WASHER: SPRING - New Surplus
P/N: sp56b
Category: Fasteners & Hardware
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| New Surplus | 300 Available |
Product Description
The sp56b is a helical spring lock washer designed to maintain clamp load in aircraft fastener assemblies under vibration. Manufactured from steel and conforming to NASM35338 (formerly MS35338) and ASME B18.21.1 standards, this washer installs under screw or nut heads in aircraft panels and equipment mounts. The helical design provides continuous spring tension that resists fastener loosening during flight operations and maintenance cycles.
Installation requires verification of torque values and washer size per the applicable aircraft maintenance manual during MRO procedures.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the WASHER: SPRING (P/N sp56b)?
The sp56b is a helical spring lock washer designed to maintain clamp load in aircraft fastener assemblies under vibration. Manufactured from steel and conforming to NASM35338 (formerly MS35338) and ASME B18.
Does the sp56b meet AN/MS/NAS aviation specifications?
Aircraft hardware is manufactured to military and aviation specifications. The WASHER: SPRING conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.
What material is the sp56b manufactured from?
Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the sp56b.
Can I order the sp56b in custom quantities?
Yes, we sell hardware in various quantities from single units to bulk lots. The WASHER: SPRING is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.