F4B — BUMPER
✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW
F4B: BUMPER.
The BUMPER is a the manufacturer industrial component. Key specifications include material: PLASTIC, hole_diameter: 0.130 INCHES NOMINAL IN, overall_height: 0.375 INCHES NOMINAL IN, special_features: WITH BRASS INSERT, style_designator: FLAT TOP CHAMFERED SHANK COUNTERBORED, chamfer_angle_in_deg: 10.0. This part is cataloged in the U.S.
Government catalog under NSN 5340-00-343-3526, 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
F4B
NSN: 5340-00-343-3526 FSC: 5340 — Hardware, CommercialCAGE: 31827 — BUDWIG MFG CO (USA)
SPECIFICATIONS
material PLASTIC hole_diameter 0.130 INCHES NOMINAL IN overall_height 0.375 INCHES NOMINAL IN special_features WITH BRASS INSERT style_designator FLAT TOP CHAMFERED SHANK COUNTERBORED chamfer_angle_in_deg 10.0 fastening_device_size NO. 4-40 MACHINE SCREW fastening_device_type MACHINE SCREW first_counterbore_depth 0.215 INCHES NOMINAL IN first_counterbore_diameter 0.238 INCHES NOMINAL IN outside/top_flange_diameter 0.585 INCHES NOMINAL IN NSN 5340-00-343-3526
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION
ID: —
CROSS-SECTION
CS: —
SPECIFICATION
Material: —
Durometer: —
Temp: —
PN: F4B
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
• OUTSIDE/TOP FLANGE DIAMETER: 0.585 INCHES NOMINAL IN
• FASTENING DEVICE TYPE: MACHINE SCREW
• FIRST COUNTERBORE DIAMETER: 0.238 INCHES NOMINAL IN
• STYLE DESIGNATOR: FLAT TOP CHAMFERED SHANK COUNTERBORED
• FIRST COUNTERBORE DEPTH: 0.215 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT 0.375 INCHES NOMINAL IN OUTSIDE/TOP FLANGE DIAMETER 0.585 INCHES NOMINAL IN FASTENING DEVICE TYPE MACHINE SCREW FIRST COUNTERBORE DIAMETER 0.238 INCHES NOMINAL IN STYLE DESIGNATOR FLAT TOP CHAMFERED SHANK COUNTERBORED FIRST COUNTERBORE DEPTH 0.215 INCHES NOMINAL IN COLOR BLACK SPECIAL FEATURES WITH BRASS INSERT CHAMFER ANGLE IN DEG 10.0 FASTENING DEVICE SIZE NO. 4-40 MACHINE SCREW
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
SUBSTITUTES & CROSS-REFERENCES 1
757511 Same NSN cross-reference Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN status Active · U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM) No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is F4B?
F4B is a BUMPER.
What parts can replace F4B?
There is 1 known substitute for F4B: 757511. Substitute compatibility should be verified for your specific system.
What is the NSN for F4B?
F4B is cataloged in the U.S. Government catalog under NSN 5340-00-343-3526. This indicates validated use in U.S. government and defense supply chains.