 INCHES NOMINAL IN
thread_class3A A
head_diameter0.375 INCHES NOMINAL IN
thread_length0.562 INCHES MINIMUM IN
screw_materialSTEEL
fastener_length1.438 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
internal_drive_styleSLOT
nominal_thread_diameter0.250 INCHES IN
screw_surface_treatmentCADMIUM
NSN5330-00-291-1651
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 43-1291 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
•
HOUSING BORE DIAMETER: 3.751 INCHES NOMINAL IN
•
SEAL WIDTH: 0.609 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: ANGULAR
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 200 FEET PER MINUTE FT
•
ACCOMMODATED SHAFT DIAMETER: 2.750 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER3.751 INCHES NOMINAL IN
SEAL WIDTH0.609 INCHES MINIMUM AND 0.672 INCHES MAXIMUM IN
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT MAXIMUM RATED SPEED200 FEET PER MINUTE FT
ACCOMMODATED SHAFT DIAMETER2.750 INCHES NOMINAL IN
CASE STYLESQUARE
MATERIALSTEEL CASE
MATERIALLEATHER OR RUBBER SYNTHETIC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
23343FInterchangeable
interchangeable cross-reference
interchangeable
2030X4AInterchangeable
interchangeable cross-reference
interchangeable
6-6531Interchangeable
interchangeable cross-reference
interchangeable
35004Interchangeable
interchangeable cross-reference
interchangeable
1998424-1Interchangeable
interchangeable cross-reference
interchangeable
00035-0004Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 43-1291?
43-1291 is a SHAFT,SHOULDERED.
What parts can replace 43-1291?
There are 17 known substitutes for 43-1291: 23343F, 2030X4A, 6-6531 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 43-1291?
43-1291 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-1651. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026